/* Copyright (c) 2001-2011, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
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* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.hsqldb.types;
import org.hsqldb.OpTypes;
import org.hsqldb.Session;
import org.hsqldb.SessionInterface;
import org.hsqldb.SortAndSlice;
import org.hsqldb.Tokens;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
/**
* Class for ROW type objects.<p>
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.2.9
* @since 2.0.0
*/
public class RowType extends Type {
final Type[] dataTypes;
TypedComparator comparator;
public RowType(Type[] dataTypes) {
super(Types.SQL_ROW, Types.SQL_ROW, 0, 0);
this.dataTypes = dataTypes;
}
public int displaySize() {
return 0;
}
public int getJDBCTypeCode() {
return Types.NULL;
}
public Class getJDBCClass() {
return java.sql.ResultSet.class;
}
public String getJDBCClassName() {
return "java.sql.ResultSet";
}
public int getJDBCScale() {
return 0;
}
public int getJDBCPrecision() {
return 0;
}
public int getSQLGenericTypeCode() {
return Types.SQL_ROW;
}
public boolean isRowType() {
return true;
}
public String getNameString() {
StringBuffer sb = new StringBuffer();
sb.append(Tokens.T_ROW);
sb.append('(');
for (int i = 0; i < dataTypes.length; i++) {
if (i > 0) {
sb.append(',');
}
sb.append(dataTypes[i].getDefinition());
}
sb.append(')');
return sb.toString();
}
public String getDefinition() {
return getNameString();
}
public int compare(Session session, Object a, Object b) {
if (a == b) {
return 0;
}
if (a == null) {
return -1;
}
if (b == null) {
return 1;
}
Object[] arra = (Object[]) a;
Object[] arrb = (Object[]) b;
int length = arra.length;
if (arrb.length < length) {
length = arrb.length;
}
for (int i = 0; i < length; i++) {
int result = dataTypes[i].compare(session, arra[i], arrb[i]);
if (result != 0) {
return result;
}
}
if (arra.length > arrb.length) {
return 1;
} else if (arra.length < arrb.length) {
return -1;
}
return 0;
}
public Object convertToTypeLimits(SessionInterface session, Object a) {
if (a == null) {
return null;
}
Object[] arra = (Object[]) a;
Object[] arrb = new Object[arra.length];
for (int i = 0; i < arra.length; i++) {
arrb[i] = dataTypes[i].convertToTypeLimits(session, arra[i]);
}
return arrb;
}
public Object convertToType(SessionInterface session, Object a,
Type otherType) {
if (a == null) {
return null;
}
if (otherType == null) {
return a;
}
if (!otherType.isRowType()) {
throw Error.error(ErrorCode.X_42562);
}
Type[] otherTypes = ((RowType) otherType).getTypesArray();
if (dataTypes.length != otherTypes.length) {
throw Error.error(ErrorCode.X_42564);
}
Object[] arra = (Object[]) a;
Object[] arrb = new Object[arra.length];
for (int i = 0; i < arra.length; i++) {
arrb[i] = dataTypes[i].convertToType(session, arra[i],
otherTypes[i]);
}
return arrb;
}
public Object convertToDefaultType(SessionInterface sessionInterface,
Object o) {
return o;
}
public String convertToString(Object a) {
if (a == null) {
return null;
}
return convertToSQLString(a);
}
public String convertToSQLString(Object a) {
if (a == null) {
return Tokens.T_NULL;
}
Object[] array = (Object[]) a;
StringBuffer sb = new StringBuffer();
sb.append(Tokens.T_ROW);
sb.append('(');
for (int i = 0; i < array.length; i++) {
if (i > 0) {
sb.append(',');
}
String string = dataTypes[i].convertToSQLString(array[i]);
sb.append(string);
}
sb.append(')');
return sb.toString();
}
public boolean canConvertFrom(Type otherType) {
if (otherType == null) {
return true;
}
if (!otherType.isRowType()) {
return false;
}
Type[] otherTypes = ((RowType) otherType).getTypesArray();
if (dataTypes.length != otherTypes.length) {
return false;
}
for (int i = 0; i < dataTypes.length; i++) {
