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/*
* 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;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.cache.query.SelectResults;
import com.gemstone.gemfire.cache.query.Struct;
import com.gemstone.gemfire.cache.query.internal.types.CollectionTypeImpl;
import com.gemstone.gemfire.cache.query.internal.types.StructTypeImpl;
import com.gemstone.gemfire.cache.query.types.CollectionType;
import com.gemstone.gemfire.cache.query.types.ObjectType;
import com.gemstone.gemfire.internal.DataSerializableFixedID;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import com.gemstone.gemfire.internal.shared.Version;
public class LinkedStructSet extends LinkedHashSet implements
SelectResults, DataSerializableFixedID {
private static final long serialVersionUID = -1687142950781718156L;
protected StructTypeImpl structType;
/**
* Holds value of property modifiable.
*/
private boolean modifiable = true;
/** Creates a new instance of StructSet */
public LinkedStructSet() {
};
/** Creates a new instance of StructSet */
public LinkedStructSet(StructTypeImpl structType) {
if (structType == null) {
throw new IllegalArgumentException(
LocalizedStrings.SortedStructSet_STRUCTTYPE_MUST_NOT_BE_NULL
.toLocalizedString());
}
this.structType = structType;
}
@Override
public boolean equals(Object other) {
if (!(other instanceof SortedStructSet)) {
return false;
}
if (!this.structType.equals(((SortedStructSet)other).structType)) {
return false;
}
return super.equals(other);
}
/** Add a Struct */
@Override
public boolean add(Struct obj) {
if (!(obj instanceof StructImpl)) {
throw new IllegalArgumentException(
LocalizedStrings.SortedStructSet_THIS_SET_ONLY_ACCEPTS_STRUCTIMPL
.toLocalizedString());
}
StructImpl s = (StructImpl)obj;
if (!s.getStructType().equals(this.structType)) {
throw new IllegalArgumentException(
LocalizedStrings.SortedStructSet_OBJ_DOES_NOT_HAVE_THE_SAME_STRUCTTYPE
.toLocalizedString());
}
// return addFieldValues(s.getFieldValues());
return super.add(s);
}
/**
* For internal use. Just add the Object[] values for a struct with same type
*
* public boolean addFieldValues(Object[] fieldValues) { //return
* super.add(fieldValues); StructImpl s = new StructImpl(this.structType,
* fieldValues); return super.add(s); }
*/
/** Does this set contain specified struct? */
@Override
public boolean contains(Object obj) {
if (!(obj instanceof Struct)) {
return false;
}
Struct s = (Struct)obj;
if (!this.structType.equals(StructTypeImpl.typeFromStruct(s))) {
return false;
}
return contains(s);
// return containsFieldValues(s.getFieldValues());
}
/**
* Does this set contain a Struct of the correct type with the specified
* values?
*
* public boolean containsFieldValues(Object[] fieldValues) { return
* super.contains(fieldValues); }
*/
/** Remove the specified Struct */
@Override
public boolean remove(Object o) {
if (!(o instanceof Struct)) {
return false;
}
Struct s = (Struct)o;
if (!this.structType.equals(StructTypeImpl.typeFromStruct(s))) {
return false;
}
return remove(s);
// return removeFieldValues(s.getFieldValues());
}
/**
* Remove the field values from a struct of the correct type public boolean
* removeFieldValues(Object[] fieldValues) { return super.remove(fieldValues);
* }
*/
// downcast StructSets to call more efficient methods
@Override
public boolean addAll(Collection c) {
//if (c instanceof StructSet) {
// return addAll((StructSet)c);
//}
return super.addAll(c);
}
@Override
public boolean removeAll(Collection c) {
//if (c instanceof StructSet) {
//return removeAll((StructSet)c);
//}
return super.removeAll(c);
}
@Override
public boolean retainAll(Collection c) {
//if (c instanceof StructSet) {
//return retainAll((StructSet)c);
//}
return super.retainAll(c);
}
// public boolean addAll(StructSet ss) {
// boolean modified = false;
// if (!this.structType.equals(ss.structType)) { throw new
// IllegalArgumentException(LocalizedStrings.SortedStructSet_TYPES_DONT_MATCH.toLocalizedString());
