/**************************************************************************
* 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. *
**************************************************************************/
package javax.microedition.io;
import java.io.*;
import java.net.DatagramPacket;
import java.net.InetAddress;
public class BasicDatagram implements Datagram {
void debug(){
System.out.println("\nBasicDatagram: pointer "+pointer+", offset "+offset+", maxSize "+maxSize);
System.out.println("Content '"+new String(buffer, offset, pointer - offset)+"'");
System.out.println("to "+dgram.getAddress()+", port "+dgram.getPort());
System.out.println("DatagramPacket: offset "+dgram.getOffset()+", length "+dgram.getLength());
System.out.println("Content '"+new String(dgram.getData(), dgram.getOffset(), dgram.getLength())+"'\n");
}
private Input in;
private Output out;
private DataInputStream dataIn;
private DataOutputStream dataOut;
int pointer = 0;
int offset = 0;
byte[] buffer;
int maxSize;
DatagramPacket dgram;
BasicDatagram(byte[] buf, int size){
dgram = new DatagramPacket(buf,size);
in = new Input();
dataIn = new DataInputStream(in);
out = new Output();
dataOut = new DataOutputStream(out);
buffer = buf;
maxSize = size;
}
BasicDatagram(byte[] buf, int size, String name) throws IOException {
if(name.startsWith("//")){
name = name.substring(2);
}
int index = name.lastIndexOf(':');
try {
int port = Integer.parseInt(name.substring(index+1));
dgram = new DatagramPacket(buf,size, InetAddress.getByName(name.substring(index)),port);
}
catch(Exception e){
throw new IOException("invalid name");
}
in = new Input();
dataIn = new DataInputStream(in);
out = new Output();
dataOut = new DataOutputStream(out);
buffer = buf;
maxSize = size;
}
public String getAddress(){
InetAddress addr = dgram.getAddress();
return "//"+(addr == null ? "" : addr.getHostName())+":"+dgram.getPort();
}
public byte[] getData(){
return buffer;
}
public int getLength(){
return maxSize;
}
public int getOffset(){
return offset;
}
public void reset(){
maxSize = buffer.length;
dgram.setData(buffer, 0, maxSize);
offset = 0;
pointer = 0;
}
public void setAddress(String name) throws java.io.IOException{
if(name.startsWith("//")){
name = name.substring(2);
}
int index = name.lastIndexOf(':');
try {
int port = Integer.parseInt(name.substring(index+1));
dgram.setAddress(InetAddress.getByName(name.substring(index)));
dgram.setPort(port);
}
catch(RuntimeException rt){
throw new IOException("invalid name");
}
}
public void setAddress(Datagram d){
try {
setAddress(d.getAddress());
}
catch(IOException ioe){}
}
public void setData(byte[] data, int offset, int length){
dgram.setData(data, offset, length);
buffer = data;
this.offset = offset;
pointer = offset;
maxSize = length;
}
public void setLength(int length){
dgram.setLength(length);
maxSize = length;
}
class Input extends InputStream {
public int read() throws IOException {
if(pointer >= maxSize){
return -1;
}
try {
return ((char)buffer[pointer++]);
}
catch(Exception e){
throw new IOException();
}
}
public int read(byte[] buf, int off, int len) throws IOException {
if(off<0 || len<0 || off > buf.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
if(pointer >= maxSize){
return -1;
}
int length = maxSize - pointer;
length = len > length ? length : len;
System.arraycopy(buffer,pointer,buf,off,length);
pointer += length;
return length;
}
}
class Output extends OutputStream {
public void write(int b) throws IOException {
if(pointer >= maxSize){
throw new IOException("Buffer is full");
}
try {
buffer[pointer++] = (byte)b;
}
catch(Exception e){
throw new IOException();
}
}
public void write(byte[] buf, int off, int len) throws IOException {
if(off<0 || len<0 || off > buf.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
if(pointer >= maxSize){
throw new IOException("Buffer is full");
}
int length = maxSize - pointer;
length = len > length ? length : len;
System.arraycopy(buf,off,buffer,pointer,length);
pointer += length;
if (length != len){
throw new IOException("Buffer is full");
}
}
}
//DataInput API ...
public void readFully(byte[] b) throws IOException {
dataIn.readFully(b);
}
public void readFully(byte[] b, int off, int len) throws IOException {
dataIn.readFully(b,off,len);
}
public int skipBytes(int n) throws IOException {
return dataIn.skipBytes(n);
}
public boolean readBoolean() throws IOException {
return dataIn.readBoolean();
}
public byte readByte() throws IOException {
return dataIn.readByte();
}
public int readUnsignedByte() throws IOException {
return dataIn.readUnsignedByte();
}
public short readShort() throws IOException {
return dataIn.readShort();
}
public int readUnsignedShort() throws IOException {
return dataIn.readUnsignedShort();
}
public char readChar() throws IOException {
return dataIn.readChar();
}
public int readInt() throws IOException {
return dataIn.readInt();
}
public long readLong() throws IOException {
return dataIn.readLong();
}
public float readFloat() throws IOException {
return dataIn.readFloat();
}
public double readDouble() throws IOException {
return dataIn.readDouble();
}
public String readLine() throws IOException {
return dataIn.readLine();
}
public String readUTF() throws IOException {
return dataIn.readUTF();
}
//DataOutput API
public void write(int b) throws IOException {
dataOut.write(b);
}
public void write(byte[] b) throws IOException {
dataOut.write(b);
}
public void write(byte[] b, int off, int len) throws IOException {
dataOut.write(b,off,len);
}
public void writeBoolean(boolean v) throws IOException {
this.dataOut.writeBoolean(v);
}
public void writeByte(int v) throws IOException {
dataOut.writeByte(v);
}
public void writeShort(int v) throws IOException {
dataOut.writeShort(v);
}
public void writeChar(int v) throws IOException {
dataOut.writeChar(v);
}
public void writeInt(int v) throws IOException {
dataOut.writeInt(v);
}
public void writeLong(long v) throws IOException {
dataOut.writeLong(v);
}
public void writeFloat(float v) throws IOException {
dataOut.writeFloat(v);
}
public void writeDouble(double v) throws IOException {
dataOut.writeDouble(v);
}
public void writeBytes(String s) throws IOException {
dataOut.writeBytes(s);
}
public void writeChars(String s) throws IOException {
dataOut.writeChars(s);
}
public void writeUTF(String s) throws IOException {
dataOut.writeUTF(s);
}
}