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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.taskdefs.optional.native2ascii;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.function.UnaryOperator;
import java.nio.file.Files;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.optional.Native2Ascii;
import org.apache.tools.ant.util.Native2AsciiUtils;
/**
* Encapsulates the built-in Native2Ascii implementation.
*
* @since Ant 1.9.8
*/
public class BuiltinNative2Ascii implements Native2AsciiAdapter {
static final String IMPLEMENTATION_NAME = "builtin";
@Override
public final boolean convert(Native2Ascii args, File srcFile,
File destFile) throws BuildException {
boolean reverse = args.getReverse();
String encoding = args.getEncoding();
try (BufferedReader input = getReader(srcFile, encoding, reverse);
Writer output = getWriter(destFile, encoding, reverse)) {
translate(input, output, reverse ? Native2AsciiUtils::ascii2native
: Native2AsciiUtils::native2ascii);
return true;
} catch (IOException ex) {
throw new BuildException("Exception trying to translate data", ex);
}
}
private BufferedReader getReader(File srcFile, String encoding,
boolean reverse) throws IOException {
if (!reverse && encoding != null) {
return new BufferedReader(new InputStreamReader(
Files.newInputStream(srcFile.toPath()), encoding));
}
return new BufferedReader(new FileReader(srcFile));
}
private Writer getWriter(File destFile, String encoding,
boolean reverse) throws IOException {
if (!reverse) {
encoding = "ASCII";
}
if (encoding != null) {
return new BufferedWriter(
new OutputStreamWriter(Files.newOutputStream(destFile.toPath()),
encoding));
}
return new BufferedWriter(new FileWriter(destFile));
}
private void translate(BufferedReader input, Writer output,
UnaryOperator<String> translation) throws IOException {
PrintWriter pw = new PrintWriter(output);
for (String line : (Iterable<String>) () -> input.lines()
.map(translation).iterator()) {
pw.println(line);
}
}
}
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