| /* |
| * 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.selectors; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.types.Parameter; |
| import org.apache.tools.ant.types.RegularExpression; |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.resources.FileResource; |
| import org.apache.tools.ant.types.resources.selectors.ResourceSelector; |
| import org.apache.tools.ant.util.regexp.Regexp; |
| |
| /** |
| * Selector that filters files based on a regular expression. |
| * |
| * @since Ant 1.6 |
| */ |
| public class ContainsRegexpSelector extends BaseExtendSelector |
| implements ResourceSelector { |
| |
| private String userProvidedExpression = null; |
| private RegularExpression myRegExp = null; |
| private Regexp myExpression = null; |
| /** Key to used for parameterized custom selector */ |
| public static final String EXPRESSION_KEY = "expression"; |
| |
| /** |
| * Creates a new <code>ContainsRegexpSelector</code> instance. |
| */ |
| public ContainsRegexpSelector() { |
| } |
| |
| /** |
| * @return a string describing this object |
| */ |
| public String toString() { |
| StringBuffer buf = new StringBuffer( |
| "{containsregexpselector expression: "); |
| buf.append(userProvidedExpression); |
| buf.append("}"); |
| return buf.toString(); |
| } |
| |
| /** |
| * The regular expression used to search the file. |
| * |
| * @param theexpression this must match a line in the file to be selected. |
| */ |
| public void setExpression(String theexpression) { |
| this.userProvidedExpression = theexpression; |
| } |
| |
| /** |
| * When using this as a custom selector, this method will be called. |
| * It translates each parameter into the appropriate setXXX() call. |
| * |
| * @param parameters the complete set of parameters for this selector |
| */ |
| public void setParameters(Parameter[] parameters) { |
| super.setParameters(parameters); |
| if (parameters != null) { |
| for (int i = 0; i < parameters.length; i++) { |
| String paramname = parameters[i].getName(); |
| if (EXPRESSION_KEY.equalsIgnoreCase(paramname)) { |
| setExpression(parameters[i].getValue()); |
| } else { |
| setError("Invalid parameter " + paramname); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Checks that an expression was specified. |
| * |
| */ |
| public void verifySettings() { |
| if (userProvidedExpression == null) { |
| setError("The expression attribute is required"); |
| } |
| } |
| |
| /** |
| * Tests a regular expression against each line of text in the file. |
| * |
| * @param basedir the base directory the scan is being done from |
| * @param filename is the name of the file to check |
| * @param file is a java.io.File object the selector can use |
| * @return whether the file should be selected or not |
| */ |
| public boolean isSelected(File basedir, String filename, File file) { |
| return isSelected(new FileResource(file)); |
| } |
| |
| /** |
| * Tests a regular expression against each line of text in a Resource. |
| * |
| * @param r the Resource to check. |
| * @return whether the Resource is selected or not |
| */ |
| public boolean isSelected(Resource r) { |
| String teststr = null; |
| BufferedReader in = null; |
| |
| // throw BuildException on error |
| |
| validate(); |
| |
| if (r.isDirectory()) { |
| return true; |
| } |
| |
| if (myRegExp == null) { |
| myRegExp = new RegularExpression(); |
| myRegExp.setPattern(userProvidedExpression); |
| myExpression = myRegExp.getRegexp(getProject()); |
| } |
| |
| try { |
| in = new BufferedReader(new InputStreamReader(r.getInputStream())); |
| } catch (Exception e) { |
| throw new BuildException("Could not get InputStream from " |
| + r.toLongString(), e); |
| } |
| try { |
| teststr = in.readLine(); |
| |
| while (teststr != null) { |
| |
| if (myExpression.matches(teststr)) { |
| return true; |
| } |
| teststr = in.readLine(); |
| } |
| |
| return false; |
| } catch (IOException ioe) { |
| throw new BuildException("Could not read " + r.toLongString()); |
| } finally { |
| try { |
| in.close(); |
| } catch (Exception e) { |
| throw new BuildException("Could not close " |
| + r.toLongString()); |
| } |
| } |
| } |
| } |
| |