/* * Copyright (c) 1997, 2008, Oracle and/or its affiliates. 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *//* * The Original Code is HAT. The Initial Developer of the * Original Code is Bill Foote, with contributions from others * at JavaSoft/Sun. */package com.sun.tools.hat.internal.model;import java.io.IOException;import com.sun.tools.hat.internal.parser.ReadBuffer;/* * Base class for lazily read Java heap objects. */public abstract class JavaLazyReadObject extends JavaHeapObject { // file offset from which this object data starts private final long offset; protected JavaLazyReadObject(long offset) { this.offset = offset; } public final int getSize() { return getValueLength() + getClazz().getMinimumObjectSize(); } protected final long getOffset() { return offset; } // return the length of the data for this object protected final int getValueLength() { try { return readValueLength(); } catch (IOException exp) { System.err.println("lazy read failed at offset " + offset); exp.printStackTrace(); return 0; } } // get this object's content as byte array protected final byte[] getValue() { try { return readValue(); } catch (IOException exp) { System.err.println("lazy read failed at offset " + offset); exp.printStackTrace(); return Snapshot.EMPTY_BYTE_ARRAY; } } // get ID of this object public final long getId() { try { ReadBuffer buf = getClazz().getReadBuffer(); int idSize = getClazz().getIdentifierSize(); if (idSize == 4) { return ((long)buf.getInt(offset)) & Snapshot.SMALL_ID_MASK; } else { return buf.getLong(offset); } } catch (IOException exp) { System.err.println("lazy read failed at offset " + offset); exp.printStackTrace(); return -1; } } protected abstract int readValueLength() throws IOException; protected abstract byte[] readValue() throws IOException; // make Integer or Long for given object ID protected static Number makeId(long id) { if ((id & ~Snapshot.SMALL_ID_MASK) == 0) { return new Integer((int)id); } else { return new Long(id); } } // get ID as long value from Number protected static long getIdValue(Number num) { long id = num.longValue(); if (num instanceof Integer) { id &= Snapshot.SMALL_ID_MASK; } return id; } // read object ID from given index from given byte array protected final long objectIdAt(int index, byte[] data) { int idSize = getClazz().getIdentifierSize(); if (idSize == 4) { return ((long)intAt(index, data)) & Snapshot.SMALL_ID_MASK; } else { return longAt(index, data); } } // utility methods to read primitive types from byte array protected static byte byteAt(int index, byte[] value) { return value[index]; } protected static boolean booleanAt(int index, byte[] value) { return (value[index] & 0xff) == 0? false: true; } protected static char charAt(int index, byte[] value) { int b1 = ((int) value[index++] & 0xff); int b2 = ((int) value[index++] & 0xff); return (char) ((b1 << 8) + b2); } protected static short shortAt(int index, byte[] value) { int b1 = ((int) value[index++] & 0xff); int b2 = ((int) value[index++] & 0xff); return (short) ((b1 << 8) + b2); } protected static int intAt(int index, byte[] value) { int b1 = ((int) value[index++] & 0xff); int b2 = ((int) value[index++] & 0xff); int b3 = ((int) value[index++] & 0xff); int b4 = ((int) value[index++] & 0xff); return ((b1 << 24) + (b2 << 16) + (b3 << 8) + b4); } protected static long longAt(int index, byte[] value) { long val = 0; for (int j = 0; j < 8; j++) { val = val << 8; int b = ((int)value[index++]) & 0xff; val |= b; } return val; } protected static float floatAt(int index, byte[] value) { int val = intAt(index, value); return Float.intBitsToFloat(val); } protected static double doubleAt(int index, byte[] value) { long val = longAt(index, value); return Double.longBitsToDouble(val); }}
/*
* Copyright (c) 1997, 2008, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* The Original Code is HAT. The Initial Developer of the
* Original Code is Bill Foote, with contributions from others
* at JavaSoft/Sun.
*/
package com.sun.tools.hat.internal.model;
import java.io.IOException;
import com.sun.tools.hat.internal.parser.ReadBuffer;
/*
* Base class for lazily read Java heap objects.
*/
public abstract class JavaLazyReadObject extends JavaHeapObject {
// file offset from which this object data starts
private final long offset;
protected JavaLazyReadObject(long offset) {
this.offset = offset;
}
public final int getSize() {
return getValueLength() + getClazz().getMinimumObjectSize();
}
protected final long getOffset() {
return offset;
}
// return the length of the data for this object
protected final int getValueLength() {
try {
return readValueLength();
} catch (IOException exp) {
System.err.println("lazy read failed at offset " + offset);
exp.printStackTrace();
return 0;
}
}
// get this object's content as byte array
protected final byte[] getValue() {
try {
return readValue();
} catch (IOException exp) {
System.err.println("lazy read failed at offset " + offset);
exp.printStackTrace();
return Snapshot.EMPTY_BYTE_ARRAY;
}
}
// get ID of this object
public final long getId() {
try {
ReadBuffer buf = getClazz().getReadBuffer();
int idSize = getClazz().getIdentifierSize();
if (idSize == 4) {
return ((long)buf.getInt(offset)) & Snapshot.SMALL_ID_MASK;
} else {
return buf.getLong(offset);
}
} catch (IOException exp) {
System.err.println("lazy read failed at offset " + offset);
exp.printStackTrace();
return -1;
}
}
protected abstract int readValueLength() throws IOException;
protected abstract byte[] readValue() throws IOException;
// make Integer or Long for given object ID
protected static Number makeId(long id) {
if ((id & ~Snapshot.SMALL_ID_MASK) == 0) {
return new Integer((int)id);
} else {
return new Long(id);
}
}
// get ID as long value from Number
protected static long getIdValue(Number num) {
long id = num.longValue();
if (num instanceof Integer) {
id &= Snapshot.SMALL_ID_MASK;
}
return id;
}
// read object ID from given index from given byte array
protected final long objectIdAt(int index, byte[] data) {
int idSize = getClazz().getIdentifierSize();
if (idSize == 4) {
return ((long)intAt(index, data)) & Snapshot.SMALL_ID_MASK;
} else {
return longAt(index, data);
}
}
// utility methods to read primitive types from byte array
protected static byte byteAt(int index, byte[] value) {
return value[index];
}
protected static boolean booleanAt(int index, byte[] value) {
return (value[index] & 0xff) == 0? false: true;
}
protected static char charAt(int index, byte[] value) {
int b1 = ((int) value[index++] & 0xff);
int b2 = ((int) value[index++] & 0xff);
return (char) ((b1 << 8) + b2);
}
protected static short shortAt(int index, byte[] value) {
int b1 = ((int) value[index++] & 0xff);
int b2 = ((int) value[index++] & 0xff);
return (short) ((b1 << 8) + b2);
}
protected static int intAt(int index, byte[] value) {
int b1 = ((int) value[index++] & 0xff);
int b2 = ((int) value[index++] & 0xff);
int b3 = ((int) value[index++] & 0xff);
int b4 = ((int) value[index++] & 0xff);
return ((b1 << 24) + (b2 << 16) + (b3 << 8) + b4);
}
protected static long longAt(int index, byte[] value) {
long val = 0;
for (int j = 0; j < 8; j++) {
val = val << 8;
int b = ((int)value[index++]) & 0xff;
val |= b;
}
return val;
}
protected static float floatAt(int index, byte[] value) {
int val = intAt(index, value);
return Float.intBitsToFloat(val);
}
protected static double doubleAt(int index, byte[] value) {
long val = longAt(index, value);
return Double.longBitsToDouble(val);
}
}