com.gemstone.gemfire.cache.query.internal.types.CollectionTypeImpl Maven / Gradle / Ivy
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SnappyData store based off Pivotal GemFireXD
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.cache.query.internal.types;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.*;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.query.types.*;
/**
* Implementation of CollectionType
* @author Eric Zoerner
* @since 4.0
*/
public class CollectionTypeImpl extends ObjectTypeImpl implements CollectionType {
private static final long serialVersionUID = 892402666471396897L;
private ObjectType elementType;
/**
* Empty constructor to satisfy DataSerializer
requirements
*/
public CollectionTypeImpl() {
}
/** Creates a new instance of ObjectTypeImpl */
public CollectionTypeImpl(Class clazz, ObjectType elementType) {
super(clazz);
this.elementType = elementType;
}
public CollectionTypeImpl(String className, ObjectType elementType)
throws ClassNotFoundException {
super(className);
this.elementType = elementType;
}
@Override
public boolean equals(Object obj) {
return super.equals(obj) &&
(obj instanceof CollectionTypeImpl) &&
this.elementType.equals(((CollectionTypeImpl)obj).elementType);
}
@Override
public int hashCode() {
return super.hashCode() ^ this.elementType.hashCode();
}
@Override
public String toString(){
return resolveClass().getName() +
"<" + this.elementType.resolveClass().getName() + ">";
}
public boolean allowsDuplicates() {
Class cls = resolveClass();
return !Set.class.isAssignableFrom(cls) &&
!Map.class.isAssignableFrom(cls) &&
!Region.class.isAssignableFrom(cls);
}
public ObjectType getElementType() {
return this.elementType;
}
public boolean isOrdered() {
Class cls = resolveClass();
return List.class.isAssignableFrom(cls) ||
SortedSet.class.isAssignableFrom(cls) ||
cls.isArray() || LinkedHashSet.class.isAssignableFrom(cls);
}
@Override
public boolean isCollectionType() { return true; }
@Override
public boolean isMapType() { return false; }
@Override
public boolean isStructType() { return false; }
@Override
public int getDSFID() {
return COLLECTION_TYPE_IMPL;
}
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
super.fromData(in);
this.elementType = (ObjectType)DataSerializer.readObject(in);
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
DataSerializer.writeObject(this.elementType, out);
}
}