/**
* 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 org.apache.solr.schema;
import org.apache.lucene.document.Fieldable;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.solr.common.SolrException;
import org.apache.solr.common.util.DateUtil;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.response.TextResponseWriter;
import org.apache.solr.response.XMLWriter;
import org.apache.solr.search.QParser;
import org.apache.solr.search.function.*;
import org.apache.solr.util.DateMathParser;
import java.io.IOException;
import java.text.*;
import java.util.*;
// TODO: make a FlexibleDateField that can accept dates in multiple
// formats, better for human entered dates.
// TODO: make a DayField that only stores the day?
/**
* FieldType that can represent any Date/Time with millisecond precision.
* <p>
* Date Format for the XML, incoming and outgoing:
* </p>
* <blockquote>
* A date field shall be of the form 1995-12-31T23:59:59Z
* The trailing "Z" designates UTC time and is mandatory
* (See below for an explanation of UTC).
* Optional fractional seconds are allowed, as long as they do not end
* in a trailing 0 (but any precision beyond milliseconds will be ignored).
* All other parts are mandatory.
* </blockquote>
* <p>
* This format was derived to be standards compliant (ISO 8601) and is a more
* restricted form of the
* <a href="http://www.w3.org/TR/xmlschema-2/#dateTime-canonical-representation">canonical
* representation of dateTime</a> from XML schema part 2. Examples...
* </p>
* <ul>
* <li>1995-12-31T23:59:59Z</li>
* <li>1995-12-31T23:59:59.9Z</li>
* <li>1995-12-31T23:59:59.99Z</li>
* <li>1995-12-31T23:59:59.999Z</li>
* </ul>
* <p>
* Note that DateField is lenient with regards to parsing fractional
* seconds that end in trailing zeros and will ensure that those values
* are indexed in the correct canonical format.
* </p>
* <p>
* This FieldType also supports incoming "Date Math" strings for computing
* values by adding/rounding internals of time relative either an explicit
* datetime (in the format specified above) or the literal string "NOW",
* ie: "NOW+1YEAR", "NOW/DAY", "1995-12-31T23:59:59.999Z+5MINUTES", etc...
* -- see {@link DateMathParser} for more examples.
* </p>
*
* <p>
* Explanation of "UTC"...
* </p>
* <blockquote>
* "In 1970 the Coordinated Universal Time system was devised by an
* international advisory group of technical experts within the International
* Telecommunication Union (ITU). The ITU felt it was best to designate a
* single abbreviation for use in all languages in order to minimize
* confusion. Since unanimous agreement could not be achieved on using
* either the English word order, CUT, or the French word order, TUC, the
* acronym UTC was chosen as a compromise."
* </blockquote>
*
* @version $Id: DateField.java 1071480 2011-02-17 02:23:10Z hossman $
* @see <a href="http://www.w3.org/TR/xmlschema-2/#dateTime">XML schema part 2</a>
*
*/
public class DateField extends FieldType {
public static TimeZone UTC = TimeZone.getTimeZone("UTC");
/* :TODO: let Locale/TimeZone come from init args for rounding only */
/** TimeZone for DateMath (UTC) */
protected static final TimeZone MATH_TZ = UTC;
/** Locale for DateMath (Locale.US) */
protected static final Locale MATH_LOCALE = Locale.US;
/**
* Fixed TimeZone (UTC) needed for parsing/formating Dates in the
* canonical representation.
*/
protected static final TimeZone CANONICAL_TZ = UTC;
/**
* Fixed Locale needed for parsing/formating Milliseconds in the
* canonical representation.
*/
protected static final Locale CANONICAL_LOCALE = Locale.US;
// The XML (external) date format will sort correctly, except if
// fractions of seconds are present (because '.' is lower than 'Z').
// The easiest fix is to simply remove the 'Z' for the internal
// format.
@Override
protected void init(IndexSchema schema, Map<String,String> args) {
}
protected static String NOW = "NOW";
protected static char Z = 'Z';
@Override
public String toInternal(String val) {
return toInternal(parseMath(null, val));
}
/**
* Parses a String which may be a date (in the standard format)
* followed by an optional math expression.
