groovy.io.PlatformLineWriter Maven / Gradle / Ivy
/*
* 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 groovy.io;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;
/**
* A buffered writer that gobbles any \r characters
* and replaces every \n with a platform specific newline.
* In many places Groovy normalises streams to only have \n
* characters but when creating files that must be used
* by other platform-aware tools, you sometimes want the
* newlines to match what the platform expects.
*
* @author Paul King
*/
public class PlatformLineWriter extends Writer {
private BufferedWriter writer;
public PlatformLineWriter(Writer out) {
writer = new BufferedWriter(out);
}
public PlatformLineWriter(Writer out, int sz) {
writer = new BufferedWriter(out, sz);
}
public void write(char cbuf[], int off, int len) throws IOException {
for (; len > 0; len--) {
char c = cbuf[off++];
if (c == '\n') {
writer.newLine();
} else if (c != '\r') {
writer.write(c);
}
}
}
public void flush() throws IOException {
writer.flush();
}
public void close() throws IOException {
writer.close();
}
}