if (!dataTypes[i].canConvertFrom(otherTypes[i])) {
return false;
}
}
return true;
}
public boolean canBeAssignedFrom(Type otherType) {
if (otherType == null) {
return true;
}
if (!otherType.isRowType()) {
return false;
}
Type[] otherTypes = ((RowType) otherType).getTypesArray();
if (dataTypes.length != otherTypes.length) {
return false;
}
for (int i = 0; i < dataTypes.length; i++) {
if (!dataTypes[i].canBeAssignedFrom(otherTypes[i])) {
return false;
}
}
return true;
}
public Type getAggregateType(Type other) {
if (other == null) {
return this;
}
if (other == SQL_ALL_TYPES) {
return this;
}
if (other == this) {
return this;
}
if (!other.isRowType()) {
throw Error.error(ErrorCode.X_42562);
}
Type[] newTypes = new Type[dataTypes.length];
Type[] otherTypes = ((RowType) other).getTypesArray();
if (dataTypes.length != otherTypes.length) {
throw Error.error(ErrorCode.X_42564);
}
for (int i = 0; i < dataTypes.length; i++) {
newTypes[i] = dataTypes[i].getAggregateType(otherTypes[i]);
}
return new RowType(newTypes);
}
public Type getCombinedType(Session session, Type other, int operation) {
if (operation != OpTypes.CONCAT) {
return getAggregateType(other);
}
if (other == null) {
return this;
}
if (!other.isRowType()) {
throw Error.error(ErrorCode.X_42562);
}
Type[] newTypes = new Type[dataTypes.length];
Type[] otherTypes = ((RowType) other).getTypesArray();
if (dataTypes.length != otherTypes.length) {
throw Error.error(ErrorCode.X_42564);
}
for (int i = 0; i < dataTypes.length; i++) {
newTypes[i] = dataTypes[i].getAggregateType(otherTypes[i]);
}
return new RowType(newTypes);
}
public Type[] getTypesArray() {
return dataTypes;
}
public int compare(Session session, Object a, Object b,
SortAndSlice sort) {
if (a == b) {
return 0;
}
// not related to sort
if (a == null) {
return -1;
}
if (b == null) {
return 1;
}
Object[] arra = (Object[]) a;
Object[] arrb = (Object[]) b;
int length = sort.sortOrder.length;
for (int i = 0; i < length; i++) {
a = arra[sort.sortOrder[i]];
b = arrb[sort.sortOrder[i]];
if (a == b) {
continue;
}
if (sort.sortNullsLast[i]) {
if (a == null) {
return 1;
}
if (b == null) {
return -1;
}
}
int result = dataTypes[i].compare(session, a, b);
if (result != 0) {
if (sort.sortDescending[i]) {
return -result;
}
return result;
}
}
return 0;
}
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (other instanceof Type) {
if (((Type) other).typeCode != Types.SQL_ROW) {
return false;
}
Type[] otherTypes = ((RowType) other).dataTypes;
if (otherTypes.length != dataTypes.length) {
return false;
}
for (int i = 0; i < dataTypes.length; i++) {
if (!dataTypes[i].equals(otherTypes[i])) {
return false;
}
return true;
}
}
return false;
}
public int hashCode(Object a) {
if (a == null) {
return 0;
}
int hash = 0;
Object[] array = (Object[]) a;
for (int i = 0; i < dataTypes.length && i < 4; i++) {
hash += dataTypes[i].hashCode(array[i]);
}
return hash;
}
synchronized TypedComparator getComparator(Session session) {
if (comparator == null) {
TypedComparator c = Type.newComparator(session);
SortAndSlice sort = new SortAndSlice();
sort.prepareMultiColumn(dataTypes.length);
c.setType(this, sort);
comparator = c;
}
return comparator;
}
public static String convertToSQLString(Object[] array, Type[] types,
int maxUnitLength) {
if (array == null) {
return Tokens.T_NULL;
}
StringBuffer sb = new StringBuffer();
sb.append('(');
for (int i = 0; i < array.length; i++) {
String value;
if (i > 0) {
sb.append(',');
}
String string = types[i].convertToSQLString(array[i]);
if (maxUnitLength > 10 && string.length() > maxUnitLength) {
sb.append(string.substring(0, maxUnitLength - 4));
sb.append(" ...");
} else {
sb.append(string);
}
}
sb.append(')');
return sb.toString();
}
}