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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/RegularExpression.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/RegularExpression.java | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/RegularExpression.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/RegularExpression.java new file mode 100644 index 00000000..18ee3f1f --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/RegularExpression.java @@ -0,0 +1,141 @@ +/* + * 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.types; + +import org.apache.tools.ant.Project; +import org.apache.tools.ant.util.regexp.Regexp; +import org.apache.tools.ant.util.regexp.RegexpFactory; + +/** + * A regular expression datatype. Keeps an instance of the + * compiled expression for speed purposes. This compiled + * expression is lazily evaluated (it is compiled the first + * time it is needed). The syntax is the dependent on which + * regular expression type you are using. The system property + * "ant.regexp.regexpimpl" will be the classname of the implementation + * that will be used. + * + * <pre> + * Available implementations: + * + * org.apache.tools.ant.util.regexp.Jdk14RegexpRegexp (default) + * Based on the JDK's built-in regular expression package + * + * org.apache.tools.ant.util.regexp.JakartaOroRegexp + * Based on the jakarta-oro package + * + * org.apache.tools.ant.util.regexp.JakartaRegexpRegexp + * Based on the jakarta-regexp package + * </pre> + * + * <pre> + * <regexp [ [id="id"] pattern="expression" | refid="id" ] + * /> + * </pre> + * + * @see org.apache.oro.text.regex.Perl5Compiler + * @see org.apache.regexp.RE + * @see java.util.regex.Pattern + * + * @see org.apache.tools.ant.util.regexp.Regexp + * + * @ant.datatype name="regexp" + */ +public class RegularExpression extends DataType { + /** Name of this data type */ + public static final String DATA_TYPE_NAME = "regexp"; + private boolean alreadyInit = false; + + // The regular expression factory + private static final RegexpFactory FACTORY = new RegexpFactory(); + + private Regexp regexp = null; + // temporary variable + private String myPattern; + private boolean setPatternPending = false; + + /** + * default constructor + */ + public RegularExpression() { + } + + private void init(Project p) { + if (!alreadyInit) { + this.regexp = FACTORY.newRegexp(p); + alreadyInit = true; + } + } + private void setPattern() { + if (setPatternPending) { + regexp.setPattern(myPattern); + setPatternPending = false; + } + } + /** + * sets the regular expression pattern + * @param pattern regular expression pattern + */ + public void setPattern(String pattern) { + if (regexp == null) { + myPattern = pattern; + setPatternPending = true; + } else { + regexp.setPattern(pattern); + } + } + + /*** + * Gets the pattern string for this RegularExpression in the + * given project. + * @param p project + * @return pattern + */ + public String getPattern(Project p) { + init(p); + if (isReference()) { + return getRef(p).getPattern(p); + } + setPattern(); + return regexp.getPattern(); + } + + /** + * provides a reference to the Regexp contained in this + * @param p project + * @return Regexp instance associated with this RegularExpression instance + */ + public Regexp getRegexp(Project p) { + init(p); + if (isReference()) { + return getRef(p).getRegexp(p); + } + setPattern(); + return this.regexp; + } + + /*** + * Get the RegularExpression this reference refers to in + * the given project. Check for circular references too + * @param p project + * @return resolved RegularExpression instance + */ + public RegularExpression getRef(Project p) { + return (RegularExpression) getCheckedRef(p); + } +} |