/*
* Copyright 2013-present Facebook, Inc.
*
* 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 com.facebook.buck.util;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Locale;
import javax.annotation.Nullable;
import javax.annotation.concurrent.GuardedBy;
/**
* Decorator of PrintStreams that tracks whether or not that stream has been written to. This is
* used to wrap stdout and stderr to track if anyone else but the class responsible for formatting
* output has written to stderr or stdout so we can abort output rendering.
*/
public class DirtyPrintStreamDecorator extends PrintStream {
private final PrintStream delegate;
@GuardedBy("delegate")
private volatile boolean dirty;
public DirtyPrintStreamDecorator(PrintStream delegate) {
super(delegate);
this.delegate = delegate;
this.dirty = false;
}
public PrintStream getRawStream() {
synchronized (delegate) {
return delegate;
}
}
public boolean isDirty() {
synchronized (delegate) {
return dirty;
}
}
@Override
public void write(int b) {
synchronized (delegate) {
dirty = true;
delegate.write(b);
}
}
@Override
public void write(byte[] b) throws IOException {
synchronized (delegate) {
dirty = true;
delegate.write(b);
}
}
@Override
public void write(byte[] buf, int off, int len) {
synchronized (delegate) {
dirty = true;
delegate.write(buf, off, len);
}
}
@Override
public void print(boolean b) {
synchronized (delegate) {
dirty = true;
delegate.print(b);
}
}
@Override
public void print(char c) {
synchronized (delegate) {
dirty = true;
delegate.print(c);
}
}
@Override
public void print(int i) {
synchronized (delegate) {
dirty = true;
delegate.print(i);
}
}
@Override
public void print(long l) {
synchronized (delegate) {
dirty = true;
delegate.print(l);
}
}
@Override
public void print(float f) {
synchronized (delegate) {
dirty = true;
delegate.print(f);
}
}
@Override
public void print(double d) {
synchronized (delegate) {
dirty = true;
delegate.print(d);
}
}
@Override
public void print(char[] s) {
synchronized (delegate) {
dirty = true;
delegate.print(s);
}
}
@Override
public void print(@Nullable String s) {
synchronized (delegate) {
dirty = true;
delegate.print(s);
}
}
@Override
public void print(Object obj) {
synchronized (delegate) {
dirty = true;
delegate.print(obj);
}
}
@Override
public void println() {
synchronized (delegate) {
dirty = true;
delegate.println();
}
}
@Override
public void println(boolean x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(char x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(int x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(long x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(float x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(double x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(char[] x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(String x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public void println(Object x) {
synchronized (delegate) {
dirty = true;
delegate.println(x);
}
}
@Override
public PrintStream printf(String format, Object... args) {
synchronized (delegate) {
dirty = true;
delegate.printf(format, args);
}
return this;
}
@Override
public PrintStream printf(Locale l, String format, Object... args) {
synchronized (delegate) {
dirty = true;
delegate.printf(l, format, args);
}
return this;
}
@Override
public PrintStream format(String format, Object... args) {
synchronized (delegate) {
dirty = true;
delegate.format(format, args);
}
return this;
}
@Override
public PrintStream format(Locale l, String format, Object... args) {
synchronized (delegate) {
dirty = true;
delegate.format(l, format, args);
}
return this;
}
@Override
public PrintStream append(CharSequence csq) {
synchronized (delegate) {
dirty = true;
delegate.append(csq);
}
return this;
}
@Override
public PrintStream append(CharSequence csq, int start, int end) {
synchronized (delegate) {
dirty = true;
delegate.append(csq, start, end);
}
return this;
}
@Override
public PrintStream append(char c) {
synchronized (delegate) {
dirty = true;
delegate.append(c);
}
return this;
}
}