diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/regexp/Jdk14RegexpRegexp.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/regexp/Jdk14RegexpRegexp.java | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/regexp/Jdk14RegexpRegexp.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/regexp/Jdk14RegexpRegexp.java new file mode 100644 index 00000000..3ca80706 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/regexp/Jdk14RegexpRegexp.java @@ -0,0 +1,105 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ +package org.apache.tools.ant.util.regexp; + +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +import org.apache.tools.ant.BuildException; + +/*** + * Regular expression implementation using the JDK 1.4 regular expression package + */ +public class Jdk14RegexpRegexp extends Jdk14RegexpMatcher implements Regexp { + + private static final int DECIMAL = 10; + + /** Constructor for Jdk14RegexpRegexp */ + public Jdk14RegexpRegexp() { + super(); + } + + /** + * Convert ant regexp substitution option to jdk1.4 options. + * + * @param options the ant regexp options + * @return the jdk14 substition options + */ + protected int getSubsOptions(int options) { + int subsOptions = REPLACE_FIRST; + if (RegexpUtil.hasFlag(options, REPLACE_ALL)) { + subsOptions = REPLACE_ALL; + } + return subsOptions; + } + + /** + * Perform a substitution on the regular expression. + * @param input The string to substitute on + * @param argument The string which defines the substitution + * @param options The list of options for the match and replace. + * @return the result of the operation + * @throws BuildException on error + */ + public String substitute(String input, String argument, int options) + throws BuildException { + // translate \1 to $(1) so that the Matcher will work + StringBuffer subst = new StringBuffer(); + for (int i = 0; i < argument.length(); i++) { + char c = argument.charAt(i); + if (c == '$') { + subst.append('\\'); + subst.append('$'); + } else if (c == '\\') { + if (++i < argument.length()) { + c = argument.charAt(i); + int value = Character.digit(c, DECIMAL); + if (value > -1) { + subst.append("$").append(value); + } else { + subst.append(c); + } + } else { + // TODO - should throw an exception instead? + subst.append('\\'); + } + } else { + subst.append(c); + } + } + argument = subst.toString(); + + int sOptions = getSubsOptions(options); + Pattern p = getCompiledPattern(options); + StringBuffer sb = new StringBuffer(); + + Matcher m = p.matcher(input); + if (RegexpUtil.hasFlag(sOptions, REPLACE_ALL)) { + sb.append(m.replaceAll(argument)); + } else { + boolean res = m.find(); + if (res) { + m.appendReplacement(sb, argument); + m.appendTail(sb); + } else { + sb.append(input); + } + } + return sb.toString(); + } +} |