/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hp.hpl.jena.sparql.expr.nodevalue;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NodeFunctions.checkAndGetStringLiteral ;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NodeFunctions.checkTwoArgumentStringLiterals ;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NumericType.OP_DECIMAL ;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NumericType.OP_DOUBLE ;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NumericType.OP_FLOAT ;
import static com.hp.hpl.jena.sparql.expr.nodevalue.NumericType.OP_INTEGER ;
import static javax.xml.datatype.DatatypeConstants.DAYS ;
import static javax.xml.datatype.DatatypeConstants.HOURS ;
import static javax.xml.datatype.DatatypeConstants.MINUTES ;
import static javax.xml.datatype.DatatypeConstants.MONTHS ;
import static javax.xml.datatype.DatatypeConstants.SECONDS ;
import static javax.xml.datatype.DatatypeConstants.YEARS ;
import java.math.BigDecimal ;
import java.math.BigInteger ;
import java.util.HashSet ;
import java.util.List ;
import java.util.Set ;
import java.util.regex.Matcher ;
import java.util.regex.Pattern ;
import javax.xml.datatype.DatatypeConstants ;
import javax.xml.datatype.DatatypeConstants.Field ;
import javax.xml.datatype.Duration ;
import javax.xml.datatype.XMLGregorianCalendar ;
import org.apache.jena.atlas.lib.StrUtils ;
import org.apache.jena.atlas.logging.Log ;
import org.apache.jena.riot.system.IRILib ;
import com.hp.hpl.jena.datatypes.RDFDatatype ;
import com.hp.hpl.jena.datatypes.xsd.XSDDatatype ;
import com.hp.hpl.jena.datatypes.xsd.XSDDateTime ;
import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.graph.NodeFactory ;
import com.hp.hpl.jena.sparql.ARQInternalErrorException ;
import com.hp.hpl.jena.sparql.SystemARQ ;
import com.hp.hpl.jena.sparql.expr.* ;
import com.hp.hpl.jena.sparql.util.DateTimeStruct ;
/**
* Implementation of XQuery/XPath functions and operators.
* http://www.w3.org/TR/xpath-functions/ */
public class XSDFuncOp
{
private XSDFuncOp() {}
// The choice of "24" is arbitrary but more than 18 as required by F&O
private static final int DIVIDE_PRECISION = 24 ;
// --------------------------------
// Numeric operations
// http://www.w3.org/TR/xpath-functions/#op.numeric
// http://www.w3.org/TR/xpath-functions/#comp.numeric
public static NodeValue numAdd(NodeValue nv1, NodeValue nv2) {
switch (classifyNumeric("add", nv1, nv2)) {
case OP_INTEGER :
return NodeValue.makeInteger(nv1.getInteger().add(nv2.getInteger())) ;
case OP_DECIMAL :
return NodeValue.makeDecimal(nv1.getDecimal().add(nv2.getDecimal())) ;
case OP_FLOAT :
return NodeValue.makeFloat(nv1.getFloat() + nv2.getFloat()) ;
case OP_DOUBLE :
return NodeValue.makeDouble(nv1.getDouble() + nv2.getDouble()) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : (" + nv1 + " ," + nv2 + ")") ;
}
}
public static NodeValue numSubtract(NodeValue nv1, NodeValue nv2) {
switch (classifyNumeric("subtract", nv1, nv2)) {
case OP_INTEGER :
return NodeValue.makeInteger(nv1.getInteger().subtract(nv2.getInteger())) ;
case OP_DECIMAL :
return NodeValue.makeDecimal(nv1.getDecimal().subtract(nv2.getDecimal())) ;
case OP_FLOAT :
return NodeValue.makeFloat(nv1.getFloat() - nv2.getFloat()) ;
case OP_DOUBLE :
return NodeValue.makeDouble(nv1.getDouble() - nv2.getDouble()) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : (" + nv1 + " ," + nv2 + ")") ;
}
}
public static NodeValue numMultiply(NodeValue nv1, NodeValue nv2) {
switch (classifyNumeric("multiply", nv1, nv2)) {
case OP_INTEGER :
return NodeValue.makeInteger(nv1.getInteger().multiply(nv2.getInteger())) ;
case OP_DECIMAL :
return NodeValue.makeDecimal(nv1.getDecimal().multiply(nv2.getDecimal())) ;
case OP_FLOAT :
return NodeValue.makeFloat(nv1.getFloat() * nv2.getFloat()) ;
case OP_DOUBLE :
return NodeValue.makeDouble(nv1.getDouble() * nv2.getDouble()) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : (" + nv1 + " ," + nv2 + ")") ;
}
}
/* Quote from XQuery/XPath F&O:
For xs:float or xs:double values, a positive number divided by positive zero returns INF.
A negative number divided by positive zero returns -INF.
Division by negative zero returns -INF and INF, respectively.
Positive or negative zero divided by positive or negative zero returns NaN.
Also, INF or -INF divided by INF or -INF returns NaN.
*/
public static NodeValue numDivide(NodeValue nv1, NodeValue nv2) {
switch (classifyNumeric("divide", nv1, nv2)) {
case OP_INTEGER : {
if ( nv2.getInteger().equals(BigInteger.ZERO) )
throw new ExprEvalException("Divide by zero in divide") ;
// Note: result is a decimal
BigDecimal d1 = new BigDecimal(nv1.getInteger()) ;
BigDecimal d2 = new BigDecimal(nv2.getInteger()) ;
return decimalDivide(d1, d2) ;
}
case OP_DECIMAL : {
if ( nv2.getDecimal().compareTo(BigDecimal.ZERO) == 0 )
throw new ExprEvalException("Divide by zero in decimal divide") ;
BigDecimal d1 = nv1.getDecimal() ;
BigDecimal d2 = nv2.getDecimal() ;
return decimalDivide(d1, d2) ;
}
case OP_FLOAT :
// No need to check for divide by zero
return NodeValue.makeFloat(nv1.getFloat() / nv2.getFloat()) ;
case OP_DOUBLE :
// No need to check for divide by zero
return NodeValue.makeDouble(nv1.getDouble() / nv2.getDouble()) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : (" + nv1 + " ," + nv2 + ")") ;
}
}
private static NodeValue decimalDivide(BigDecimal d1, BigDecimal d2) {
try {
BigDecimal d3 = d1.divide(d2, DIVIDE_PRECISION, BigDecimal.ROUND_FLOOR) ;
return messAroundWithBigDecimalFormat(d3) ;
} catch (ArithmeticException ex) {
Log.warn(XSDFuncOp.class, "ArithmeticException in decimal divide - attempting to treat as doubles") ;
BigDecimal d3 = new BigDecimal(d1.doubleValue() / d2.doubleValue()) ;
return NodeValue.makeDecimal(d3) ;
}
}
private static NodeValue messAroundWithBigDecimalFormat(BigDecimal d) {
String x = d.toPlainString() ;
// The part after the "."
int dotIdx = x.indexOf('.') ;
if ( dotIdx < 0 )
// No DOT.
return NodeValue.makeNode(x, XSDDatatype.XSDdecimal) ;
// Has a DOT.
int i = x.length() - 1 ;
// dotIdx+1 to leave at least ".0"
while ((i > dotIdx + 1) && x.charAt(i) == '0')
i-- ;
if ( i < x.length() - 1 )
// And trailing zeros.
x = x.substring(0, i + 1) ;
// Avoid as expensive.
