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Java example source code file (BasicMarker.java)
The BasicMarker.java Java example source code/** * Copyright (c) 2004-2011 QOS.ch * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ package org.slf4j.helpers; import java.util.Collections; import java.util.Iterator; import java.util.List; import java.util.Vector; import org.slf4j.Marker; /** * A simple implementation of the {@link Marker} interface. * * @author Ceki Gülcü * @author Joern Huxhorn */ public class BasicMarker implements Marker { private static final long serialVersionUID = 1803952589649545191L; private final String name; private List<Marker> referenceList; BasicMarker(String name) { if (name == null) { throw new IllegalArgumentException("A marker name cannot be null"); } this.name = name; } public String getName() { return name; } public synchronized void add(Marker reference) { if (reference == null) { throw new IllegalArgumentException("A null value cannot be added to a Marker as reference."); } // no point in adding the reference multiple times if (this.contains(reference)) { return; } else if (reference.contains(this)) { // avoid recursion // a potential reference should not its future "parent" as a reference return; } else { // let's add the reference if (referenceList == null) { referenceList = new Vector<Marker>(); } referenceList.add(reference); } } public synchronized boolean hasReferences() { return ((referenceList != null) && (referenceList.size() > 0)); } public boolean hasChildren() { return hasReferences(); } public synchronized Iterator<Marker> iterator() { if (referenceList != null) { return referenceList.iterator(); } else { List<Marker> emptyList = Collections.emptyList(); return emptyList.iterator(); } } public synchronized boolean remove(Marker referenceToRemove) { if (referenceList == null) { return false; } int size = referenceList.size(); for (int i = 0; i < size; i++) { Marker m = referenceList.get(i); if (referenceToRemove.equals(m)) { referenceList.remove(i); return true; } } return false; } public boolean contains(Marker other) { if (other == null) { throw new IllegalArgumentException("Other cannot be null"); } if (this.equals(other)) { return true; } if (hasReferences()) { for (Marker ref : referenceList) { if (ref.contains(other)) { return true; } } } return false; } /** * This method is mainly used with Expression Evaluators. */ public boolean contains(String name) { if (name == null) { throw new IllegalArgumentException("Other cannot be null"); } if (this.name.equals(name)) { return true; } if (hasReferences()) { for (Marker ref : referenceList) { if (ref.contains(name)) { return true; } } } return false; } private static String OPEN = "[ "; private static String CLOSE = " ]"; private static String SEP = ", "; public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof Marker)) return false; final Marker other = (Marker) obj; return name.equals(other.getName()); } public int hashCode() { return name.hashCode(); } public String toString() { if (!this.hasReferences()) { return this.getName(); } Iterator<Marker> it = this.iterator(); Marker reference; StringBuilder sb = new StringBuilder(this.getName()); sb.append(' ').append(OPEN); while (it.hasNext()) { reference = it.next(); sb.append(reference.getName()); if (it.hasNext()) { sb.append(SEP); } } sb.append(CLOSE); return sb.toString(); } } Other Java examples (source code examples)Here is a short list of links related to this Java BasicMarker.java source code file: |
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