/*
* Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
*/
package com.sun.xml.internal.fastinfoset.algorithm;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.CharBuffer;
import java.util.ArrayList;
import java.util.List;
import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException;
import com.sun.xml.internal.fastinfoset.CommonResourceBundle;
public class FloatEncodingAlgorithm extends IEEE754FloatingPointEncodingAlgorithm {
public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {
if (octetLength % FLOAT_SIZE != 0) {
throw new EncodingAlgorithmException(CommonResourceBundle.getInstance().
getString("message.lengthNotMultipleOfFloat", new Object[]{Integer.valueOf(FLOAT_SIZE)}));
}
return octetLength / FLOAT_SIZE;
}
public int getOctetLengthFromPrimitiveLength(int primitiveLength) {
return primitiveLength * FLOAT_SIZE;
}
public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException {
float[] data = new float[getPrimtiveLengthFromOctetLength(length)];
decodeFromBytesToFloatArray(data, 0, b, start, length);
return data;
}
public final Object decodeFromInputStream(InputStream s) throws IOException {
return decodeFromInputStreamToFloatArray(s);
}
public void encodeToOutputStream(Object data, OutputStream s) throws IOException {
if (!(data instanceof float[])) {
throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat"));
}
final float[] fdata = (float[])data;
encodeToOutputStreamFromFloatArray(fdata, s);
}
public final Object convertFromCharacters(char[] ch, int start, int length) {
final CharBuffer cb = CharBuffer.wrap(ch, start, length);
final List floatList = new ArrayList();
matchWhiteSpaceDelimnatedWords(cb,
new WordListener() {
public void word(int start, int end) {
String fStringValue = cb.subSequence(start, end).toString();
floatList.add(Float.valueOf(fStringValue));
}
}
);
return generateArrayFromList(floatList);
}
public final void convertToCharacters(Object data, StringBuffer s) {
if (!(data instanceof float[])) {
throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat"));
}
final float[] fdata = (float[])data;
convertToCharactersFromFloatArray(fdata, s);
}
public final void decodeFromBytesToFloatArray(float[] data, int fstart, byte[] b, int start, int length) {
final int size = length / FLOAT_SIZE;
for (int i = 0; i < size; i++) {
final int bits = ((b[start++] & 0xFF) << 24) |
((b[start++] & 0xFF) << 16) |
((b[start++] & 0xFF) << 8) |
(b[start++] & 0xFF);
data[fstart++] = Float.intBitsToFloat(bits);
}
}
public final float[] decodeFromInputStreamToFloatArray(InputStream s) throws IOException {
final List floatList = new ArrayList();
final byte[] b = new byte[FLOAT_SIZE];
while (true) {
int n = s.read(b);
if (n != 4) {
if (n == -1) {
break;
}
while(n != 4) {
final int m = s.read(b, n, FLOAT_SIZE - n);
if (m == -1) {
throw new EOFException();
}
n += m;
}
}
final int bits = ((b[0] & 0xFF) << 24) |
((b[1] & 0xFF) << 16) |
((b[2] & 0xFF) << 8) |
(b[3] & 0xFF);
floatList.add(Float.valueOf(Float.intBitsToFloat(bits)));
}
return generateArrayFromList(floatList);
}
public final void encodeToOutputStreamFromFloatArray(float[] fdata, OutputStream s) throws IOException {
for (int i = 0; i < fdata.length; i++) {
final int bits = Float.floatToIntBits(fdata[i]);
s.write((bits >>> 24) & 0xFF);
s.write((bits >>> 16) & 0xFF);
s.write((bits >>> 8) & 0xFF);
s.write(bits & 0xFF);
}
}
public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) {
encodeToBytesFromFloatArray((float[])array, astart, alength, b, start);
}
public final void encodeToBytesFromFloatArray(float[] fdata, int fstart, int flength, byte[] b, int start) {
final int fend = fstart + flength;
for (int i = fstart; i < fend; i++) {
final int bits = Float.floatToIntBits(fdata[i]);
b[start++] = (byte)((bits >>> 24) & 0xFF);
b[start++] = (byte)((bits >>> 16) & 0xFF);
b[start++] = (byte)((bits >>> 8) & 0xFF);
b[start++] = (byte)(bits & 0xFF);
}
}
public final void convertToCharactersFromFloatArray(float[] fdata, StringBuffer s) {
final int end = fdata.length - 1;
for (int i = 0; i <= end; i++) {
s.append(Float.toString(fdata[i]));
if (i != end) {
s.append(' ');
}
}
}
public final float[] generateArrayFromList(List array) {
float[] fdata = new float[array.size()];
for (int i = 0; i < fdata.length; i++) {
fdata[i] = ((Float)array.get(i)).floatValue();
}
return fdata;
}
}