// x = x.replaceAll("0+$", "") ;
return NodeValue.makeNode(x, XSDDatatype.XSDdecimal) ;
}
public static NodeValue max(NodeValue nv1, NodeValue nv2) {
int x = compareNumeric(nv1, nv2) ;
if ( x == Expr.CMP_LESS )
return nv2 ;
return nv1 ;
}
public static NodeValue min(NodeValue nv1, NodeValue nv2) {
int x = compareNumeric(nv1, nv2) ;
if ( x == Expr.CMP_GREATER )
return nv2 ;
return nv1 ;
}
/** F&O fn:not */
public static NodeValue not(NodeValue nv) {
boolean b = XSDFuncOp.booleanEffectiveValue(nv) ;
return NodeValue.booleanReturn(!b) ;
}
/** F&O fn:boolean */
public static NodeValue booleanEffectiveValueAsNodeValue(NodeValue nv) {
if ( nv.isBoolean() ) // "Optimization" (saves on object churn)
return nv ;
return NodeValue.booleanReturn(booleanEffectiveValue(nv)) ;
}
/** F&O fn:boolean */
public static boolean booleanEffectiveValue(NodeValue nv) {
// Apply the "boolean effective value" rules
// boolean: value of the boolean (strictly, if derived from xsd:boolean)
// string: length(string) > 0
// numeric: number != Nan && number != 0
// http://www.w3.org/TR/xquery/#dt-ebv
if ( nv.isBoolean() )
return nv.getBoolean() ;
if ( nv.isString() )
return nv.getString().length() > 0 ;
if ( nv.isInteger() )
return !nv.getInteger().equals(NodeValue.IntegerZERO) ;
if ( nv.isDecimal() )
return !nv.getDecimal().equals(NodeValue.DecimalZERO) ;
if ( nv.isDouble() )
return nv.getDouble() != 0.0 ;
NodeValue.raise(new ExprEvalException("Not a boolean effective value (wrong type): " + nv)) ;
// Does not return
return false ;
}
public static NodeValue unaryMinus(NodeValue nv) {
switch (classifyNumeric("unaryMinus", nv)) {
case OP_INTEGER :
return NodeValue.makeInteger(nv.getInteger().negate()) ;
case OP_DECIMAL :
return NodeValue.makeDecimal(nv.getDecimal().negate()) ;
case OP_FLOAT :
return NodeValue.makeFloat(-nv.getFloat()) ;
case OP_DOUBLE :
return NodeValue.makeDouble(-nv.getDouble()) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + nv) ;
}
}
public static NodeValue unaryPlus(NodeValue nv) {
// Not quite a no-op - tests for a number
NumericType opType = classifyNumeric("unaryPlus", nv) ;
return nv ;
}
public static NodeValue abs(NodeValue nv) {
switch (classifyNumeric("abs", nv)) {
case OP_INTEGER :
return NodeValue.makeInteger(nv.getInteger().abs()) ;
case OP_DECIMAL :
return NodeValue.makeDecimal(nv.getDecimal().abs()) ;
case OP_FLOAT :
return NodeValue.makeFloat(Math.abs(nv.getFloat())) ;
case OP_DOUBLE :
return NodeValue.makeDouble(Math.abs(nv.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + nv) ;
}
}
public static NodeValue ceiling(NodeValue v) {
switch (classifyNumeric("ceiling", v)) {
case OP_INTEGER :
return v ;
case OP_DECIMAL :
BigDecimal dec = v.getDecimal().setScale(0, BigDecimal.ROUND_CEILING) ;
return NodeValue.makeDecimal(dec) ;
case OP_FLOAT :
return NodeValue.makeFloat((float)Math.ceil(v.getFloat())) ;
case OP_DOUBLE :
return NodeValue.makeDouble(Math.ceil(v.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + v) ;
}
}
public static NodeValue floor(NodeValue v) {
switch (classifyNumeric("floor", v)) {
case OP_INTEGER :
return v ;
case OP_DECIMAL :
BigDecimal dec = v.getDecimal().setScale(0, BigDecimal.ROUND_FLOOR) ;
return NodeValue.makeDecimal(dec) ;
case OP_FLOAT :
return NodeValue.makeFloat((float)Math.floor(v.getFloat())) ;
case OP_DOUBLE :
return NodeValue.makeDouble(Math.floor(v.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + v) ;
}
}
public static NodeValue round(NodeValue v) {
switch (classifyNumeric("round", v)) {
case OP_INTEGER :
return v ;
case OP_DECIMAL :
int sgn = v.getDecimal().signum() ;
BigDecimal dec ;
if ( sgn < 0 )
dec = v.getDecimal().setScale(0, BigDecimal.ROUND_HALF_DOWN) ;
else
dec = v.getDecimal().setScale(0, BigDecimal.ROUND_HALF_UP) ;
return NodeValue.makeDecimal(dec) ;
case OP_FLOAT :
return NodeValue.makeFloat(Math.round(v.getFloat())) ;
case OP_DOUBLE :
return NodeValue.makeDouble(Math.round(v.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + v) ;
}
}
public static NodeValue sqrt(NodeValue v) {
switch (classifyNumeric("sqrt", v)) {
case OP_INTEGER :
case OP_DECIMAL :
double dec = v.getDecimal().doubleValue() ;
return NodeValue.makeDecimal(Math.sqrt(dec)) ;
case OP_FLOAT :
// NB - returns a double
return NodeValue.makeDouble(Math.sqrt(v.getDouble())) ;
case OP_DOUBLE :
return NodeValue.makeDouble(Math.sqrt(v.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : " + v) ;
}
}
// NB Java string start from zero and uses start/end
// F&O strings start from one and uses start/length
public static NodeValue javaSubstring(NodeValue v1, NodeValue v2) {
return javaSubstring(v1, v2, null) ;
}
public static NodeValue javaSubstring(NodeValue nvString, NodeValue nvStart, NodeValue nvFinish) {
try {
String string = nvString.getString() ;
int start = nvStart.getInteger().intValue() ;
if ( nvFinish == null )
return NodeValue.makeString(string.substring(start)) ;
int finish = nvFinish.getInteger().intValue() ;
return NodeValue.makeString(string.substring(start, finish)) ;
} catch (IndexOutOfBoundsException ex) {
throw new ExprEvalException("IndexOutOfBounds", ex) ;
}
}
public static NodeValue strlen(NodeValue nvString) {
Node n = checkAndGetStringLiteral("strlen", nvString) ;
int len = n.getLiteralLexicalForm().length() ;
return NodeValue.makeInteger(len) ;
}
public static NodeValue strReplace(NodeValue nvStr, NodeValue nvPattern, NodeValue nvReplacement, NodeValue nvFlags) {
String pat = checkAndGetStringLiteral("replace", nvPattern).getLiteralLexicalForm() ;
int flags = 0 ;
if ( nvFlags != null ) {
String flagsStr = checkAndGetStringLiteral("replace", nvFlags).getLiteralLexicalForm() ;
flags = RegexJava.makeMask(flagsStr) ;
}
return strReplace(nvStr, Pattern.compile(pat, flags), nvReplacement) ;
}
public static NodeValue strReplace(NodeValue nvStr, Pattern pattern, NodeValue nvReplacement) {
String n = checkAndGetStringLiteral("replace", nvStr).getLiteralLexicalForm() ;
String rep = checkAndGetStringLiteral("replace", nvReplacement).getLiteralLexicalForm() ;
String x = replaceAll(pattern.matcher(n), rep) ;
if ( x == null )
// No replacement.
