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/*
* Copyright (c) 2001-2004 Ant-Contrib project. All rights reserved.
*
* Licensed 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 net.sf.antcontrib.property;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.RegularExpression;
import org.apache.tools.ant.types.Substitution;
import org.apache.tools.ant.util.regexp.Regexp;
/****************************************************************************
* Place class description here.
*
* @author <a href='mailto:mattinger@yahoo.com'>Matthew Inger</a>
* @author <additional author>
*
* @since
*
****************************************************************************/
public class RegexTask
extends AbstractPropertySetterTask
{
private String input;
private RegularExpression regexp;
private String select;
private Substitution replace;
private String defaultValue;
private boolean caseSensitive = true;
private boolean global = true;
public RegexTask()
{
super();
}
public void setInput(String input)
{
this.input = input;
}
public void setDefaultValue(String defaultValue)
{
this.defaultValue = defaultValue;
}
public void setRegexp(String regex)
{
if (this.regexp != null)
throw new BuildException("Cannot specify more than one regular expression");
this.regexp = new RegularExpression();
this.regexp.setPattern(regex);
}
public RegularExpression createRegexp()
{
if (this.regexp != null)
throw new BuildException("Cannot specify more than one regular expression");
regexp = new RegularExpression();
return regexp;
}
public void setReplace(String replace)
{
if (this.replace != null)
throw new BuildException("Cannot specify more than one replace expression");
if (select != null)
throw new BuildException("You cannot specify both a select and replace expression");
this.replace = new Substitution();
this.replace.setExpression(replace);
}
public Substitution createReplace()
{
if (replace != null)
throw new BuildException("Cannot specify more than one replace expression");
if (select != null)
throw new BuildException("You cannot specify both a select and replace expression");
replace = new Substitution();
return replace;
}
public void setSelect(String select)
{
if (replace != null)
throw new BuildException("You cannot specify both a select and replace expression");
this.select = select;
}
public void setCaseSensitive(boolean caseSensitive)
{
this.caseSensitive = caseSensitive;
}
public void setGlobal(boolean global)
{
this.global = global;
}
protected String doReplace()
throws BuildException
{
if (replace == null)
throw new BuildException("No replace expression specified.");
int options = 0;
if (! caseSensitive)
options |= Regexp.MATCH_CASE_INSENSITIVE;
if (global)
options |= Regexp.REPLACE_ALL;
Regexp sregex = regexp.getRegexp(project);
String output = null;
if (sregex.matches(input, options)) {
String expression = replace.getExpression(project);
output = sregex.substitute(input,
expression,
options);
}
if (output == null)
output = defaultValue;
return output;
}
protected String doSelect()
throws BuildException
{
int options = 0;
if (! caseSensitive)
options |= Regexp.MATCH_CASE_INSENSITIVE;
Regexp sregex = regexp.getRegexp(project);
String output = select;
Vector groups = sregex.getGroups(input, options);
if (groups != null && groups.size() > 0)
{
output = RegexUtil.select(select, groups);
}
else
{
output = null;
}
if (output == null)
output = defaultValue;
return output;
}
protected void validate()
{
super.validate();
if (regexp == null)
throw new BuildException("No match expression specified.");
if (replace == null && select == null)
throw new BuildException("You must specify either a replace or select expression");
}
public void execute()
throws BuildException
{
validate();
String output = input;
if (replace != null)
output = doReplace();
else
output = doSelect();
if (output != null)
setPropertyValue(output);
}
}
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