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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
RegexpMatcher.java | 90% | 100% | 100% | 98% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.util;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.oro.text.regex.MalformedPatternException;
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import org.apache.oro.text.regex.MatchResult;
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import org.apache.oro.text.regex.Pattern;
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import org.apache.oro.text.regex.PatternCompiler;
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import org.apache.oro.text.regex.PatternMatcher;
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import org.apache.oro.text.regex.PatternMatcherInput;
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import org.apache.oro.text.regex.Perl5Compiler;
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import org.apache.oro.text.regex.Perl5Matcher;
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/**
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* Streamlines the interface to ORO by implicitly constructing the
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* necessary compilers and matchers, and by
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* caching compiled patterns.
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*
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* @author Howard Lewis Ship
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* @since 3.0
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*
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**/
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public class RegexpMatcher |
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{ |
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private PatternCompiler _patternCompiler;
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private PatternMatcher _matcher;
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private Map _compiledPatterns = new HashMap(); |
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private Map _escapedPatternStrings = new HashMap(); |
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protected Pattern compilePattern(String pattern)
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{ |
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if (_patternCompiler == null) |
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_patternCompiler = new Perl5Compiler();
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try
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{ |
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return _patternCompiler.compile(pattern, Perl5Compiler.SINGLELINE_MASK);
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} |
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catch (MalformedPatternException ex)
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{ |
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throw new ApplicationRuntimeException(ex); |
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} |
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} |
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protected Pattern getCompiledPattern(String pattern)
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{ |
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Pattern result = (Pattern) _compiledPatterns.get(pattern); |
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if (result == null) |
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{ |
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result = compilePattern(pattern); |
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_compiledPatterns.put(pattern, result); |
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} |
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return result;
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} |
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/**
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* Clears any previously compiled patterns.
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*
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**/
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public void clear() |
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{ |
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_compiledPatterns.clear(); |
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} |
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protected PatternMatcher getPatternMatcher()
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{ |
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if (_matcher == null) |
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_matcher = new Perl5Matcher();
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return _matcher;
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} |
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public boolean matches(String pattern, String input) |
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{ |
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Pattern compiledPattern = getCompiledPattern(pattern); |
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return getPatternMatcher().matches(input, compiledPattern);
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} |
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public boolean contains(String pattern, String input) |
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{ |
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Pattern compiledPattern = getCompiledPattern(pattern); |
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return getPatternMatcher().contains(input, compiledPattern);
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} |
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public String getEscapedPatternString(String pattern)
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{ |
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String result = (String) _escapedPatternStrings.get(pattern); |
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if (result == null) |
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{ |
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result = Perl5Compiler.quotemeta(pattern); |
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_escapedPatternStrings.put(pattern, result); |
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} |
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return result;
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} |
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/**
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* Given an input string, finds all matches in an input string for the pattern.
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*
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* @param pattern the regexp pattern for matching
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* @param input the string to search for matches within
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* @param subgroup the group (sub-expression) within the pattern to return as a match
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* @return array (possibly empty) of matching strings
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*
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*/
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public String[] getMatches(String pattern, String input, int subgroup) |
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{ |
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Pattern compiledPattern = getCompiledPattern(pattern); |
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PatternMatcher matcher = getPatternMatcher(); |
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PatternMatcherInput matcherInput = new PatternMatcherInput(input);
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List matches = new ArrayList();
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while (matcher.contains(matcherInput, compiledPattern))
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{ |
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MatchResult match = matcher.getMatch(); |
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String matchedInput = match.group(subgroup); |
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matches.add(matchedInput); |
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} |
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return (String[]) matches.toArray(new String[matches.size()]); |
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} |
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} |
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