return nvStr ;
return calcReturn(x, nvStr.asNode()) ;
}
// Jena's replaceAll and xsd:func-replace differ in the handling of matching
// an empty string.
// Java: ("", ".*", "x") --> "x" and ("notEmpty", ".*", "x") --> "xx"
// F&O: [err:FORX0003] (in F&O, a global error; SPARQL does not have global execution errors)
// http://www.w3.org/TR/xpath-functions/#func-replace
// ARQ
private static String replaceAll(Matcher matcher, String rep) {
// Follow Java -- return matcher.replaceAll(rep) ;
try {
StringBuffer sb = null ; // Delay until needed
while(matcher.find()) {
if ( sb == null )
sb = new StringBuffer() ;
else {
// Do one match of zerolength string otherwise filter out.
if (matcher.start() == matcher.end() )
continue ;
}
matcher.appendReplacement(sb, rep);
}
if ( sb == null )
return null ;
matcher.appendTail(sb);
return sb.toString();
} catch (IndexOutOfBoundsException ex) {
throw new ExprEvalException("IndexOutOfBounds", ex) ;
}
}
public static NodeValue strReplace(NodeValue nvStr, NodeValue nvPattern, NodeValue nvReplacement) {
return strReplace(nvStr, nvPattern, nvReplacement, null) ;
}
public static NodeValue substring(NodeValue v1, NodeValue v2) {
return substring(v1, v2, null) ;
}
public static NodeValue substring(NodeValue nvString, NodeValue nvStart, NodeValue nvLength) {
Node n = checkAndGetStringLiteral("substring", nvString) ;
RDFDatatype dt = n.getLiteralDatatype() ;
String lang = n.getLiteralLanguage() ;
// A string of some kind.
// XSD F&O:
try {
// NaN, float and double.
String string = n.getLiteralLexicalForm() ;
int start = intValueStr(nvStart, string.length() + 1) ;
int length ;
if ( nvLength != null )
length = intValueStr(nvLength, 0) ;
else {
length = string.length() ;
if ( start < 0 )
length = length - start ; // Address to end of string.
}
int finish = start + length ;
// Adjust for zero and negative rules for XSD.
// Calculate the finish, regardless of whether start is zero of
// negative ...
// Adjust to java - and ensure within the string.
// F&O strings are one-based ; convert to java, 0 based.
// java needs indexes in-bounds.
if ( start <= 0 )
start = 1 ;
start-- ;
finish-- ;
if ( finish > string.length() )
finish = string.length() ; // Java index must be within bounds.
if ( finish < start )
finish = start ;
if ( finish < 0 )
finish = 0 ;
if ( string.length() == 0 )
return calcReturn("", n) ;
String lex2 = string.substring(start, finish) ;
return calcReturn(lex2, n) ;
} catch (IndexOutOfBoundsException ex) {
throw new ExprEvalException("IndexOutOfBounds", ex) ;
}
}
private static int intValueStr(NodeValue nv, int valueNan) {
if ( nv.isInteger() )
return nv.getInteger().intValue() ;
if ( nv.isDecimal() )
// No decimal round in Java 1.4
return (int)Math.round(nv.getDecimal().doubleValue()) ;
if ( nv.isFloat() ) {
float f = nv.getFloat() ;
if ( Float.isNaN(f) )
return valueNan ;
return Math.round(f) ;
}
if ( nv.isDouble() ) {
double d = nv.getDouble() ;
if ( Double.isNaN(d) )
return valueNan ;
return (int)Math.round(d) ;
}
throw new ExprEvalException("Not a number:" + nv) ;
}
public static NodeValue strContains(NodeValue string, NodeValue match) {
checkTwoArgumentStringLiterals("contains", string, match) ;
String lex1 = string.asNode().getLiteralLexicalForm() ;
String lex2 = match.asNode().getLiteralLexicalForm() ;
boolean x = StrUtils.contains(lex1, lex2) ;
return NodeValue.booleanReturn(x) ;
}
public static NodeValue strStartsWith(NodeValue string, NodeValue match) {
checkTwoArgumentStringLiterals("strStarts", string, match) ;
String lex1 = string.asNode().getLiteralLexicalForm() ;
String lex2 = match.asNode().getLiteralLexicalForm() ;
return NodeValue.booleanReturn(lex1.startsWith(lex2)) ;
}
public static NodeValue strEndsWith(NodeValue string, NodeValue match) {
checkTwoArgumentStringLiterals("strEnds", string, match) ;
String lex1 = string.asNode().getLiteralLexicalForm() ;
String lex2 = match.asNode().getLiteralLexicalForm() ;
return NodeValue.booleanReturn(lex1.endsWith(lex2)) ;
}
private static NodeValue calcReturn(String result, Node arg) {
Node n2 = NodeFactory.createLiteral(result, arg.getLiteralLanguage(), arg.getLiteralDatatype()) ;
return NodeValue.makeNode(n2) ;
// if ( arg.getLiteralDatatype() != null )
// {
// if ( arg.getLiteralDatatype() != XSDDatatype.XSDstring )
// throw new ARQInternalErrorException("Excepted only xsd:string: "+arg) ;
// // Must be xsd:string
// return NodeValue.makeNode(result, XSDDatatype.XSDstring ) ;
// }
// String lang = arg.getLiteralLanguage() ;
// if ( lang == null ) lang = "" ;
// if ( lang.equals("") ) return NodeValue.makeString(result) ;
// return NodeValue.makeNode(result, lang, (String)null) ;
}
public static NodeValue strBefore(NodeValue string, NodeValue match) {
checkTwoArgumentStringLiterals("strBefore", string, match) ;
String lex1 = string.asNode().getLiteralLexicalForm() ;
String lex2 = match.asNode().getLiteralLexicalForm() ;
Node mainArg = string.asNode() ;
if ( lex2.length() == 0 )
return calcReturn("", mainArg) ;
int i = lex1.indexOf(lex2) ;
if ( i < 0 )
return NodeValue.nvEmptyString ;
String s = lex1.substring(0, i) ;
return calcReturn(s, string.asNode()) ;
}
