| 1 | /* |
| 2 | * Copyright (c) 2001-2009, Jean Tessier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * * Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * * Neither the name of Jean Tessier nor the names of his contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | package com.jeantessier.metrics; |
| 34 | |
| 35 | import java.util.*; |
| 36 | |
| 37 | import org.apache.log4j.*; |
| 38 | |
| 39 | /** |
| 40 | * <p>Accumulates a set of values. Its numerical value is the |
| 41 | * cardinality (i.e., size) of the set. <code>OOMetrics</code> |
| 42 | * uses it to keep track of dependencies.</p> |
| 43 | * |
| 44 | * <p>This is the syntax for initializing this type of |
| 45 | * measurement:</p> |
| 46 | * |
| 47 | * <pre> |
| 48 | * <init> |
| 49 | * [SET | LIST] |
| 50 | * </init> |
| 51 | * </pre> |
| 52 | * |
| 53 | * <p>Defaults to SET (i.e., does not count duplicates).</p> |
| 54 | */ |
| 55 | public class NameListMeasurement extends MeasurementBase implements CollectionMeasurement { |
| 56 | private Collection<String> values; |
| 57 | |
| 58 | public NameListMeasurement(MeasurementDescriptor descriptor, Metrics context, String initText) { |
| 59 | super(descriptor, context, initText); |
| 60 | |
| 61 | if (initText != null) { |
| 62 | if (initText.trim().equalsIgnoreCase("list")) { |
| 63 | values = new LinkedList<String>(); |
| 64 | } else if (initText.trim().equalsIgnoreCase("set")) { |
| 65 | values = new HashSet<String>(); |
| 66 | } else { |
| 67 | Logger.getLogger(getClass()).debug("Cannot initialize with \"" + initText + "\", using default value of SET instead"); |
| 68 | values = new HashSet<String>(); |
| 69 | } |
| 70 | } else { |
| 71 | Logger.getLogger(getClass()).debug("Cannot initialize with null text, using default value of SET instead"); |
| 72 | values = new HashSet<String>(); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | public void add(Object object) { |
| 77 | if (object instanceof String) { |
| 78 | values.add((String) object); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | public void accept(MeasurementVisitor visitor) { |
| 83 | visitor.visitNameListMeasurement(this); |
| 84 | } |
| 85 | |
| 86 | public Number getValue() { |
| 87 | return values.size(); |
| 88 | } |
| 89 | |
| 90 | public boolean isEmpty() { |
| 91 | return values.isEmpty(); |
| 92 | } |
| 93 | |
| 94 | protected double compute() { |
| 95 | return values.size(); |
| 96 | } |
| 97 | |
| 98 | public Collection<String> getValues() { |
| 99 | return Collections.unmodifiableCollection(values); |
| 100 | } |
| 101 | } |