/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.vfs;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
/**
* An abstract print writer.
*/
public abstract class AbstractPrintWriter extends PrintWriter {
private static final char []_trueChars = "true".toCharArray();
private static final char []_falseChars = "false".toCharArray();
private static final char []_nullChars = "null".toCharArray();
private static final Writer _dummyWriter = new StringWriter();
private final char []_tempCharBuffer = new char[64];
/**
* Creates the print writer.
*/
protected AbstractPrintWriter()
{
super(_dummyWriter);
}
/**
* Writes a character array to the writer.
*
* @param buf the buffer to write.
* @param off the offset into the buffer
* @param len the number of characters to write
*/
abstract public void write(char []buf, int offset, int length);
/**
* Writes a character to the output.
*
* @param buf the buffer to write.
*/
abstract public void write(int ch);
/**
* Writes a subsection of a string to the output.
*/
abstract public void write(String s, int off, int len);
/**
* Writes a char buffer to the output.
*
* @param buf the buffer to write.
*/
final public void write(char []buf)
{
write(buf, 0, buf.length);
}
/**
* Writes a string to the output.
*/
final public void write(String s)
{
write(s, 0, s.length());
}
/**
* Writes the newline character.
*/
public void newLine()
{
write('\n');
}
/**
* Prints a boolean.
*/
final public void print(boolean b)
{
write(b ? _trueChars : _falseChars);
}
/**
* Prints a character.
*/
public void print(char ch)
{
write(ch);
}
/**
* Prints an integer value.
*/
public void print(int i)
{
if (i == 0x80000000) {
print("-2147483648");
return;
}
if (i < 0) {
write('-');
i = -i;
} else if (i < 9) {
write('0' + i);
return;
}
int length = 0;
int exp = 10;
if (i >= 1000000000)
length = 9;
else {
for (; i >= exp; length++)
exp = 10 * exp;
}
int j = 31;
while (i > 0) {
_tempCharBuffer[--j] = (char) ((i % 10) + '0');
i /= 10;
}
write(_tempCharBuffer, j, 31 - j);
}
/**
* Prints a long value.
*/
public void print(long v)
{
if (v == 0x8000000000000000L) {
print("-9223372036854775808");
return;
}
if (v < 0) {
write('-');
v = -v;
} else if (v == 0) {
write('0');
return;
}
int j = 31;
while (v > 0) {
_tempCharBuffer[--j] = (char) ((v % 10) + '0');
v /= 10;
}
write(_tempCharBuffer, j, 31 - j);
}
final public void print(float f)
{
write(String.valueOf(f));
}
final public void print(double d)
{
write(String.valueOf(d));
}
/**
* Prints a character array
*/
final public void print(char []s)
{
write(s, 0, s.length);
}
/**
* Prints a string.
*/
final public void print(String s)
{
if (s == null)
write(_nullChars, 0, _nullChars.length);
else
write(s, 0, s.length());
}
/**
* Prints the value of the object.
*/
final public void print(Object v)
{
if (v == null)
write(_nullChars, 0, _nullChars.length);
else {
String s = v.toString();
write(s, 0, s.length());
}
}
/**
* Prints the newline.
*/
public void println()
{
write('\n');
}
/**
* Prints the boolean followed by a newline.
*
* @param v the value to print
*/
final public void println(boolean v)
{
print(v);
println();
}
/**
* Prints a character followed by a newline.
*
* @param v the value to print
*/
final public void println(char v)
{
print(v);
println();
}
/**
* Prints an integer followed by a newline.
*
* @param v the value to print
*/
final public void println(int v)
{
print(v);
println();
}
/**
* Prints a long followed by a newline.
*
* @param v the value to print
*/
final public void println(long v)
{
print(v);
println();
}
/**
* Prints a float followed by a newline.
*
* @param v the value to print
*/
final public void println(float v)
{
String s = String.valueOf(v);
write(s, 0, s.length());
println();
}
/**
* Prints a double followed by a newline.
*
* @param v the value to print
*/
final public void println(double v)
{
String s = String.valueOf(v);
write(s, 0, s.length());
println();
}
/**
* Writes a character array followed by a newline.
*/
final public void println(char []s)
{
write(s, 0, s.length);
println();
}
/**
* Writes a string followed by a newline.
*/
final public void println(String s)
{
if (s == null)
write(_nullChars, 0, _nullChars.length);
else
write(s, 0, s.length());
println();
}
/**
* Writes an object followed by a newline.
*/
final public void println(Object v)
{
if (v == null)
write(_nullChars, 0, _nullChars.length);
else {
String s = v.toString();
write(s, 0, s.length());
}
println();
}
}