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/*
* Copyright (c) 2010, 2013, 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.
*/
package jdk.nashorn.internal.ir.debug;
import java.util.Comparator;
/**
* Class histogram element for IR / Java object instrumentation
*/
public final class ClassHistogramElement {
/**
* Instance comparator
*/
public static final Comparator<ClassHistogramElement> COMPARE_INSTANCES = new Comparator<ClassHistogramElement>() {
@Override
public int compare(final ClassHistogramElement o1, final ClassHistogramElement o2) {
return (int)Math.abs(o1.instances - o2.instances);
}
};
/**
* Bytes comparator
*/
public static final Comparator<ClassHistogramElement> COMPARE_BYTES = new Comparator<ClassHistogramElement>() {
@Override
public int compare(final ClassHistogramElement o1, final ClassHistogramElement o2) {
return (int)Math.abs(o1.bytes - o2.bytes);
}
};
/**
* Classname comparator
*/
public static final Comparator<ClassHistogramElement> COMPARE_CLASSNAMES = new Comparator<ClassHistogramElement>() {
@Override
public int compare(final ClassHistogramElement o1, final ClassHistogramElement o2) {
return o1.clazz.getCanonicalName().compareTo(o2.clazz.getCanonicalName());
}
};
private final Class<?> clazz;
private long instances;
private long bytes;
/**
* Constructor
* @param clazz class for which to construct histogram
*/
public ClassHistogramElement(final Class<?> clazz) {
this.clazz = clazz;
}
/**
* Add an instance
* @param sizeInBytes byte count
*/
public void addInstance(final long sizeInBytes) {
instances++;
this.bytes += sizeInBytes;
}
/**
* Get size in bytes
* @return size in bytes
*/
public long getBytes() {
return bytes;
}
/**
* Get class
* @return class
*/
public Class<?> getClazz() {
return clazz;
}
/**
* Get number of instances
* @return number of instances
*/
public long getInstances() {
return instances;
}
@Override
public String toString() {
return "ClassHistogramElement[class=" + clazz.getCanonicalName() + ", instances=" + instances + ", bytes=" + bytes + "]";
}
}
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