public static NodeValue strAfter(NodeValue string, NodeValue match) {
checkTwoArgumentStringLiterals("strAfter", string, match) ;
String lex1 = string.asNode().getLiteralLexicalForm() ;
String lex2 = match.asNode().getLiteralLexicalForm() ;
Node mainArg = string.asNode() ;
if ( lex2.length() == 0 )
return calcReturn(lex1, mainArg) ;
int i = lex1.indexOf(lex2) ;
if ( i < 0 )
return NodeValue.nvEmptyString ;
i += lex2.length() ;
String s = lex1.substring(i) ;
return calcReturn(s, string.asNode()) ;
}
public static NodeValue strLowerCase(NodeValue string) {
Node n = checkAndGetStringLiteral("lcase", string) ;
String lex = n.getLiteralLexicalForm() ;
String lex2 = lex.toLowerCase() ;
return calcReturn(lex2, string.asNode()) ;
}
public static NodeValue strUpperCase(NodeValue string) {
Node n = checkAndGetStringLiteral("ucase", string) ;
String lex = n.getLiteralLexicalForm() ;
String lex2 = lex.toUpperCase() ;
return calcReturn(lex2, string.asNode()) ;
}
public static NodeValue strEncodeForURI(NodeValue v) {
Node n = v.asNode() ;
if ( !n.isLiteral() )
throw new ExprEvalException("Not a literal") ;
if ( n.getLiteralDatatype() != null ) {
if ( !n.getLiteralDatatype().equals(XSDDatatype.XSDstring) )
throw new ExprEvalException("Not a string literal") ;
}
String str = n.getLiteralLexicalForm() ;
String encStr = IRILib.encodeUriComponent(str) ;
encStr = IRILib.encodeNonASCII(encStr) ;
return NodeValue.makeString(encStr) ;
}
/** F&O fn:concat (implicit cast to strings). */
public static NodeValue fnConcat(List<NodeValue> args) {
StringBuilder sb = new StringBuilder() ;
for (NodeValue arg : args) {
String x = arg.asString() ;
sb.append(x) ;
}
return NodeValue.makeString(sb.toString()) ;
}
/** SPARQL CONCAT (no implicit casts to strings) */
public static NodeValue strConcat(List<NodeValue> args) {
// Step 1 : Choose type.
// One lang tag -> that lang tag
String lang = null ;
boolean mixedLang = false ;
boolean xsdString = false ;
boolean simpleLiteral = false ;
StringBuilder sb = new StringBuilder() ;
for (NodeValue nv : args) {
Node n = checkAndGetStringLiteral("CONCAT", nv) ;
String lang1 = n.getLiteralLanguage() ;
if ( !lang1.equals("") ) {
if ( lang != null && !lang1.equals(lang) )
// throw new
// ExprEvalException("CONCAT: Mixed language tags: "+args) ;
mixedLang = true ;
lang = lang1 ;
} else if ( n.getLiteralDatatype() != null )
xsdString = true ;
else
simpleLiteral = true ;
sb.append(n.getLiteralLexicalForm()) ;
}
if ( mixedLang )
return NodeValue.makeString(sb.toString()) ;
// Must be all one lang.
if ( lang != null ) {
if ( !xsdString && !simpleLiteral )
return NodeValue.makeNode(sb.toString(), lang, (String)null) ;
else
// Lang and one or more of xsd:string or simpleLiteral.
return NodeValue.makeString(sb.toString()) ;
}
if ( simpleLiteral && xsdString )
return NodeValue.makeString(sb.toString()) ;
// All xsdString
if ( xsdString )
return NodeValue.makeNode(sb.toString(), XSDDatatype.XSDstring) ;
if ( simpleLiteral )
return NodeValue.makeString(sb.toString()) ;
// No types - i.e. no arguments
return NodeValue.makeString(sb.toString()) ;
}
public static NumericType classifyNumeric(String fName, NodeValue nv1, NodeValue nv2) {
if ( !nv1.isNumber() )
throw new ExprEvalTypeException("Not a number (first arg to " + fName + "): " + nv1) ;
if ( !nv2.isNumber() )
throw new ExprEvalTypeException("Not a number (second arg to " + fName + "): " + nv2) ;
if ( nv1.isInteger() ) {
if ( nv2.isInteger() )
return OP_INTEGER ;
if ( nv2.isDecimal() )
return OP_DECIMAL ;
if ( nv2.isFloat() )
return OP_FLOAT ;
if ( nv2.isDouble() )
return OP_DOUBLE ;
throw new ARQInternalErrorException("Numeric op unrecognized (second arg to " + fName + "): " + nv2) ;
}
if ( nv1.isDecimal() ) {
if ( nv2.isDecimal() )
return OP_DECIMAL ;
if ( nv2.isFloat() )
return OP_FLOAT ;
if ( nv2.isDouble() )
return OP_DOUBLE ;
throw new ARQInternalErrorException("Numeric op unrecognized (second arg to " + fName + "): " + nv2) ;
}
if ( nv1.isFloat() ) {
if ( nv2.isFloat() )
return OP_FLOAT ;
if ( nv2.isDouble() )
return OP_DOUBLE ;
throw new ARQInternalErrorException("Numeric op unrecognized (second arg to " + fName + "): " + nv2) ;
}
if ( nv1.isDouble() ) {
if ( nv2.isDouble() )
return OP_DOUBLE ;
throw new ARQInternalErrorException("Numeric op unrecognized (second arg to " + fName + "): " + nv2) ;
}
throw new ARQInternalErrorException("Numeric op unrecognized (first arg to " + fName + "): " + nv1) ;
}
public static NumericType classifyNumeric(String fName, NodeValue nv) {
if ( !nv.isNumber() )
throw new ExprEvalTypeException("Not a number: (" + fName + ") " + nv) ;
if ( nv.isInteger() )
return OP_INTEGER ;
if ( nv.isDecimal() )
return OP_DECIMAL ;
if ( nv.isFloat() )
return OP_FLOAT ;
if ( nv.isDouble() )
return OP_DOUBLE ;
throw new ARQInternalErrorException("Numeric op unrecognized (" + fName + "): " + nv) ;
}
private static Set<XSDDatatype> integerSubTypes = new HashSet<>() ;
static {
// decimalSubTypes.add(XSDDatatype.XSDfloat) ;
// decimalSubTypes.add(XSDDatatype.XSDdouble) ;
integerSubTypes.add(XSDDatatype.XSDint) ;
integerSubTypes.add(XSDDatatype.XSDlong) ;
integerSubTypes.add(XSDDatatype.XSDshort) ;
