feat(jdk8): move files to new folder to avoid resources compiled.
This commit is contained in:
260
jdkSrc/jdk8/com/sun/xml/internal/stream/writers/XMLWriter.java
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260
jdkSrc/jdk8/com/sun/xml/internal/stream/writers/XMLWriter.java
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/*
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* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.xml.internal.stream.writers;
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import java.io.IOException;
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import java.io.Writer;
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import com.sun.org.apache.xerces.internal.util.XMLStringBuffer;
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/**
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* XMLWriter
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*
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* <code>XMLWriter</code> is not thread safe.
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*
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* For efficiency this writer buffers the input. Use <code>flush()</code> function
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* to explicitly write the data to underlying stream.
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*
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* This writer is designed in such a way that it atleast buffers the input to the
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* <code>size</code> specified. Unless <code>flush</code> is called, it guarantees that
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* data in chunks of size equal to or more than <code>size</code> specified will be written.
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*
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*
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* <code>XMLWriter</code> instance can be reused. <code>setWriter()</code> internally clears the
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* buffer and stores the reference to newly supplied <code>Writer</code> instance.
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*
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* @author Neeraj Bajaj Sun Microsystems, inc.
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*/
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public class XMLWriter extends Writer {
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private Writer writer ;
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private int size ;
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//keep the size of internal buffer more than 'size' required to avoid resizing
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private XMLStringBuffer buffer = new XMLStringBuffer(6 * (1 << 11) ); // 6 KB
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private static final int THRESHHOLD_LENGTH = 1 << 12 ; // 4 KB
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private static final boolean DEBUG = false;
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/** Creates the instance of <code>XMLWriter</code>
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*/
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public XMLWriter(Writer writer){
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this(writer, THRESHHOLD_LENGTH);
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}
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/**
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* Creates the instnace of <code>XMLWriter</code>.
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*
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* atleast buffers the input to the
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* <code>size</code> specified.
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*/
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public XMLWriter(Writer writer, int size){
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this.writer = writer ;
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this.size = size;
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}
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/**
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* Write a single character. The character to be written is contained in
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* the 16 low-order bits of the given integer value; the 16 high-order bits
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* are ignored.
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*
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* <p> Subclasses that intend to support efficient single-character output
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* should override this method.
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*
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* @param c int specifying a character to be written.
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* @exception IOException If an I/O error occurs
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*/
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public void write(int c) throws IOException {
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ensureOpen();
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buffer.append((char)c);
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conditionalWrite();
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}
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/**
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* Write an array of characters.
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*
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* @param cbuf Array of characters to be written
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*
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* @exception IOException If an I/O error occurs
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*/
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public void write(char cbuf[]) throws IOException {
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write(cbuf, 0, cbuf.length);
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}
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/**
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* Write a portion of an array of characters.
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*
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* @param cbuf Array of characters
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* @param off Offset from which to start writing characters
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* @param len Number of characters to write
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*
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* @exception IOException If an I/O error occurs
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*/
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public void write(char cbuf[], int off, int len) throws IOException{
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ensureOpen();
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//optimization: if data size to be written is more than the 'size' specified,
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//do not buffer the data but write the data straight to the underlying stream
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if(len > size){
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//first write the data that may be present in the buffer
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writeBufferedData();
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//write directly to stream
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writer.write(cbuf, off, len);
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}else{
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buffer.append(cbuf, off, len);
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conditionalWrite();
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}
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}
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/**
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* Write a portion of a string.
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*
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* @param str A String
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* @param off Offset from which to start writing characters
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* @param len Number of characters to write
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*
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* @exception IOException If an I/O error occurs
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*/
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public void write(String str, int off, int len) throws IOException {
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write(str.toCharArray(), off, len);
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}
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/**
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* Write a string.
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*
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* @param str String to be written
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*
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* @exception IOException If an I/O error occurs
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*/
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public void write(String str) throws IOException {
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//optimization: if data size to be written is more than the 'size' specified,
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//do not buffer the data but write the data straight to the underlying stream - nb.
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if(str.length() > size){
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//first write the data that may be present in the buffer
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writeBufferedData();
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//write directly to stream
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writer.write(str);
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}else{
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buffer.append(str);
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conditionalWrite();
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}
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}
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/**
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* Close the stream, flushing it first. Once a stream has been closed,
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* further write() or flush() invocations will cause an IOException to be
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* thrown. Closing a previously-closed stream, however, has no effect.
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*
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* @exception IOException If an I/O error occurs
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*/
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public void close() throws IOException {
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if(writer == null) return;
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//flush it first
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flush();
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writer.close();
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writer = null ;
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}
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/**
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* Flush the stream. If the stream has saved any characters from the
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* various write() methods in a buffer, write them immediately to their
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* intended destination. Then, if that destination is another character or
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* byte stream, flush it. Thus one flush() invocation will flush all the
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* buffers in a chain of Writers and OutputStreams.
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*
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* @exception IOException If an I/O error occurs
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*/
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public void flush() throws IOException {
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ensureOpen();
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//write current data present in the buffer
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writeBufferedData();
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writer.flush();
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}
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/** Reset this Writer.
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*
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* see @setWriter()
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*/
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public void reset(){
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this.writer = null;
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buffer.clear();
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this.size = THRESHHOLD_LENGTH;
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}
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/**
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* Set the given <code>Writer</code>.
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*
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* @param Writer Writer.
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*/
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public void setWriter(Writer writer){
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this.writer = writer;
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buffer.clear();
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this.size = THRESHHOLD_LENGTH;
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}
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/** Set the given <code>Writer</code>
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*
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* @param Writer Writer.
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* @param int Writer will buffer the character data size, after that data is written to stream.
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*/
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public void setWriter(Writer writer, int size){
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this.writer = writer;
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this.size = size;
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}
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/**
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* Returns underlying <code>Writer</code>
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*/
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protected Writer getWriter() {
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return writer;
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}
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/** write the buffer data, if the buffer size has increased the size specified
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*/
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private void conditionalWrite() throws IOException {
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if(buffer.length > size){
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if(DEBUG){
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System.out.println("internal buffer length " + buffer.length + " increased size limit : " + size);
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System.out.println("Data: ('" + new String(buffer.ch, buffer.offset, buffer.length) + "')");
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}
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writeBufferedData();
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}
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}
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/** Write the data present in the buffer to the writer.
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* buffer is cleared after write operation.
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*/
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private void writeBufferedData() throws IOException {
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writer.write(buffer.ch, buffer.offset, buffer.length);
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buffer.clear();
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}
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/** Check to make sure that the stream has not been closed */
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private void ensureOpen() throws IOException {
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if (writer == null)throw new IOException("Stream closed");
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}
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}
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