| /* |
| * 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.geode.cache.query.internal; |
| |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.geode.cache.EntryDestroyedException; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.cache.query.AmbiguousNameException; |
| import org.apache.geode.cache.query.FunctionDomainException; |
| import org.apache.geode.cache.query.NameResolutionException; |
| import org.apache.geode.cache.query.QueryInvocationTargetException; |
| import org.apache.geode.cache.query.QueryService; |
| import org.apache.geode.cache.query.TypeMismatchException; |
| |
| /** |
| * Class Description |
| * |
| * @version $Revision: 1.1 $ |
| */ |
| public class CompiledIndexOperation extends AbstractCompiledValue implements MapIndexable { |
| |
| private CompiledValue receiver; |
| private CompiledValue indexExpr; |
| |
| private boolean evalRegionAsEntry = false; |
| |
| public CompiledIndexOperation(CompiledValue receiver, CompiledValue indexExpr) { |
| this.receiver = receiver; |
| this.indexExpr = indexExpr; |
| } |
| |
| public CompiledIndexOperation(CompiledValue receiver, CompiledValue indexExpr, |
| boolean evalRegionAsEntry) { |
| this.receiver = receiver; |
| this.indexExpr = indexExpr; |
| this.evalRegionAsEntry = evalRegionAsEntry; |
| } |
| |
| @Override |
| public List getChildren() { |
| List list = new ArrayList(); |
| list.add(receiver); |
| list.add(indexExpr); |
| return list; |
| } |
| |
| @Override |
| public int getType() { |
| return TOK_LBRACK; |
| } |
| |
| @Override |
| public Set computeDependencies(ExecutionContext context) |
| throws TypeMismatchException, AmbiguousNameException, NameResolutionException { |
| context.addDependencies(this, this.receiver.computeDependencies(context)); |
| return context.addDependencies(this, this.indexExpr.computeDependencies(context)); |
| } |
| |
| @Override |
| public Object evaluate(ExecutionContext context) throws TypeMismatchException, |
| FunctionDomainException, NameResolutionException, QueryInvocationTargetException { |
| Object rcvr = this.receiver.evaluate(context); |
| Object index = this.indexExpr.evaluate(context); |
| |
| if (rcvr == null || rcvr == QueryService.UNDEFINED) { |
| return QueryService.UNDEFINED; |
| } |
| // In case of cq, the rcvr could be Region.Entry or CqEntry |
| // get the value from the entry for further processing |
| if (context.isCqQueryContext() && (rcvr instanceof Region.Entry || rcvr instanceof CqEntry)) { |
| try { |
| if (rcvr instanceof Region.Entry) { |
| Region.Entry re = (Region.Entry) rcvr; |
| if (re.isDestroyed()) { |
| return QueryService.UNDEFINED; |
| } |
| rcvr = re.getValue(); |
| } else if (rcvr instanceof CqEntry) { |
| CqEntry re = (CqEntry) rcvr; |
| rcvr = re.getValue(); |
| } |
| } catch (EntryDestroyedException ede) { |
| // Even though isDestory() check is made, the entry could |
| // throw EntryDestroyedException if the value becomes null. |
| return QueryService.UNDEFINED; |
| } |
| } |
| |
| if (rcvr instanceof Map) { |
| return ((Map) rcvr).get(index); |
| } |
| if ((rcvr instanceof List) || rcvr.getClass().isArray() || (rcvr instanceof String)) { |
| if (!(index instanceof Integer)) { |
| throw new TypeMismatchException( |
| "index expression must be an integer for lists or arrays"); |
| } |
| } |
| if (rcvr instanceof List) { |
| return ((List) rcvr).get(((Integer) index).intValue()); |
| } |
| if (rcvr instanceof String) { |
| return new Character(((String) rcvr).charAt(((Integer) index).intValue())); |
| } |
| if (rcvr.getClass().isArray()) { |
| // @todo we need to handle primitive arrays here and wrap the result // |
| /* |
| * in the appropriate wrapper type (i.e. java.lang.Integer, etc.) if (rcvr instanceof |
| * Object[]) { return ((Object[])rcvr)[((Integer)index).intValue()]; } throw new |
| * UnsupportedOperationException("indexing primitive arrays not yet implemented"); |
| */ |
| return Array.get(rcvr, ((Integer) index).intValue()); |
| } |
| // Asif : In case of 4.1.0 branch where the Map implementation is not |
| // present, |
| // receiver will be an instance of Region but for Map implementation ( in |
| // trunk) |
| // it is an instance of QRegion only |
| if (rcvr instanceof QRegion) { |
| Region.Entry entry = ((QRegion) rcvr).getEntry(index); |
| if (entry == null) { |
| return null; |
| } |
| return this.evalRegionAsEntry ? entry : entry.getValue(); |
| } |
| /* |
| * if (rcvr instanceof Region) { Region.Entry entry = ((Region)rcvr).getEntry(index); if (entry |
| * == null) { return null; } return this.evalRegionAsEntry? entry:entry.getValue(); } |
| */ |
| throw new TypeMismatchException( |
| String.format("index expression not supported on objects of type %s", |
| rcvr.getClass().getName())); |
| } |
| |
| // Asif :Function for generating canonicalized expression |
| @Override |
| public void generateCanonicalizedExpression(StringBuilder clauseBuffer, ExecutionContext context) |
| throws AmbiguousNameException, TypeMismatchException, NameResolutionException { |
| // Asif: The canonicalization of Index operator will be of |
| // the form IterX.getPositions[IterY.a.b.c] |
| clauseBuffer.insert(0, ']'); |
| indexExpr.generateCanonicalizedExpression(clauseBuffer, context); |
| clauseBuffer.insert(0, '['); |
| receiver.generateCanonicalizedExpression(clauseBuffer, context); |
| } |
| |
| @Override |
| public CompiledValue getReceiver() { |
| return receiver; |
| } |
| |
| @Override |
| public boolean hasIdentifierAtLeafNode() { |
| if (this.receiver.getType() == Identifier) { |
| return true; |
| } else { |
| return this.receiver.hasIdentifierAtLeafNode(); |
| } |
| } |
| |
| public CompiledValue getExpression() { |
| return indexExpr; |
| } |
| |
| |
| @Override |
| public CompiledValue getMapLookupKey() { |
| return this.indexExpr; |
| } |
| |
| |
| @Override |
| public CompiledValue getReceiverSansIndexArgs() { |
| return this.receiver; |
| } |
| |
| |
| @Override |
| public List<CompiledValue> getIndexingKeys() { |
| List<CompiledValue> list = new ArrayList<CompiledValue>(1); |
| list.add(this.indexExpr); |
| return list; |
| } |
| } |