| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.codehaus.groovy.macro.matcher; |
| |
| import groovy.lang.Closure; |
| import groovy.lang.DelegatesTo; |
| import groovy.lang.MapWithDefault; |
| import org.codehaus.groovy.ast.ASTNode; |
| import org.codehaus.groovy.ast.expr.Expression; |
| import org.codehaus.groovy.runtime.DefaultGroovyMethods; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class TreeContext { |
| private enum TreeContextKey { |
| expression_replacement |
| } |
| final TreeContext parent; |
| final ASTNode node; |
| final List<TreeContext> siblings = new LinkedList<TreeContext>(); |
| final List<TreeContextAction> onPopHandlers = new LinkedList<TreeContextAction>(); |
| final Map<Object, List<?>> userdata = MapWithDefault.newInstance( |
| new HashMap<Object, List<?>>(), |
| new Closure(this) { |
| private static final long serialVersionUID = -4694773031569936343L; |
| |
| public Object doCall(Object key) { |
| return new LinkedList<Object>(); |
| } |
| } |
| ); |
| |
| TreeContext(final TreeContext parent, final ASTNode node) { |
| this.parent = parent; |
| this.node = node; |
| if (parent!=null) { |
| parent.siblings.add(this); |
| } |
| } |
| |
| public Map<?, List<?>> getUserdata() { |
| return userdata; |
| } |
| |
| public void putUserdata(Object key, Object value) { |
| ((List)userdata.get(key)).add(value); |
| } |
| |
| public List<?> getUserdata(Object key) { |
| return getUserdata(key,true); |
| } |
| |
| public List<?> getUserdata(Object key, boolean searchParent) { |
| if (userdata.containsKey(key)) { |
| return userdata.get(key); |
| } else if (parent!=null && searchParent) { |
| return parent.getUserdata(key, true); |
| } |
| return null; |
| } |
| |
| public TreeContext getParent() { return parent; } |
| public ASTNode getNode() { return node; } |
| |
| public TreeContext fork(ASTNode node) { |
| return new TreeContext(this, node); |
| } |
| |
| public boolean matches(ASTNodePredicate predicate) { |
| return predicate.matches(node); |
| } |
| |
| public boolean matches(@DelegatesTo(value=ASTNode.class, strategy=Closure.DELEGATE_FIRST) Closure<Boolean> predicate) { |
| return MatcherUtils.cloneWithDelegate(predicate, node).call(); |
| } |
| |
| public List<TreeContext> getSiblings() { |
| return Collections.unmodifiableList(siblings); |
| } |
| |
| public List<TreeContextAction> getOnPopHandlers() { |
| return Collections.unmodifiableList(onPopHandlers); |
| } |
| |
| public void afterVisit(TreeContextAction action) { |
| onPopHandlers.add(action); |
| } |
| |
| public void afterVisit(@DelegatesTo(value=TreeContext.class, strategy=Closure.DELEGATE_FIRST) Closure<?> action) { |
| Closure<?> clone = MatcherUtils.cloneWithDelegate(action, this); |
| afterVisit(DefaultGroovyMethods.asType(clone, TreeContextAction.class)); |
| } |
| |
| public void setReplacement(Expression replacement) { |
| userdata.put(TreeContextKey.expression_replacement, Collections.singletonList(replacement)); |
| } |
| |
| public Expression getReplacement() { |
| List<?> list = userdata.get(TreeContextKey.expression_replacement); |
| if (list.size()==1) { |
| return (Expression) list.get(0); |
| } |
| return null; |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder sb = new StringBuilder("TreeContext{"); |
| sb.append("node=").append(dumpNode()); |
| TreeContext p = parent; |
| if (p!=null) { |
| sb.append(", path="); |
| } |
| while (p!=null) { |
| sb.append(p.dumpNode()); |
| sb.append("<-"); |
| p = p.parent; |
| } |
| //sb.append(", siblings=").append(siblings); |
| sb.append('}'); |
| return sb.toString(); |
| } |
| |
| private String dumpNode() { |
| return node!=null?node.getClass().getSimpleName():"undefined"; |
| } |
| } |