integerSubTypes.add(XSDDatatype.XSDbyte) ;
integerSubTypes.add(XSDDatatype.XSDunsignedByte) ;
integerSubTypes.add(XSDDatatype.XSDunsignedShort) ;
integerSubTypes.add(XSDDatatype.XSDunsignedInt) ;
integerSubTypes.add(XSDDatatype.XSDunsignedLong) ;
// integerSubTypes.add(XSDDatatype.XSDdecimal) ;
integerSubTypes.add(XSDDatatype.XSDinteger) ;
integerSubTypes.add(XSDDatatype.XSDnonPositiveInteger) ;
integerSubTypes.add(XSDDatatype.XSDnonNegativeInteger) ;
integerSubTypes.add(XSDDatatype.XSDpositiveInteger) ;
integerSubTypes.add(XSDDatatype.XSDnegativeInteger) ;
}
public static boolean isNumericType(XSDDatatype xsdDatatype) {
if ( XSDDatatype.XSDfloat.equals(xsdDatatype) )
return true ;
if ( XSDDatatype.XSDdouble.equals(xsdDatatype) )
return true ;
return isDecimalType(xsdDatatype) ;
}
public static boolean isDecimalType(XSDDatatype xsdDatatype) {
if ( XSDDatatype.XSDdecimal.equals(xsdDatatype) )
return true ;
return isIntegerType(xsdDatatype) ;
}
public static boolean isIntegerType(XSDDatatype xsdDatatype) {
return integerSubTypes.contains(xsdDatatype) ;
}
// --------------------------------
// Comparisons operations
// Do not confuse with sameValueAs/notSamevalueAs
private static int calcReturn(int x) {
if ( x < 0 )
return Expr.CMP_LESS ;
if ( x > 0 )
return Expr.CMP_GREATER ;
return Expr.CMP_EQUAL ;
}
public static int compareNumeric(NodeValue nv1, NodeValue nv2) {
NumericType opType = classifyNumeric("compareNumeric", nv1, nv2) ;
switch (opType) {
case OP_INTEGER :
return calcReturn(nv1.getInteger().compareTo(nv2.getInteger())) ;
case OP_DECIMAL :
return calcReturn(nv1.getDecimal().compareTo(nv2.getDecimal())) ;
case OP_FLOAT :
return calcReturn(Float.compare(nv1.getFloat(), nv2.getFloat())) ;
case OP_DOUBLE :
return calcReturn(Double.compare(nv1.getDouble(), nv2.getDouble())) ;
default :
throw new ARQInternalErrorException("Unrecognized numeric operation : (" + nv1 + " ," + nv2 + ")") ;
}
}
//public static int compareDatetime(NodeValue nv1, NodeValue nv2)
// --------------------------------
// Functions on strings
// http://www.w3.org/TR/xpath-functions/#d1e2222
// http://www.w3.org/TR/xpath-functions/#substring.functions
// String operations
// stringCompare = fn:compare
// fn:length
// fn:string-concat
// fn:substring
// langMatch
public static int compareString(NodeValue nv1, NodeValue nv2) {
return calcReturn(nv1.getString().compareTo(nv2.getString())) ;
}
// --------------------------------
// Date/DateTime operations
// http://www.w3.org/TR/xpath-functions/#comp.duration.datetime
// dateTimeCompare
// works for dates as well because they are implemented as dateTimes on their start point.
public static int compareDateTime(NodeValue nv1, NodeValue nv2) {
if ( SystemARQ.StrictDateTimeFO )
return compareDateTimeFO(nv1, nv2) ;
return compareXSDDateTime(nv1.getDateTime(), nv2.getDateTime()) ;
}
// public static int compareDate(NodeValue nv1, NodeValue nv2) {
// if ( strictDateTimeFO )
// return compareDateFO(nv1, nv2) ;
// return compareXSDDateTime(nv1.getDateTime(), nv2.getDateTime()) ;
// }
//
// public static int compareTime(NodeValue nv1, NodeValue nv2) {
// if ( strictDateTimeFO )
// return compareDateFO(nv1, nv2) ;
// return compareXSDDateTime(nv1.getDateTime(), nv2.getDateTime()) ;
// }
public static int compareDuration(NodeValue nv1, NodeValue nv2) {
return compareDuration(nv1.getDuration(), nv2.getDuration()) ;
}
// public static int compareGYear(NodeValue nv1, NodeValue nv2)
// {
// return -99 ;
// }
// public static int compareGYearMonth(NodeValue nv1, NodeValue nv2)
// {
// return -99 ;
// }
// public static int compareGMonth(NodeValue nv1, NodeValue nv2)
// {
// return -99 ;
// }
// public static int compareGMonthDay(NodeValue nv1, NodeValue nv2)
// {
// return -99 ;
// }
// public static int compareGDay(NodeValue nv1, NodeValue nv2)
// {
// return -99 ;
// }
public static final String defaultTimezone = "Z" ;
/** Strict F&O handling of compare date(times).
* But that means applying the "local" timezone if there is no TZ.
* The data may have come from different timezones to the query.
*/
private static int compareDateTimeFO(NodeValue nv1, NodeValue nv2) {
XMLGregorianCalendar dt1 = nv1.getDateTime() ;
XMLGregorianCalendar dt2 = nv2.getDateTime() ;
int x = compareXSDDateTime(dt1, dt2) ;
if ( x == XSDDateTime.INDETERMINATE ) {
NodeValue nv3 = (nv1.isDate()) ? fixupDate(nv1) : fixupDateTime(nv1) ;
if ( nv3 != null ) {
XMLGregorianCalendar dt3 = nv3.getDateTime() ;
x = compareXSDDateTime(dt3, dt2) ;
if ( x == XSDDateTime.INDETERMINATE )
throw new ARQInternalErrorException("Still get indeterminate comparison") ;
return x ;
}
nv3 = (nv2.isDate()) ? fixupDate(nv2) : fixupDateTime(nv2) ;
if ( nv3 != null ) {
XMLGregorianCalendar dt3 = nv3.getDateTime() ;
x = compareXSDDateTime(dt1, dt3) ;
if ( x == XSDDateTime.INDETERMINATE )
throw new ARQInternalErrorException("Still get indeterminate comparison") ;
return x ;
}
throw new ARQInternalErrorException("Failed to fixup dateTimes") ;
}
return x ;
}
// // This only differs by some "dateTime" => "date"
// // Comparison is done on the dateTime start point of an xsd:date so this code is not needed.
