/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
/*
** $Id: StringReader.java,v 1.3 2006/10/04 14:24:15 cvsroot Exp $
*/
package java.io;
public class StringReader extends Reader {
private String string;
private int len;
private int pos;
private int markpos;
public StringReader(String str){
super();
len = str.length();
string = str;
}
public void close(){
synchronized(lock){
string = null;
}
}
public void mark(int ignored) throws IOException {
synchronized(lock){
if(string == null){
throw new IOException("Reader is closed");
}
markpos = pos;
}
}
public boolean markSupported(){
return true;
}
public int read() throws IOException {
synchronized(lock){
if(string == null){
throw new IOException("Reader is closed");
}
if(pos >= len){
return -1;
}
return string.charAt(pos++);
}
}
public int read(char[] chars, int off, int len) throws IOException {
synchronized(lock){
if(string == null){
throw new IOException("Reader is closed");
}
if(len < 0 || off < 0 || chars.length - len < off){
throw new ArrayIndexOutOfBoundsException();
}
int rd = this.len - pos;
if (rd <= 0){
return -1;
}
rd = (rd > len ? len : rd);
string.getChars(pos, pos + rd, chars, off);
pos += rd;
return rd;
}
}
public boolean ready() throws IOException {
synchronized(lock){
return (string != null);
}
}
public void reset() throws IOException {
synchronized(lock){
if(string == null){
throw new IOException("Reader is closed");
}
pos = markpos;
}
}
public long skip(long skip) throws IOException {
synchronized(lock){
if(string == null){
throw new IOException("Reader is closed");
}
if(skip <= 0){
return 0;
}
int rd = this.len -pos;
rd = (skip > rd ? rd : (int)skip);
pos += rd;
return rd;
}
}
}