com.google.gwt.logging.impl.StackTracePrintStream Maven / Gradle / Ivy
/*
* Copyright 2013 Google 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.google.gwt.logging.impl;
import java.io.FilterOutputStream;
import java.io.PrintStream;
/**
* A {@link PrintStream} implementation that implements only a subset of methods that is enough to
* be used with {@link Throwable#printStackTrace(PrintStream)}.
*
* Note that all implemented methods marked as final except two methods that are safe to be
* overridden by the subclasses: {@link #append(String)} {@link #newLine()}.
*/
public class StackTracePrintStream extends PrintStream {
private final StringBuilder builder;
public StackTracePrintStream(StringBuilder builder) {
super(new FilterOutputStream(null));
this.builder = builder;
}
/**
* Appends some text to the output.
*/
protected void append(String text) {
builder.append(text);
}
/**
* Appends a newline to the output.
*/
protected void newLine() {
builder.append("\n");
}
@Override
public final void print(Object obj) {
append(String.valueOf(obj));
}
@Override
public final void println(Object obj) {
append(String.valueOf(obj));
newLine();
}
@Override
public final void print(String str) {
append(str);
}
@Override
public final void println() {
newLine();
}
@Override
public final void println(String str) {
append(str);
newLine();
}
}