| /* |
| * 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.apache.jackrabbit.oak.query.ast; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.jackrabbit.oak.commons.PathUtils; |
| import org.apache.jackrabbit.oak.query.index.FilterImpl; |
| import org.apache.jackrabbit.oak.spi.query.Filter; |
| |
| /** |
| * The "ischildnode(...)" condition. |
| */ |
| public class ChildNodeImpl extends ConstraintImpl { |
| |
| private final String selectorName; |
| private final String parentPath; |
| private SelectorImpl selector; |
| |
| public ChildNodeImpl(String selectorName, String parentPath) { |
| this.selectorName = selectorName; |
| this.parentPath = parentPath; |
| } |
| |
| @Override |
| boolean accept(AstVisitor v) { |
| return v.visit(this); |
| } |
| |
| @Override |
| public String toString() { |
| return "ischildnode(" + quote(selectorName) + ", " + quote(parentPath) + ')'; |
| } |
| |
| public void bindSelector(SourceImpl source) { |
| selector = source.getExistingSelector(selectorName); |
| } |
| |
| @Override |
| public Set<PropertyExistenceImpl> getPropertyExistenceConditions() { |
| return Collections.emptySet(); |
| } |
| |
| @Override |
| public Set<SelectorImpl> getSelectors() { |
| return Collections.singleton(selector); |
| } |
| |
| @Override |
| public boolean evaluate() { |
| String p = selector.currentPath(); |
| String local = getLocalPath(p); |
| if (local == null) { |
| // not a local path |
| return false; |
| } |
| // the parent of the root is the root, |
| // so we need to special case this |
| if (PathUtils.denotesRoot(local)) { |
| return false; |
| } |
| String path = normalizePath(parentPath); |
| return PathUtils.getParentPath(local).equals(path); |
| } |
| |
| @Override |
| public void restrict(FilterImpl f) { |
| if (selector.equals(f.getSelector())) { |
| String path = normalizePath(parentPath); |
| f.restrictPath(path, Filter.PathRestriction.DIRECT_CHILDREN); |
| } |
| } |
| |
| @Override |
| public void restrictPushDown(SelectorImpl s) { |
| if (s.equals(selector)) { |
| s.restrictSelector(this); |
| } |
| } |
| |
| @Override |
| public AstElement copyOf() { |
| return new ChildNodeImpl(selectorName, parentPath); |
| } |
| } |