// private static int compareDateFO(NodeValue nv1, NodeValue nv2)
// {
// XMLGregorianCalendar dt1 = nv1.getDateTime() ;
// XMLGregorianCalendar dt2 = nv2.getDateTime() ;
//
// int x = compareXSDDateTime(dt1, dt2) ; // Yes - compareDateTIme
// if ( x == XSDDateTime.INDETERMINATE )
// {
// NodeValue nv3 = fixupDate(nv1) ;
// if ( nv3 != null )
// {
// XMLGregorianCalendar dt3 = nv3.getDateTime() ;
// x = compareXSDDateTime(dt3, dt2) ;
// if ( x == XSDDateTime.INDETERMINATE )
// throw new ARQInternalErrorException("Still get indeterminate comparison") ;
// return x ;
// }
//
// nv3 = fixupDate(nv2) ;
// if ( nv3 != null )
// {
// XMLGregorianCalendar dt3 = nv3.getDateTime() ;
// x = compareXSDDateTime(dt1, dt3) ;
// if ( x == XSDDateTime.INDETERMINATE )
// throw new ARQInternalErrorException("Still get indeterminate comparison") ;
// return x ;
// }
//
// throw new ARQInternalErrorException("Failed to fixup dateTimes") ;
// }
// return x ;
// }
private static NodeValue fixupDateOrDateTime(NodeValue nv) {
if ( nv.isDateTime() )
return fixupDateTime(nv);
if ( nv.isDate() )
return fixupDate(nv);
throw new ARQInternalErrorException("Attempt to fixupDateOrDateTime on "+nv);
}
private static NodeValue fixupDateTime(NodeValue nv) {
DateTimeStruct dts = DateTimeStruct.parseDateTime(nv.asNode().getLiteralLexicalForm()) ;
if ( dts.timezone != null )
return null ;
dts.timezone = defaultTimezone ;
nv = NodeValue.makeDateTime(dts.toString()) ;
if ( !nv.isDateTime() )
throw new ARQInternalErrorException("Failed to reform an xsd:dateTime") ;
return nv ;
}
private static NodeValue fixupDate(NodeValue nv) {
DateTimeStruct dts = DateTimeStruct.parseDate(nv.asNode().getLiteralLexicalForm()) ;
if ( dts.timezone != null )
return null ;
dts.timezone = defaultTimezone ;
nv = NodeValue.makeDate(dts.toString()) ;
if ( !nv.isDate() )
throw new ARQInternalErrorException("Failed to reform an xsd:date") ;
return nv ;
}
/** Compare date times, including "indeterminate" rather than applying locale timezone */
private static int compareXSDDateTime(XMLGregorianCalendar dt1, XMLGregorianCalendar dt2) {
// Returns codes are -1/0/1 but also 2 for "Indeterminate"
// which occurs when one has a timezone and one does not
// and they are less then 14 hours apart.
// F&O has an "implicit timezone" - this code implements the XMLSchema
// compare algorithm.
int x = dt1.compare(dt2) ;
return convertComparison(x) ;
}
private static int compareDuration(Duration duration1, Duration duration2) {
// Returns codes are -1/0/1 but also 2 for "Indeterminate"
// Not fully sure when Indeterminate is returned with regards to a
// duration
int x = duration1.compare(duration2) ;
return convertComparison(x) ;
}
private static int convertComparison(int x) {
if ( x == DatatypeConstants.EQUAL )
return Expr.CMP_EQUAL ;
if ( x == DatatypeConstants.LESSER )
return Expr.CMP_LESS ;
if ( x == DatatypeConstants.GREATER )
return Expr.CMP_GREATER ;
if ( x == DatatypeConstants.INDETERMINATE )
return Expr.CMP_INDETERMINATE ;
throw new ARQInternalErrorException("Unexpected return from XSDDuration.compare: " + x) ;
}
// --------------------------------
// Boolean operations
/* Logical OR and AND is special with respect to handling errors truth table.
* AND they take effective boolean values, not boolean
*
A B | NOT A A && B A || B
-------------------------------------
E E | E E E
E T | E E T
E F | E F E
T E | F E T
T T | F T T
T F | F F T
F E | T F E
F T | T F T
F F | T F F
*/
// Not possible because of error masking.
// public static NodeValue logicalOr(NodeValue x, NodeValue y)
// public static NodeValue logicalAnd(NodeValue x, NodeValue y)
public static int compareBoolean(NodeValue nv1, NodeValue nv2) {
boolean b1 = nv1.getBoolean() ;
boolean b2 = nv2.getBoolean() ;
if ( b1 == b2 )
return Expr.CMP_EQUAL ;
if ( !b1 && b2 )
return Expr.CMP_LESS ;
if ( b1 && !b2 )
return Expr.CMP_GREATER ;
throw new ARQInternalErrorException("Weird boolean comparison: " + nv1 + ", " + nv2) ;
}
public static boolean dateTimeCastCompatible(NodeValue nv, XSDDatatype xsd) {
return nv.hasDateTime() ;
}
/** Cast a NodeValue to a date/time type (xsd dateTime, date, time, g*) according to F&O
* <a href="http://www.w3.org/TR/xpath-functions/#casting-to-datetimes">17.1.5 Casting to date and time types</a>
* Throws an exception on incorrect case.
*
* @throws ExprEvalTypeException
*/
public static NodeValue dateTimeCast(NodeValue nv, String typeURI) {
RDFDatatype t = NodeFactory.getType(typeURI) ;
return dateTimeCast(nv, t) ;
}
/** Cast a NodeValue to a date/time type (xsd dateTime, date, time, g*) according to F&O
* <a href="http://www.w3.org/TR/xpath-functions/#casting-to-datetimes">17.1.5 Casting to date and time types</a>
* Throws an exception on incorrect case.
*
* @throws ExprEvalTypeException
*/
public static NodeValue dateTimeCast(NodeValue nv, RDFDatatype rdfDatatype) {
if ( !(rdfDatatype instanceof XSDDatatype) )
throw new ExprEvalTypeException("Can't cast to XSDDatatype: " + nv) ;
XSDDatatype xsd = (XSDDatatype)rdfDatatype ;
return dateTimeCast(nv, xsd) ;
}
/** Get the timezone in XSD tiezone format (e.g. "Z" or "+01:00").
* Assumes the NodeValue is of suitable datatype.
