/*
* Copyright 2000-2004 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.optional;
import java.io.File;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.Mapper;
import org.apache.tools.ant.util.FileNameMapper;
import org.apache.tools.ant.util.IdentityMapper;
import org.apache.tools.ant.util.SourceFileScanner;
/**
* Converts files from native encodings to ASCII.
*
* @author <a href="asudell@acm.org">Drew Sudell</a>
* @author Stefan Bodewig
* @since Ant 1.2
*/
public class Native2Ascii extends MatchingTask {
private boolean reverse = false; // convert from ascii back to native
private String encoding = null; // encoding to convert to/from
private File srcDir = null; // Where to find input files
private File destDir = null; // Where to put output files
private String extension = null; // Extension of output files if different
private Mapper mapper;
/**
* Flag the conversion to run in the reverse sense,
* that is Ascii to Native encoding.
*
* @param reverse True if the conversion is to be reversed,
* otherwise false;
*/
public void setReverse(boolean reverse) {
this.reverse = reverse;
}
/**
* Set the encoding to translate to/from.
* If unset, the default encoding for the JVM is used.
*
* @param encoding String containing the name of the Native
* encoding to convert from or to.
*/
public void setEncoding(String encoding) {
this.encoding = encoding;
}
/**
* Set the source directory in which to find files to convert.
*
* @param srcDir directory to find input file in.
*/
public void setSrc(File srcDir) {
this.srcDir = srcDir;
}
/**
* Set the destination directory to place converted files into.
*
* @param destDir directory to place output file into.
*/
public void setDest(File destDir) {
this.destDir = destDir;
}
/**
* Set the extension which converted files should have.
* If unset, files will not be renamed.
*
* @param ext File extension to use for converted files.
*/
public void setExt(String ext) {
this.extension = ext;
}
/**
* Defines the FileNameMapper to use (nested mapper element).
*
* @return the mapper to use for file name translations.
*
* @throws BuildException if more than one mapper is defined.
*/
public Mapper createMapper() throws BuildException {
if (mapper != null) {
throw new BuildException("Cannot define more than one mapper",
getLocation());
}
mapper = new Mapper(getProject());
return mapper;
}
/**
* Execute the task
*
* @throws BuildException is there is a problem in the task execution.
*/
public void execute() throws BuildException {
DirectoryScanner scanner = null; // Scanner to find our inputs
String[] files; // list of files to process
// default srcDir to basedir
if (srcDir == null) {
srcDir = getProject().resolveFile(".");
}
// Require destDir
if (destDir == null) {
throw new BuildException("The dest attribute must be set.");
}
// if src and dest dirs are the same, require the extension
// to be set, so we don't stomp every file. One could still
// include a file with the same extension, but ....
if (srcDir.equals(destDir) && extension == null && mapper == null) {
throw new BuildException("The ext attribute or a mapper must be set if"
+ " src and dest dirs are the same.");
}
FileNameMapper m = null;
if (mapper == null) {
if (extension == null) {
m = new IdentityMapper();
} else {
m = new ExtMapper();
}
} else {
m = mapper.getImplementation();
}
scanner = getDirectoryScanner(srcDir);
files = scanner.getIncludedFiles();
SourceFileScanner sfs = new SourceFileScanner(this);
files = sfs.restrict(files, srcDir, destDir, m);
int count = files.length;
if (count == 0) {
return;
}
String message = "Converting " + count + " file"
+ (count != 1 ? "s" : "") + " from ";
log(message + srcDir + " to " + destDir);
for (int i = 0; i < files.length; i++) {
convert(files[i], m.mapFileName(files[i])[0]);
}
}
/**
* Convert a single file.
*
* @param srcName name of the input file.
* @param destName name of the input file.
*/
private void convert(String srcName, String destName) throws BuildException {
Commandline cmd = new Commandline(); // Command line to run
File srcFile; // File to convert
File destFile; // where to put the results
// Set up the basic args (this could be done once, but
// it's cleaner here)
if (reverse) {
cmd.createArgument().setValue("-reverse");
}
if (encoding != null) {
cmd.createArgument().setValue("-encoding");
cmd.createArgument().setValue(encoding);
}
// Build the full file names
srcFile = new File(srcDir, srcName);
destFile = new File(destDir, destName);
cmd.createArgument().setFile(srcFile);
cmd.createArgument().setFile(destFile);
// Make sure we're not about to clobber something
if (srcFile.equals(destFile)) {
throw new BuildException("file " + srcFile
+ " would overwrite its self");
}
// Make intermediate directories if needed
// XXX JDK 1.1 doesn't have File.getParentFile,
String parentName = destFile.getParent();
if (parentName != null) {
File parentFile = new File(parentName);
if ((!parentFile.exists()) && (!parentFile.mkdirs())) {
throw new BuildException("cannot create parent directory "
+ parentName);
}
}
log("converting " + srcName, Project.MSG_VERBOSE);
sun.tools.native2ascii.Main n2a
= new sun.tools.native2ascii.Main();
if (!n2a.convert(cmd.getArguments())) {
throw new BuildException("conversion failed");
}
}
private class ExtMapper implements FileNameMapper {
public void setFrom(String s) {
}
public void setTo(String s) {
}
public String[] mapFileName(String fileName) {
int lastDot = fileName.lastIndexOf('.');
if (lastDot >= 0) {
return new String[] {fileName.substring(0, lastDot)
+ extension};
} else {
return new String[] {fileName + extension};
}
}
}
}