* @param now an optional fixed date to use as "NOW" in the DateMathParser
* @param val the string to parse
*/
public Date parseMath(Date now, String val) {
String math = null;
final DateMathParser p = new DateMathParser(MATH_TZ, MATH_LOCALE);
if (null != now) p.setNow(now);
if (val.startsWith(NOW)) {
math = val.substring(NOW.length());
} else {
final int zz = val.indexOf(Z);
if (0 < zz) {
math = val.substring(zz+1);
try {
// p.setNow(toObject(val.substring(0,zz)));
p.setNow(parseDate(val.substring(0,zz+1)));
} catch (ParseException e) {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date in Date Math String:'"
+val+'\'',e);
}
} else {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date String:'" +val+'\'');
}
}
if (null == math || math.equals("")) {
return p.getNow();
}
try {
return p.parseMath(math);
} catch (ParseException e) {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date Math String:'" +val+'\'',e);
}
}
public String toInternal(Date val) {
return formatDate(val);
}
@Override
public String indexedToReadable(String indexedForm) {
return indexedForm + Z;
}
@Override
public String toExternal(Fieldable f) {
return indexedToReadable(f.stringValue());
}
public Date toObject(String indexedForm) throws java.text.ParseException {
return parseDate(indexedToReadable(indexedForm));
}
@Override
public Date toObject(Fieldable f) {
try {
return parseDate( toExternal(f) );
}
catch( ParseException ex ) {
throw new RuntimeException( ex );
}
}
@Override
public SortField getSortField(SchemaField field,boolean reverse) {
return getStringSort(field,reverse);
}
@Override
public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
xmlWriter.writeDate(name, toExternal(f));
}
@Override
public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
writer.writeDate(name, toExternal(f));
}
/**
* Returns a formatter that can be use by the current thread if needed to
* convert Date objects to the Internal representation.
*
* Only the <tt>format(Date)</tt> can be used safely.
*
* @deprecated - use formatDate(Date) instead
*/
@Deprecated
protected DateFormat getThreadLocalDateFormat() {
return fmtThreadLocal.get();
}
/**
* Thread safe method that can be used by subclasses to format a Date
* using the Internal representation.
*/
protected String formatDate(Date d) {
return fmtThreadLocal.get().format(d);
}
/**
* Return the standard human readable form of the date
*/
public String toExternal(Date d) {
return fmtThreadLocal.get().format(d) + 'Z';
}
/**
* Thread safe method that can be used by subclasses to parse a Date
* that is already in the internal representation
*/
protected Date parseDate(String s) throws ParseException {
return fmtThreadLocal.get().parse(s);
}
/** Parse a date string in the standard format, or any supported by DateUtil.parseDate */
public Date parseDateLenient(String s, SolrQueryRequest req) throws ParseException {
// request could define timezone in the future
try {
return fmtThreadLocal.get().parse(s);
} catch (Exception e) {
return DateUtil.parseDate(s);
}
}
/**
* Parses a String which may be a date
* followed by an optional math expression.
* @param now an optional fixed date to use as "NOW" in the DateMathParser
* @param val the string to parse
*/
public Date parseMathLenient(Date now, String val, SolrQueryRequest req) {
String math = null;
final DateMathParser p = new DateMathParser(MATH_TZ, MATH_LOCALE);
if (null != now) p.setNow(now);
if (val.startsWith(NOW)) {
math = val.substring(NOW.length());
} else {
final int zz = val.indexOf(Z);
if (0 < zz) {
math = val.substring(zz+1);
try {
// p.setNow(toObject(val.substring(0,zz)));
p.setNow(parseDateLenient(val.substring(0,zz+1), req));
} catch (ParseException e) {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date in Date Math String:'"
+val+'\'',e);
}
} else {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date String:'" +val+'\'');
}
}
if (null == math || math.equals("")) {
return p.getNow();
}
try {
return p.parseMath(math);
} catch (ParseException e) {
throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date Math String:'" +val+'\'',e);
}
}
/**
* Thread safe DateFormat that can <b>format</b> in the canonical
* ISO8601 date format, not including the trailing "Z" (since it is
* left off in the internal indexed values)
*/
private final static ThreadLocalDateFormat fmtThreadLocal
= new ThreadLocalDateFormat(new ISO8601CanonicalDateFormat());
private static class ISO8601CanonicalDateFormat extends SimpleDateFormat {
protected NumberFormat millisParser
= NumberFormat.getIntegerInstance(CANONICAL_LOCALE);
protected NumberFormat millisFormat = new DecimalFormat(".###",
new DecimalFormatSymbols(CANONICAL_LOCALE));
public ISO8601CanonicalDateFormat() {
super("yyyy-MM-dd'T'HH:mm:ss", CANONICAL_LOCALE);
this.setTimeZone(CANONICAL_TZ);
}
@Override
public Date parse(String i, ParsePosition p) {
/* delegate to SimpleDateFormat for easy stuff */
Date d = super.parse(i, p);
int milliIndex = p.getIndex();
/* worry aboutthe milliseconds ourselves */
if (null != d &&
-1 == p.getErrorIndex() &&
milliIndex + 1 < i.length() &&
'.' == i.charAt(milliIndex)) {
p.setIndex( ++milliIndex ); // NOTE: ++ to chomp '.'
