| /* |
| * 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.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.cache.query.SelectResults; |
| import org.apache.geode.cache.query.internal.types.CollectionTypeImpl; |
| import org.apache.geode.cache.query.internal.types.ObjectTypeImpl; |
| import org.apache.geode.cache.query.types.CollectionType; |
| import org.apache.geode.cache.query.types.ObjectType; |
| import org.apache.geode.cache.query.types.StructType; |
| import org.apache.geode.internal.Assert; |
| import org.apache.geode.internal.DataSerializableFixedID; |
| import org.apache.geode.internal.InternalDataSerializer; |
| import org.apache.geode.internal.Version; |
| |
| // @todo probably should assert element type when elements added |
| /** |
| * Implementation of SelectResults that extends HashSet If the elements are Structs, then use a |
| * StructSet instead. |
| * |
| * @since GemFire 4.0 |
| */ |
| public class ResultsSet extends HashSet implements SelectResults, DataSerializableFixedID { |
| private static final long serialVersionUID = -5423281031630216824L; |
| private ObjectType elementType; |
| |
| /** |
| * Empty constructor to satisfy <code>DataSerializer</code> requirements |
| */ |
| public ResultsSet() {} |
| |
| ResultsSet(Collection c) { |
| super(c); |
| } |
| |
| public ResultsSet(SelectResults sr) { |
| super(sr); |
| // grab type info |
| setElementType(sr.getCollectionType().getElementType()); |
| } |
| |
| public ResultsSet(ObjectType elementType) { |
| super(); |
| setElementType(elementType); |
| } |
| |
| ResultsSet(ObjectType elementType, int initialCapacity) { |
| super(initialCapacity); |
| setElementType(elementType); |
| } |
| |
| ResultsSet(int initialCapacity, float loadFactor) { |
| super(initialCapacity, loadFactor); |
| } |
| |
| ResultsSet(int initialCapacity) { |
| super(initialCapacity); |
| } |
| |
| @Override |
| public void setElementType(ObjectType elementType) { |
| if (elementType instanceof StructType) |
| throw new IllegalArgumentException( |
| "This collection does not support struct elements"); |
| this.elementType = elementType; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == this) { |
| return true; |
| } |
| if (!(other instanceof ResultsSet)) { |
| return false; |
| } |
| if (!this.elementType.equals(((ResultsSet) other).elementType)) { |
| return false; |
| } |
| return super.equals(other); |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.elementType.hashCode(); |
| } |
| |
| @Override |
| public List asList() { |
| return new ArrayList(this); |
| } |
| |
| @Override |
| public Set asSet() { |
| return this; |
| } |
| |
| @Override |
| public CollectionType getCollectionType() { |
| return new CollectionTypeImpl(Set.class, this.elementType); |
| } |
| |
| @Override |
| public boolean isModifiable() { |
| return true; |
| } |
| |
| @Override |
| public int occurrences(Object element) { |
| return contains(element) ? 1 : 0; |
| } |
| |
| |
| @Override |
| public int getDSFID() { |
| return RESULTS_SET; |
| } |
| |
| @Override |
| public void fromData(DataInput in) throws IOException, ClassNotFoundException { |
| int size = in.readInt(); |
| ObjectTypeImpl clt = new ObjectTypeImpl(); |
| InternalDataSerializer.invokeFromData(clt, in); |
| setElementType(clt); |
| for (int k = size; k > 0; k--) { |
| this.add(DataSerializer.readObject(in)); |
| } |
| } |
| |
| @Override |
| public void toData(DataOutput out) throws IOException { |
| out.writeInt(size()); |
| ObjectTypeImpl ctImpl = (ObjectTypeImpl) this.getCollectionType().getElementType(); |
| Assert.assertTrue(ctImpl != null, "ctImpl can not be null"); |
| InternalDataSerializer.invokeToData(ctImpl, out); |
| for (Iterator itr = this.iterator(); itr.hasNext();) { |
| DataSerializer.writeObject(itr.next(), out); |
| } |
| } |
| |
| @Override |
| public Version[] getSerializationVersions() { |
| return null; |
| } |
| } |