| /******************************************************************************* |
| * 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 - bug274784 - improvements to xs:boolean data type implementation |
| * David Carver - bug 282223 - corrected casting to boolean. |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.types; |
| |
| import org.eclipse.wst.xml.xpath2.api.typesystem.TypeDefinition; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicContext; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.processor.ResultSequenceFactory; |
| 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.types.builtin.BuiltinTypeLibrary; |
| |
| /** |
| * A representation of a true or a false value. |
| */ |
| public class XSBoolean extends CtrType implements CmpEq, CmpGt, CmpLt { |
| private static final String XS_BOOLEAN = "xs:boolean"; |
| public static final XSBoolean TRUE = new XSBoolean(true); |
| public static final XSBoolean FALSE = new XSBoolean(false); |
| private boolean _value; |
| |
| /** |
| * Initiates the new representation to the boolean supplied |
| * |
| * @param x |
| * Initializes this datatype to represent this boolean |
| */ |
| public XSBoolean(boolean x) { |
| _value = x; |
| } |
| |
| /** |
| * Initiates to a default representation of false. |
| */ |
| public XSBoolean() { |
| this(false); |
| } |
| |
| /** |
| * Retrieve the full type pathname of this datatype |
| * |
| * @return "xs:boolean", the full datatype pathname |
| */ |
| public String string_type() { |
| return XS_BOOLEAN; |
| } |
| |
| @Override |
| public Object getNativeValue() { |
| return Boolean.valueOf(_value); |
| } |
| |
| /** |
| * Retrieve the datatype name |
| * |
| * @return "boolean", which is the datatype name. |
| */ |
| public String type_name() { |
| return "boolean"; |
| } |
| |
| /** |
| * Retrieve the String representation of the boolean value stored |
| * |
| * @return the String representation of the boolean value stored |
| */ |
| public String string_value() { |
| return "" + _value; |
| } |
| |
| /** |
| * Retrieves the actual boolean value stored |
| * |
| * @return the actual boolean value stored |
| */ |
| public boolean value() { |
| return _value; |
| } |
| |
| /** |
| * Creates a new result sequence consisting of the retrievable boolean value |
| * in the supplied result sequence |
| * |
| * @param arg |
| * The result sequence from which to extract the boolean value. |
| * @throws DynamicError |
| * @return A new result sequence consisting of the boolean value supplied. |
| */ |
| public ResultSequence constructor(ResultSequence arg) throws DynamicError { |
| ResultSequence rs = ResultSequenceFactory.create_new(); |
| |
| if (arg.empty()) |
| return rs; |
| |
| AnyType anyType = arg.first(); |
| |
| if (anyType instanceof XSDuration || anyType instanceof CalendarType || |
| anyType instanceof XSBase64Binary || anyType instanceof XSHexBinary || |
| anyType instanceof XSAnyURI) { |
| throw DynamicError.invalidType(); |
| } |
| |
| String str_value = anyType.string_value(); |
| |
| |
| if (!(isCastable(anyType, str_value))) { |
| throw DynamicError.cant_cast(null); |
| } |
| |
| Boolean b = null; |
| if (isFalse(str_value)) { |
| b = Boolean.FALSE; |
| } |
| else { |
| b = Boolean.TRUE; |
| } |
| |
| rs.add(new XSBoolean(b.booleanValue())); |
| |
| return rs; |
| } |
| |
| private boolean isFalse(String str_value) { |
| return str_value.equals("0") || str_value.equals("false") || |
| str_value.equals("+0") || str_value.equals("-0") || |
| str_value.equals("0.0E0") || str_value.equals("NaN"); |
| } |
| |
| private boolean isCastable(AnyType anyType, String str_value) { |
| return str_value.equals("0") || str_value.equals("1") || |
| str_value.equals("true") || str_value.equals("false") || |
| anyType instanceof NumericType; |
| } |
| |
| // comparisons |
| /** |
| * Comparison for equality between the supplied and this boolean |
| * representation. Returns true if both represent same boolean value, false |
| * otherwise |
| * |
| * @param arg |
| * The XSBoolean representation of the boolean value to compare |
| * with. |
| * @throws DynamicError |
| * @return New XSBoolean representation of true/false result of the equality |
| * comparison |
| */ |
| public boolean eq(AnyType arg, DynamicContext context) throws DynamicError { |
| XSBoolean barg = (XSBoolean) NumericType.get_single_type(arg, |
| XSBoolean.class); |
| |
| return value() == barg.value(); |
| } |
| |
| /** |
| * Comparison between the supplied and this boolean representation. Returns |
| * true if this XSBoolean represents true and that XSBoolean supplied |
| * represents false. Returns false otherwise |
| * |
| * @param arg |
| * The XSBoolean representation of the boolean value to compare |
| * with. |
| * @throws DynamicError |
| * @return New XSBoolean representation of true/false result of the |
| * comparison |
| */ |
| public boolean gt(AnyType arg, DynamicContext context) throws DynamicError { |
| XSBoolean barg = (XSBoolean) NumericType.get_single_type(arg, |
| XSBoolean.class); |
| |
| boolean result = false; |
| |
| if (value() && !barg.value()) |
| result = true; |
| return result; |
| } |
| |
| /** |
| * Comparison between the supplied and this boolean representation. Returns |
| * true if this XSBoolean represents false and that XSBoolean supplied |
| * represents true. Returns false otherwise |
| * |
| * @param arg |
| * The XSBoolean representation of the boolean value to compare |
| * with. |
| * @throws DynamicError |
| * @return New XSBoolean representation of true/false result of the |
| * comparison |
| */ |
| public boolean lt(AnyType arg, DynamicContext context) throws DynamicError { |
| XSBoolean barg = (XSBoolean) NumericType.get_single_type(arg, |
| XSBoolean.class); |
| |
| boolean result = false; |
| |
| if (!value() && barg.value()) |
| result = true; |
| return result; |
| } |
| |
| public TypeDefinition getTypeDefinition() { |
| return BuiltinTypeLibrary.XS_BOOLEAN; |
| } |
| |
| public static org.eclipse.wst.xml.xpath2.api.ResultSequence valueOf( |
| boolean answer) { |
| return answer ? TRUE : FALSE; |
| } |
| |
| } |