| /******************************************************************************* |
| * 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 |
| * David Carver - bug 282096 - improvements for surrogate handling |
| * David Carver - bug 262765 - improvements to Regular Expression |
| * Jesper Steen Moeller - bug 282096 - clean up string storage |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.function; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.regex.PatternSyntaxException; |
| |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.internal.SeqType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.QName; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSBoolean; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSString; |
| |
| /** |
| * The function returns true if $input matches the regular expression supplied |
| * as $pattern as influenced by the value of $flags, if present; otherwise, it |
| * returns false. |
| */ |
| public class FnMatches extends AbstractRegExFunction { |
| private static Collection _expected_args = null; |
| |
| /** |
| * Constructor for FnMatches. |
| */ |
| public FnMatches() { |
| super(new QName("matches"), 2, 3); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| public ResultSequence evaluate(Collection args, org.eclipse.wst.xml.xpath2.api.EvaluationContext ec) throws DynamicError { |
| return matches(args); |
| } |
| |
| /** |
| * Matches operation. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of fn:matches operation. |
| */ |
| public static ResultSequence matches(Collection args) throws DynamicError { |
| Collection cargs = Function.convert_arguments(args, expected_args()); |
| |
| // get args |
| Iterator argiter = cargs.iterator(); |
| ResultSequence arg1 = (ResultSequence) argiter.next(); |
| String str1 = ""; |
| if (!arg1.empty()) { |
| str1 = ((XSString) arg1.first()).value(); |
| } |
| |
| ResultSequence arg2 = (ResultSequence) argiter.next(); |
| String pattern = ((XSString) arg2.first()).value(); |
| String flags = null; |
| |
| if (argiter.hasNext()) { |
| ResultSequence flagRS = null; |
| flagRS = (ResultSequence) argiter.next(); |
| flags = flagRS.first().getStringValue(); |
| if (validflags.indexOf(flags) == -1 && flags.length() > 0 ) { |
| throw DynamicError.regex_flags_error(null); |
| } |
| } |
| |
| try { |
| boolean result = false; |
| result = matches(pattern, flags, str1); |
| return XSBoolean.valueOf(result); |
| } catch (PatternSyntaxException pex) { |
| throw DynamicError.regex_error(pex.getMessage()); |
| } |
| } |
| |
| |
| /** |
| * Obtain a list of expected arguments. |
| * |
| * @return Result of operation. |
| */ |
| public synchronized static Collection expected_args() { |
| if (_expected_args == null) { |
| _expected_args = new ArrayList(); |
| SeqType arg = new SeqType(new XSString(), SeqType.OCC_QMARK); |
| _expected_args.add(arg); |
| _expected_args.add(new SeqType(new XSString(), SeqType.OCC_NONE)); |
| _expected_args.add(new SeqType(new XSString(), SeqType.OCC_NONE)); |
| } |
| |
| return _expected_args; |
| } |
| } |