org.apache.catalina.connector.CoyoteWriter 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.catalina.connector;
import java.io.IOException;
import java.io.PrintWriter;
/**
* Coyote implementation of the servlet writer.
*
* @author Remy Maucherat
*/
public class CoyoteWriter
extends PrintWriter {
// -------------------------------------------------------------- Constants
// No need for a do privileged block - every web app has permission to read
// this by default
private static final char[] LINE_SEP =
System.getProperty("line.separator").toCharArray();
// ----------------------------------------------------- Instance Variables
protected OutputBuffer ob;
protected boolean error = false;
// ----------------------------------------------------------- Constructors
public CoyoteWriter(OutputBuffer ob) {
super(ob);
this.ob = ob;
}
// --------------------------------------------------------- Public Methods
/**
* Prevent cloning the facade.
*/
@Override
protected Object clone()
throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
// -------------------------------------------------------- Package Methods
/**
* Clear facade.
*/
void clear() {
ob = null;
}
/**
* Recycle.
*/
void recycle() {
error = false;
}
// --------------------------------------------------------- Writer Methods
@Override
public void flush() {
if (error)
return;
try {
ob.flush();
} catch (IOException e) {
error = true;
}
}
@Override
public void close() {
// We don't close the PrintWriter - super() is not called,
// so the stream can be reused. We close ob.
try {
ob.close();
} catch (IOException ex ) {
// Ignore
}
error = false;
}
@Override
public boolean checkError() {
flush();
return error;
}
@Override
public void write(int c) {
if (error)
return;
try {
ob.write(c);
} catch (IOException e) {
error = true;
}
}
@Override
public void write(char buf[], int off, int len) {
if (error)
return;
try {
ob.write(buf, off, len);
} catch (IOException e) {
error = true;
}
}
@Override
public void write(char buf[]) {
write(buf, 0, buf.length);
}
@Override
public void write(String s, int off, int len) {
if (error)
return;
try {
ob.write(s, off, len);
} catch (IOException e) {
error = true;
}
}
@Override
public void write(String s) {
write(s, 0, s.length());
}
// ---------------------------------------------------- PrintWriter Methods
@Override
public void print(boolean b) {
if (b) {
write("true");
} else {
write("false");
}
}
@Override
public void print(char c) {
write(c);
}
@Override
public void print(int i) {
write(String.valueOf(i));
}
@Override
public void print(long l) {
write(String.valueOf(l));
}
@Override
public void print(float f) {
write(String.valueOf(f));
}
@Override
public void print(double d) {
write(String.valueOf(d));
}
@Override
public void print(char s[]) {
write(s);
}
@Override
public void print(String s) {
if (s == null) {
s = "null";
}
write(s);
}
@Override
public void print(Object obj) {
write(String.valueOf(obj));
}
@Override
public void println() {
write(LINE_SEP);
}
@Override
public void println(boolean b) {
print(b);
println();
}
@Override
public void println(char c) {
print(c);
println();
}
@Override
public void println(int i) {
print(i);
println();
}
@Override
public void println(long l) {
print(l);
println();
}
@Override
public void println(float f) {
print(f);
println();
}
@Override
public void println(double d) {
print(d);
println();
}
@Override
public void println(char c[]) {
print(c);
println();
}
@Override
public void println(String s) {
print(s);
println();
}
@Override
public void println(Object o) {
print(o);
println();
}
}