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/*
* Copyright 2000-2005 The Apache Software Foundation
*
* 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 org.apache.tools.ant.taskdefs;
import java.io.File;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
/**
* Sets a token filter that is used by the file copy tasks
* to do token substitution. Sets multiple tokens by
* reading these from a file.
*
* @since Ant 1.1
*
* @ant.task category="filesystem"
*/
public class Filter extends Task {
private String token;
private String value;
private File filtersFile;
/**
* The token string without @ delimiters.
* @param token token to set
*/
public void setToken(String token) {
this.token = token;
}
/**
* The string that should replace the token during filtered copies.
* @param value token replace value
*/
public void setValue(String value) {
this.value = value;
}
/**
* The file from which the filters must be read.
* This file must be a formatted as a property file.
*
* @param filtersFile filter file
*/
public void setFiltersfile(File filtersFile) {
this.filtersFile = filtersFile;
}
/**
* Execute the task.
* @throws BuildException on error
*/
public void execute() throws BuildException {
boolean isFiltersFromFile =
filtersFile != null && token == null && value == null;
boolean isSingleFilter =
filtersFile == null && token != null && value != null;
if (!isFiltersFromFile && !isSingleFilter) {
throw new BuildException("both token and value parameters, or "
+ "only a filtersFile parameter is "
+ "required", getLocation());
}
if (isSingleFilter) {
getProject().getGlobalFilterSet().addFilter(token, value);
}
if (isFiltersFromFile) {
readFilters();
}
}
/**
* Read the filters.
* @throws BuildException on error
*/
protected void readFilters() throws BuildException {
log("Reading filters from " + filtersFile, Project.MSG_VERBOSE);
getProject().getGlobalFilterSet().readFiltersFromFile(filtersFile);
}
}
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