Number millis = millisParser.parse(i, p);
if (-1 == p.getErrorIndex()) {
int endIndex = p.getIndex();
d = new Date(d.getTime()
+ (long)(millis.doubleValue() *
Math.pow(10, (3-endIndex+milliIndex))));
}
}
return d;
}
@Override
public StringBuffer format(Date d, StringBuffer toAppendTo,
FieldPosition pos) {
/* delegate to SimpleDateFormat for easy stuff */
super.format(d, toAppendTo, pos);
/* worry aboutthe milliseconds ourselves */
long millis = d.getTime() % 1000l;
if (0l == millis) {
return toAppendTo;
}
int posBegin = toAppendTo.length();
toAppendTo.append(millisFormat.format(millis / 1000d));
if (DateFormat.MILLISECOND_FIELD == pos.getField()) {
pos.setBeginIndex(posBegin);
pos.setEndIndex(toAppendTo.length());
}
return toAppendTo;
}
@Override
public Object clone() {
ISO8601CanonicalDateFormat c
= (ISO8601CanonicalDateFormat) super.clone();
c.millisParser = NumberFormat.getIntegerInstance(CANONICAL_LOCALE);
c.millisFormat = new DecimalFormat(".###",
new DecimalFormatSymbols(CANONICAL_LOCALE));
return c;
}
}
private static class ThreadLocalDateFormat extends ThreadLocal<DateFormat> {
DateFormat proto;
public ThreadLocalDateFormat(DateFormat d) {
super();
proto = d;
}
@Override
protected DateFormat initialValue() {
return (DateFormat) proto.clone();
}
}
@Override
public ValueSource getValueSource(SchemaField field, QParser parser) {
field.checkFieldCacheSource(parser);
return new DateFieldSource(field.getName(), field.getType());
}
/** DateField specific range query */
public Query getRangeQuery(QParser parser, SchemaField sf, Date part1, Date part2, boolean minInclusive, boolean maxInclusive) {
return new TermRangeQuery(
sf.getName(),
part1 == null ? null : toInternal(part1),
part2 == null ? null : toInternal(part2),
minInclusive, maxInclusive);
}
}
class DateFieldSource extends FieldCacheSource {
// NOTE: this is bad for serialization... but we currently need the fieldType for toInternal()
FieldType ft;
public DateFieldSource(String name, FieldType ft) {
super(name);
this.ft = ft;
}
@Override
public String description() {
return "date(" + field + ')';
}
@Override
public DocValues getValues(Map context, IndexReader reader) throws IOException {
return new StringIndexDocValues(this, reader, field) {
@Override
protected String toTerm(String readableValue) {
// needed for frange queries to work properly
return ft.toInternal(readableValue);
}
@Override
public float floatVal(int doc) {
return (float)intVal(doc);
}
@Override
public int intVal(int doc) {
int ord=order[doc];
return ord;
}
@Override
public long longVal(int doc) {
return (long)intVal(doc);
}
@Override
public double doubleVal(int doc) {
return (double)intVal(doc);
}
@Override
public String strVal(int doc) {
int ord=order[doc];
return ft.indexedToReadable(lookup[ord]);
}
@Override
public String toString(int doc) {
return description() + '=' + intVal(doc);
}
};
}
@Override
public boolean equals(Object o) {
return o instanceof DateFieldSource
&& super.equals(o);
}
private static int hcode = DateFieldSource.class.hashCode();
@Override
public int hashCode() {
return hcode + super.hashCode();
};
}