*/
private static String tzStrFromNV(NodeValue nv) {
DateTimeStruct dts = parseAnyDT(nv) ;
if ( dts == null )
return "" ;
String tzStr = dts.timezone ;
if ( tzStr == null )
tzStr = "" ;
return tzStr ;
}
/** Cast a NodeValue to a date/time type (xsd dateTime, date, time, g*) according to F&O
* <a href="http://www.w3.org/TR/xpath-functions/#casting-to-datetimes">17.1.5 Casting to date and time types</a>
* Throws an exception on incorrect case.
*
* @throws ExprEvalTypeException
*/
public static NodeValue dateTimeCast(NodeValue nv, XSDDatatype xsd) {
// http://www.w3.org/TR/xpath-functions/#casting-to-datetimes
if ( !nv.hasDateTime() )
throw new ExprEvalTypeException("Not a date/time type: " + nv) ;
XMLGregorianCalendar xsdDT = nv.getDateTime() ;
if ( XSDDatatype.XSDdateTime.equals(xsd) ) {
// ==> DateTime
if ( nv.isDateTime() )
return nv ;
if ( !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:dateTime: " + nv) ;
// DateTime with time 00:00:00 ... and timezone, if any
String tzStr = tzStrFromNV(nv) ;
String x = String.format("%04d-%02d-%02dT00:00:00%s", xsdDT.getYear(), xsdDT.getMonth(), xsdDT.getDay(),
tzStr) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDdate.equals(xsd) ) {
// ==> Date
if ( nv.isDate() )
return nv ;
if ( !nv.isDateTime() )
throw new ExprEvalTypeException("Can't cast to XSD:date: " + nv) ;
// Timezone
String tzStr = tzStrFromNV(nv) ;
String x = String.format("%04d-%02d-%02d%s", xsdDT.getYear(), xsdDT.getMonth(), xsdDT.getDay(), tzStr) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDtime.equals(xsd) ) {
// ==> time
if ( nv.isTime() )
return nv ;
if ( !nv.isDateTime() )
throw new ExprEvalTypeException("Can't cast to XSD:time: " + nv) ;
// Careful formatting
DateTimeStruct dts = parseAnyDT(nv) ;
if ( dts.timezone == null )
dts.timezone = "" ;
String x = String.format("%s:%s:%s%s", dts.hour, dts.minute, dts.second, dts.timezone) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDgYear.equals(xsd) ) {
// ==> Year
if ( nv.isGYear() )
return nv ;
if ( !nv.isDateTime() && !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:gYear: " + nv) ;
String x = String.format("%04d", xsdDT.getYear()) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDgYearMonth.equals(xsd) ) {
// ==> YearMonth
if ( nv.isGYearMonth() )
return nv ;
if ( !nv.isDateTime() && !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:gYearMonth: " + nv) ;
String x = String.format("%04d-%02d", xsdDT.getYear(), xsdDT.getMonth()) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDgMonth.equals(xsd) ) {
// ==> Month
if ( nv.isGMonth() )
return nv ;
if ( !nv.isDateTime() && !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:gMonth: " + nv) ;
String x = String.format("--%02d", xsdDT.getMonth()) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDgMonthDay.equals(xsd) ) {
// ==> MonthDay
if ( nv.isGMonthDay() )
return nv ;
if ( !nv.isDateTime() && !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:gMonthDay: " + nv) ;
String x = String.format("--%02d-%02d", xsdDT.getMonth(), xsdDT.getDay()) ;
return NodeValue.makeNode(x, xsd) ;
}
if ( XSDDatatype.XSDgDay.equals(xsd) ) {
// Day
if ( nv.isGDay() )
return nv ;
if ( !nv.isDateTime() && !nv.isDate() )
throw new ExprEvalTypeException("Can't cast to XSD:gDay: " + nv) ;
String x = String.format("---%02d", xsdDT.getDay()) ;
return NodeValue.makeNode(x, xsd) ;
}
throw new ExprEvalTypeException("Can't case to <" + xsd.getURI() + ">: " + nv) ;
}
// Get years/months/days/hours/minutes/seconds from any type we understands.
public static NodeValue getYear(NodeValue nv) {
if ( nv.isDuration() ) return durGetYears(nv) ;
return dtGetYear(nv) ;
}
public static NodeValue getMonth(NodeValue nv) {
if ( nv.isDuration() ) return durGetMonths(nv) ;
return dtGetMonth(nv) ;
}
public static NodeValue getDay(NodeValue nv) {
if ( nv.isDuration() ) return XSDFuncOp.durGetDays(nv) ;
return dtGetDay(nv) ;
}
public static NodeValue getHours(NodeValue nv) {
if ( nv.isDuration() ) return XSDFuncOp.durGetHours(nv) ;
return dtGetHours(nv) ;
}
public static NodeValue getMinutes(NodeValue nv) {
if ( nv.isDuration() ) return XSDFuncOp.durGetMinutes(nv) ;
return dtGetMinutes(nv) ;
}
public static NodeValue getSeconds(NodeValue nv) {
if ( nv.isDuration() ) return XSDFuncOp.durGetSeconds(nv) ;
return dtGetSeconds(nv) ;
}
// Datetime accessors
public static NodeValue dtGetYear(NodeValue nv) {
if ( nv.isDateTime() || nv.isDate() || nv.isGYear() || nv.isGYearMonth() ) {
DateTimeStruct dts = parseAnyDT(nv) ;
return NodeValue.makeNode(dts.year, XSDDatatype.XSDinteger) ;
}
throw new ExprEvalException("Not a year datatype") ;
}
public static NodeValue dtGetMonth(NodeValue nv) {
if ( nv.isDateTime() || nv.isDate() || nv.isGYearMonth() || nv.isGMonth() || nv.isGMonthDay() ) {
DateTimeStruct dts = parseAnyDT(nv) ;
return NodeValue.makeNode(dts.month, XSDDatatype.XSDinteger) ;
}
throw new ExprEvalException("Not a month datatype") ;
}
public static NodeValue dtGetDay(NodeValue nv) {
if ( nv.isDateTime() || nv.isDate() || nv.isGMonthDay() || nv.isGDay() ) {
DateTimeStruct dts = parseAnyDT(nv) ;
return NodeValue.makeNode(dts.day, XSDDatatype.XSDinteger) ;
}
throw new ExprEvalException("Not a month datatype") ;
}
private static DateTimeStruct parseAnyDT(NodeValue nv) {
String lex = nv.asNode().getLiteralLexicalForm() ;
if ( nv.isDateTime() )
return DateTimeStruct.parseDateTime(lex) ;
if ( nv.isDate() )
