| 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.dependency; |
| 34 | |
| 35 | import java.util.*; |
| 36 | |
| 37 | import org.apache.log4j.*; |
| 38 | |
| 39 | import com.jeantessier.classreader.*; |
| 40 | |
| 41 | public class DeletingVisitor implements Visitor, RemoveVisitor { |
| 42 | private NodeFactory factory; |
| 43 | |
| 44 | public DeletingVisitor(NodeFactory factory) { |
| 45 | this.factory = factory; |
| 46 | } |
| 47 | |
| 48 | public NodeFactory getFactory() { |
| 49 | return factory; |
| 50 | } |
| 51 | |
| 52 | public void traverseNodes(Collection<? extends Node> nodes) { |
| 53 | throw new UnsupportedOperationException("not implemented yet."); |
| 54 | } |
| 55 | |
| 56 | public void traverseInbound(Collection<? extends Node> nodes) { |
| 57 | throw new UnsupportedOperationException("not implemented yet."); |
| 58 | } |
| 59 | |
| 60 | public void traverseOutbound(Collection<? extends Node> nodes) { |
| 61 | throw new UnsupportedOperationException("not implemented yet."); |
| 62 | } |
| 63 | /* |
| 64 | * Regular visits are used to completely delete sections |
| 65 | */ |
| 66 | |
| 67 | public void visitPackageNode(PackageNode node) { |
| 68 | Logger.getLogger(getClass()).debug("visitPackageNode(" + node + ")"); |
| 69 | |
| 70 | for (ClassNode classNode : new ArrayList<ClassNode>(node.getClasses())) { |
| 71 | classNode.accept(this); |
| 72 | } |
| 73 | |
| 74 | visitNode(node); |
| 75 | } |
| 76 | |
| 77 | public void visitClassNode(ClassNode node) { |
| 78 | Logger.getLogger(getClass()).debug("visitClassNode(" + node + ")"); |
| 79 | |
| 80 | for (FeatureNode featureNode : new ArrayList<FeatureNode>(node.getFeatures())) { |
| 81 | featureNode.accept(this); |
| 82 | } |
| 83 | |
| 84 | visitNode(node); |
| 85 | } |
| 86 | |
| 87 | public void visitFeatureNode(FeatureNode node) { |
| 88 | Logger.getLogger(getClass()).debug("visitFeatureNode(" + node + ")"); |
| 89 | |
| 90 | visitNode(node); |
| 91 | } |
| 92 | |
| 93 | private void visitNode(Node node) { |
| 94 | node.setConfirmed(false); |
| 95 | |
| 96 | for (Node outbound : new ArrayList<Node>(node.getOutboundDependencies())) { |
| 97 | node.removeDependency(outbound); |
| 98 | outbound.acceptOutbound(this); |
| 99 | } |
| 100 | |
| 101 | node.acceptOutbound(this); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Outbound visits are used to clean up sections |
| 106 | */ |
| 107 | |
| 108 | public void visitOutboundPackageNode(PackageNode node) { |
| 109 | Logger.getLogger(getClass()).debug("visitOutboundPackageNode(" + node + ")"); |
| 110 | |
| 111 | if (canDeletePackage(node)) { |
| 112 | factory.deletePackage(node); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | public void visitOutboundClassNode(ClassNode node) { |
| 117 | Logger.getLogger(getClass()).debug("visitOutboundClassNode(" + node + ")"); |
| 118 | |
| 119 | if (canDeleteClass(node)) { |
| 120 | factory.deleteClass(node); |
| 121 | } |
| 122 | |
| 123 | node.getPackageNode().acceptOutbound(this); |
| 124 | } |
| 125 | |
| 126 | public void visitOutboundFeatureNode(FeatureNode node) { |
| 127 | Logger.getLogger(getClass()).debug("visitOutboundFeatureNode(" + node + ")"); |
| 128 | |
| 129 | if (canDeleteFeature(node)) { |
| 130 | factory.deleteFeature(node); |
| 131 | } |
| 132 | |
| 133 | node.getClassNode().acceptOutbound(this); |
| 134 | } |
| 135 | |
| 136 | private boolean canDelete(Node node) { |
| 137 | return !node.isConfirmed() && node.getInboundDependencies().isEmpty(); |
| 138 | } |
| 139 | |
| 140 | private boolean canDeletePackage(PackageNode node) { |
| 141 | return canDelete(node) && node.getClasses().isEmpty(); |
| 142 | } |
| 143 | |
| 144 | private boolean canDeleteClass(ClassNode node) { |
| 145 | return canDelete(node) && node.getFeatures().isEmpty(); |
| 146 | } |
| 147 | |
| 148 | private boolean canDeleteFeature(FeatureNode node) { |
| 149 | return canDelete(node); |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * Inbound visits are not used |
| 154 | */ |
| 155 | |
| 156 | public void visitInboundPackageNode(PackageNode node) { |
| 157 | // Do nothing |
| 158 | } |
| 159 | |
| 160 | public void visitInboundClassNode(ClassNode node) { |
| 161 | // Do nothing |
| 162 | } |
| 163 | |
| 164 | public void visitInboundFeatureNode(FeatureNode node) { |
| 165 | // Do nothing |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * RemoveVisitor methods |
| 170 | */ |
| 171 | |
| 172 | public void removeClass(String classname) { |
| 173 | Node node = factory.getClasses().get(classname); |
| 174 | if (node != null) { |
| 175 | node.accept(this); |
| 176 | } |
| 177 | } |
| 178 | } |