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/*
* 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.Project;
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;
import org.apache.tools.ant.util.regexp.RegexpUtil;
/**
* 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;
private boolean caseSensitive = true;
private boolean multiLine = false;
private boolean singleLine = false;
/** Key to used for parameterized custom selector */
public static final String EXPRESSION_KEY = "expression";
/** Parameter name for the casesensitive attribute. */
private static final String CS_KEY = "casesensitive";
/** Parameter name for the multiline attribute. */
private static final String ML_KEY = "multiline";
/** Parameter name for the singleline attribute. */
private static final String SL_KEY = "singleline";
/**
* Creates a new <code>ContainsRegexpSelector</code> instance.
*/
public ContainsRegexpSelector() {
}
/**
* @return a string describing this object
*/
public String toString() {
StringBuilder buf = new StringBuilder(
"{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;
}
/**
* Whether to ignore case or not.
* @param b if false, ignore case.
* @since Ant 1.8.2
*/
public void setCaseSensitive(boolean b) {
caseSensitive = b;
}
/**
* Whether to match should be multiline.
* @param b the value to set.
* @since Ant 1.8.2
*/
public void setMultiLine(boolean b) {
multiLine = b;
}
/**
* Whether to treat input as singleline ('.' matches newline).
* Corresponds to java.util.regex.Pattern.DOTALL.
* @param b the value to set.
* @since Ant 1.8.2
*/
public void setSingleLine(boolean b) {
singleLine = b;
}
/**
* 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 if (CS_KEY.equalsIgnoreCase(paramname)) {
setCaseSensitive(Project
.toBoolean(parameters[i].getValue()));
} else if (ML_KEY.equalsIgnoreCase(paramname)) {
setMultiLine(Project.toBoolean(parameters[i].getValue()));
} else if (SL_KEY.equalsIgnoreCase(paramname)) {
setSingleLine(Project.toBoolean(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,
RegexpUtil.asOptions(caseSensitive,
multiLine,
singleLine))) {
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());
}
}
}
}
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