| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, and others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - improved comparison of xs:string with other XDM types |
| * Jesper S Moller - bug 286061 correct handling of quoted string |
| * Jesper S Moller - bug 280555 - Add pluggable collation support |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.types; |
| |
| import java.math.BigInteger; |
| |
| import org.eclipse.wst.xml.xpath2.api.DynamicContext; |
| import org.eclipse.wst.xml.xpath2.api.Item; |
| import org.eclipse.wst.xml.xpath2.api.ResultBuffer; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.api.typesystem.TypeDefinition; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpEq; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpGt; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpLt; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.FnCompare; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.builtin.BuiltinTypeLibrary; |
| |
| /** |
| * A representation of the String datatype |
| */ |
| public class XSString extends CtrType implements CmpEq, CmpGt, CmpLt { |
| |
| private static final String XS_STRING = "xs:string"; |
| private String _value; |
| |
| /** |
| * Initialises using the supplied String |
| * |
| * @param x |
| * The String to initialise to |
| */ |
| public XSString(String x) { |
| _value = x; |
| } |
| |
| /** |
| * Initialises to null |
| */ |
| public XSString() { |
| this(null); |
| } |
| |
| /** |
| * Retrieves the datatype's full pathname |
| * |
| * @return "xs:string" which is the datatype's full pathname |
| */ |
| public String string_type() { |
| return XS_STRING; |
| } |
| |
| /** |
| * Retrieves the datatype's name |
| * |
| * @return "string" which is the datatype's name |
| */ |
| public String type_name() { |
| return "string"; |
| } |
| |
| /** |
| * Retrieves a String representation of the string stored. This method is |
| * functionally identical to value() |
| * |
| * @return The String stored |
| */ |
| public String getStringValue() { |
| return _value; |
| } |
| |
| /** |
| * Retrieves a String representation of the string stored. This method is |
| * functionally identical to string_value() |
| * |
| * @return The String stored |
| */ |
| public String value() { |
| return getStringValue(); |
| } |
| |
| /** |
| * Creates a new ResultSequence consisting of the extractable String in the |
| * supplied ResultSequence |
| * |
| * @param arg |
| * The ResultSequence from which to extract the String |
| * @return New ResultSequence consisting of the supplied String |
| * @throws DynamicError |
| */ |
| public ResultSequence constructor(ResultSequence arg) throws DynamicError { |
| if (arg.empty()) |
| return ResultBuffer.EMPTY; |
| |
| //AnyAtomicType aat = (AnyAtomicType) arg.first(); |
| Item aat = arg.first(); |
| |
| return new XSString(aat.getStringValue()); |
| } |
| |
| // comparisons |
| |
| // 666 indicates death [compare returned empty seq] |
| private int do_compare(AnyType arg, DynamicContext dc) throws DynamicError { |
| |
| // XXX: This can't happen, I guess |
| if (arg == null) return 666; |
| |
| XSString comparand = arg instanceof XSString ? (XSString)arg : new XSString(arg.getStringValue()); |
| |
| BigInteger result = FnCompare.compare_string(dc.getCollationProvider().getDefaultCollation(), this, comparand, dc); |
| |
| return result.intValue(); |
| } |
| |
| /** |
| * Equality comparison between this and the supplied representation which |
| * must be of type String |
| * |
| * @param arg |
| * The representation to compare with |
| * @return True if the two representation are of the same String. False |
| * otherwise |
| * @throws DynamicError |
| */ |
| public boolean eq(AnyType arg, DynamicContext dynamicContext) throws DynamicError { |
| int cmp = do_compare(arg, dynamicContext); |
| |
| // XXX im not sure what to do here!!! because eq has to return |
| // something i fink.... |
| if (cmp == 666) |
| assert false; |
| |
| return cmp == 0; |
| } |
| |
| /** |
| * Comparison between this and the supplied representation which must be of |
| * type String |
| * |
| * @param arg |
| * The representation to compare with |
| * @return True if this String is lexographically greater than that |
| * supplied. False otherwise |
| * @throws DynamicError |
| */ |
| public boolean gt(AnyType arg, DynamicContext context) throws DynamicError { |
| int cmp = do_compare(arg, context); |
| |
| assert cmp != 666; |
| |
| return cmp > 0; |
| } |
| |
| /** |
| * Comparison between this and the supplied representation which must be of |
| * type String |
| * |
| * @param arg |
| * The representation to compare with |
| * @return True if this String is lexographically less than that supplied. |
| * False otherwise |
| * @throws DynamicError |
| */ |
| public boolean lt(AnyType arg, DynamicContext context) throws DynamicError { |
| int cmp = do_compare(arg, context); |
| |
| assert cmp != 666; |
| |
| return cmp < 0; |
| } |
| public TypeDefinition getTypeDefinition() { |
| return BuiltinTypeLibrary.XS_STRING; |
| } |
| |
| public Object getNativeValue() { |
| return _value; |
| } |
| |
| } |