// }
// for (Iterator itr = ss.fieldValuesIterator(); itr.hasNext();) {
// Struct vals = (Struct) itr.next();
// if (super.add(vals)) {
// modified = true;
// }
// }
// return modified;
// }
// public boolean removeAll(StructSet ss) {
// boolean modified = false;
// if (!this.structType.equals(ss.structType)) { return false; // nothing
// // modified
// }
// for (Iterator itr = ss.fieldValuesIterator(); itr.hasNext();) {
// Struct vals = (Struct) itr.next();
// if (super.remove(vals)) {
// modified = true;
// }
// }
// return modified;
// }
//
// public boolean retainAll(StructSet ss) {
// if (!this.structType.equals(ss.structType)) {
// if (isEmpty()) {
// return false; // nothing modified
// }
// else {
// clear();
// return true; // nothing retained in receiver collection
// }
// }
// boolean changed = false;
// int size = size();
// Iterator it;
// it = fieldValuesIterator();
// while (size-- > 0) {
// Struct val = (Struct) it.next();
// //if (!ss.containsFieldValues(vals)) {
// if (!ss.contains(val)) {
// it.remove();
// changed = true;
// }
// }
// return changed;
// }
/** Returns an Iterator over the Structs in this set */
@Override
public Iterator iterator() {
return new StructIterator(fieldValuesIterator());
}
/** Returns an iterator over the fieldValues Object[] instances */
public Iterator fieldValuesIterator() {
return super.iterator();
}
public CollectionType getCollectionType() {
return new CollectionTypeImpl(SortedSet.class, this.structType);
}
// note: this method is dangerous in that it could result in undefined
// behavior if the new struct type is not compatible with the data.
// For now just trust that the application knows what it is doing if it
// is overriding the element type in a set of structs
public void setElementType(ObjectType elementType) {
if (!(elementType instanceof StructTypeImpl)) {
throw new IllegalArgumentException(
LocalizedStrings.SortedStructSet_ELEMENT_TYPE_MUST_BE_STRUCT
.toLocalizedString());
}
this.structType = (StructTypeImpl)elementType;
}
public List asList() {
return new ArrayList(this);
}
public Set asSet() {
return this;
}
/**
* Getter for property modifiable.
*
* @return Value of property modifiable.
*/
public boolean isModifiable() {
return this.modifiable;
}
public int occurrences(Struct element) {
return contains(element) ? 1 : 0;
}
/**
* Setter for property modifiable.
*
* @param modifiable
* New value of property modifiable.
*/
public void setModifiable(boolean modifiable) {
this.modifiable = modifiable;
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append("[");
Iterator i = iterator();
boolean hasNext = i.hasNext();
while (hasNext) {
Object o = i.next();
buf.append(o == this ? "(this Collection)" : String.valueOf(o));
hasNext = i.hasNext();
if (hasNext)
buf.append(",\n ");
}
buf.append("]");
return buf.toString();
}
/**
* Iterator wrapper to construct Structs on demand.
*/
static private class StructIterator implements Iterator {
private final Iterator itr;
StructIterator(Iterator itr) {
this.itr = itr;
}
public boolean hasNext() {
return this.itr.hasNext();
}
public Object next() {
return this.itr.next();
}
public void remove() {
this.itr.remove();
}
}
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
this.modifiable = in.readBoolean();
int size = in.readInt();
this.structType = (StructTypeImpl)DataSerializer.readObject(in);
for (int j = size; j > 0; j--) {
Object[] fieldValues = DataSerializer.readObject(in);
this.add(new StructImpl(this.structType, fieldValues));
}
}
public int getDSFID() {
return LINKED_STRUCTSET;
}
public void toData(DataOutput out) throws IOException {
// how do we serialize the comparator?
out.writeBoolean(this.modifiable);
out.writeInt(this.size());
DataSerializer.writeObject(this.structType, out);
for (Iterator i = this.iterator(); i.hasNext();) {
Struct struct = i.next();
DataSerializer.writeObject(struct.getFieldValues(), out);
}
}
@Override
public Version[] getSerializationVersions() {
return null;
}
}