org.apache.camel.component.as2.api.CanonicalOutputStream 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 org.apache.camel.component.as2.api;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class CanonicalOutputStream extends FilterOutputStream {
private static byte[] newline;
private int lastByte;
static {
newline = new byte[2];
newline[0] = (byte) '\r';
newline[1] = (byte) '\n';
}
private String charset;
public CanonicalOutputStream(OutputStream out, String charset) {
super(out);
this.charset = charset;
lastByte = -1;
}
@Override
public void write(int i) throws IOException {
if (i == '\r') {
// convert all carriage-return characters into line-break sequence
out.write(newline);
} else if (i == '\n') {
// convert line-feed character into line-break sequence if not
// preceded by carriage-return
if (lastByte != '\r') {
out.write(newline);
}
// otherwise the line-feed was preceded by carriage-return so ignore it.
} else {
out.write(i);
}
lastByte = i;
}
@Override
public void write(byte[] buf) throws IOException {
this.write(buf, 0, buf.length);
}
@Override
public void write(byte[] buf, int off, int len) throws IOException {
for (int i = off; i != off + len; i++) {
this.write(buf[i]);
}
}
public void writeln(String s) throws IOException {
byte[] bytes = s.getBytes(charset);
write(bytes);
write(newline);
}
public void writeln() throws IOException {
write(newline);
}
}