| /* |
| * 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 + "]"; |
| } |
| } |