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/*
* Copyright 2002-2004 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.condition;
import java.io.File;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.util.FileUtils;
/**
* Compares two files for bitwise equality based on size and
* content. Timestamps are not at all looked at.
*
* @author Steve Loughran
* @version $Revision$
* @since Ant 1.5
*/
public class FilesMatch implements Condition {
/**
* files to compare
*/
private File file1, file2;
/**
* Helper that provides the file comparison method.
*/
private FileUtils fu = FileUtils.newFileUtils();
/**
* Sets the File1 attribute
*
* @param file1 The new File1 value
*/
public void setFile1(File file1) {
this.file1 = file1;
}
/**
* Sets the File2 attribute
*
* @param file2 The new File2 value
*/
public void setFile2(File file2) {
this.file2 = file2;
}
/**
* comparison method of the interface
*
* @return true if the files are equal
* @exception BuildException if it all went pear-shaped
*/
public boolean eval()
throws BuildException {
//validate
if (file1 == null || file2 == null) {
throw new BuildException("both file1 and file2 are required in "
+ "filesmatch");
}
//#now match the files
boolean matches = false;
try {
matches = fu.contentEquals(file1, file2);
} catch (IOException ioe) {
throw new BuildException("when comparing files: "
+ ioe.getMessage(), ioe);
}
return matches;
}
}
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