return DateTimeStruct.parseDate(lex) ;
if ( nv.isGYear() )
return DateTimeStruct.parseGYear(lex) ;
if ( nv.isGYearMonth() )
return DateTimeStruct.parseGYearMonth(lex) ;
if ( nv.isGMonth() )
return DateTimeStruct.parseGMonth(lex) ;
if ( nv.isGMonthDay() )
return DateTimeStruct.parseGMonthDay(lex) ;
if ( nv.isGDay() )
return DateTimeStruct.parseGDay(lex) ;
if ( nv.isTime() )
return DateTimeStruct.parseTime(lex) ;
return null ;
}
private static DateTimeStruct parseTime(NodeValue nv) {
String lex = nv.asNode().getLiteralLexicalForm() ;
if ( nv.isDateTime() )
return DateTimeStruct.parseDateTime(lex) ;
else if ( nv.isTime() )
return DateTimeStruct.parseTime(lex) ;
else
throw new ExprEvalException("Not a datatype for time") ;
}
public static NodeValue dtGetHours(NodeValue nv) {
DateTimeStruct dts = parseTime(nv) ;
return NodeValue.makeNode(dts.hour, XSDDatatype.XSDinteger) ;
}
public static NodeValue dtGetMinutes(NodeValue nv) {
DateTimeStruct dts = parseTime(nv) ;
return NodeValue.makeNode(dts.minute, XSDDatatype.XSDinteger) ;
}
public static NodeValue dtGetSeconds(NodeValue nv) {
DateTimeStruct dts = parseTime(nv) ;
return NodeValue.makeNode(dts.second, XSDDatatype.XSDdecimal) ;
}
public static NodeValue dtGetTZ(NodeValue nv) {
DateTimeStruct dts = parseAnyDT(nv) ;
if ( dts == null )
throw new ExprEvalException("Not a data/time value: " + nv) ;
if ( dts.timezone == null )
return NodeValue.nvEmptyString ;
return NodeValue.makeString(dts.timezone) ;
}
public static NodeValue dtGetTimezone(NodeValue nv) {
DateTimeStruct dts = parseAnyDT(nv) ;
if ( dts == null || dts.timezone == null )
throw new ExprEvalException("Not a datatype with a timezone: " + nv) ;
if ( "".equals(dts.timezone) )
return null ;
if ( "Z".equals(dts.timezone) ) {
Node n = NodeFactory.createLiteral("PT0S", null, NodeFactory.getType(XSDDatatype.XSD + "#dayTimeDuration")) ;
return NodeValue.makeNode(n) ;
}
if ( "+00:00".equals(dts.timezone) ) {
Node n = NodeFactory.createLiteral("PT0S", null, NodeFactory.getType(XSDDatatype.XSD + "#dayTimeDuration")) ;
return NodeValue.makeNode(n) ;
}
if ( "-00:00".equals(dts.timezone) ) {
Node n = NodeFactory.createLiteral("-PT0S", null, NodeFactory.getType(XSDDatatype.XSD + "#dayTimeDuration")) ;
return NodeValue.makeNode(n) ;
}
String s = dts.timezone ;
int idx = 0 ;
StringBuilder sb = new StringBuilder() ;
if ( s.charAt(0) == '-' )
sb.append('-') ;
idx++ ; // Skip '-' or '+'
sb.append("PT") ;
digitsTwo(s, idx, sb, 'H') ;
idx += 2 ;
idx++ ; // The ":"
digitsTwo(s, idx, sb, 'M') ;
idx += 2 ;
return NodeValue.makeNode(sb.toString(), null, XSDDatatype.XSD + "#dayTimeDuration") ;
}
private static void digitsTwo(String s, int idx, StringBuilder sb, char indicator) {
if ( s.charAt(idx) == '0' ) {
idx++ ;
if ( s.charAt(idx) != '0' ) {
sb.append(s.charAt(idx)) ;
sb.append(indicator) ;
}
idx++ ;
} else {
sb.append(s.charAt(idx)) ;
idx++ ;
sb.append(s.charAt(idx)) ;
idx++ ;
sb.append(indicator) ;
}
}
public static boolean isYearMonth(Duration dur) {
// Not dur.getXMLSchemaType()
return (dur.isSet(YEARS) || dur.isSet(MONTHS)) && !dur.isSet(DAYS) && !dur.isSet(HOURS) && !dur.isSet(MINUTES)
&& !dur.isSet(SECONDS) ;
}
public static boolean isDayTime(Duration dur) {
return !dur.isSet(YEARS) && !dur.isSet(MONTHS)
&& (dur.isSet(DAYS) || dur.isSet(HOURS) || dur.isSet(MINUTES) || dur.isSet(SECONDS)) ;
}
public static NodeValue durGetYears(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.YEARS) ;
}
public static NodeValue durGetMonths(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.MONTHS) ;
}
public static NodeValue durGetDays(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.DAYS) ;
}
public static NodeValue durGetHours(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.HOURS) ;
}
public static NodeValue durGetMinutes(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.MINUTES) ;
}
public static NodeValue durGetSeconds(NodeValue nv) {
return accessDuration(nv, DatatypeConstants.SECONDS) ;
}
public static NodeValue durGetSign(NodeValue nv) {
int x = nv.getDuration().getSign() ;
return NodeValue.makeInteger(x) ;
}
private static NodeValue accessDuration(NodeValue nv, Field field) {
Duration dur = valueCanonicalDuration(nv) ;
// if ( ! nv.isDuration() )
// throw new ExprEvalException("Not a duration: "+nv) ;
Number x = dur.getField(field) ;
if ( x == null ) {
x = field.equals(DatatypeConstants.SECONDS)
? BigDecimal.ZERO
: BigInteger.ZERO ;
}
if ( field.equals(DatatypeConstants.SECONDS) )
return NodeValue.makeDecimal((BigDecimal)x) ;
return NodeValue.makeInteger((BigInteger)x) ;
}
private static Duration zeroDuration = NodeValue.xmlDatatypeFactory.newDuration(0) ;
private static Duration valueCanonicalDuration(NodeValue nv) {
// Unclear.
/* This semi-normalizes a duration value - the time part is normalized.
* Maybe > 24 hours -> set days, but not done here.
* Because months are variable, XSD F&O does not define
*/
// TODO - note that the accessors return 0 for unset fields.
Duration dur = nv.getDuration() ;
// Number xHours = dur.getField(DatatypeConstants.HOURS) ;
// Number xMins = dur.getField(DatatypeConstants.MINUTES) ;
// Number xSeconds = dur.getField(DatatypeConstants.SECONDS) ;
// boolean normalize =
// ( xHours == null || xHours.longValue() >= 24 ) ||
// ( xMins == null || xMins.longValue() >= 60 ) ||
// ( xSeconds == null || xSeconds.longValue() >= 60 ) ;
// if ( normalize )
// dur = ...
return dur ;
}
}