/*
* Copyright (c) 2008-2017, Hazelcast, 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.
*/
package com.hazelcast.query.impl.predicates;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.BinaryInterface;
import com.hazelcast.query.Predicate;
import com.hazelcast.query.impl.ComparisonType;
import com.hazelcast.query.impl.Index;
import com.hazelcast.query.impl.QueryContext;
import com.hazelcast.query.impl.QueryableEntry;
import java.io.IOException;
import java.util.Map;
import java.util.Set;
/**
* Greater Less Predicate
*/
@BinaryInterface
public final class GreaterLessPredicate extends AbstractIndexAwarePredicate implements NegatablePredicate {
protected Comparable value;
boolean equal;
boolean less;
public GreaterLessPredicate() {
}
public GreaterLessPredicate(String attribute, Comparable value, boolean equal, boolean less) {
super(attribute);
if (value == null) {
throw new NullPointerException("Arguments can't be null");
}
this.value = value;
this.equal = equal;
this.less = less;
}
@Override
protected boolean applyForSingleAttributeValue(Map.Entry mapEntry, Comparable attributeValue) {
if (attributeValue == null) {
return false;
}
Comparable givenValue = convert(mapEntry, attributeValue, value);
int result = attributeValue.compareTo(givenValue);
return equal && result == 0 || (less ? (result < 0) : (result > 0));
}
@Override
public Set<QueryableEntry> filter(QueryContext queryContext) {
Index index = getIndex(queryContext);
final ComparisonType comparisonType;
if (less) {
comparisonType = equal ? ComparisonType.LESSER_EQUAL : ComparisonType.LESSER;
} else {
comparisonType = equal ? ComparisonType.GREATER_EQUAL : ComparisonType.GREATER;
}
return index.getSubRecords(comparisonType, value);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
super.readData(in);
value = in.readObject();
equal = in.readBoolean();
less = in.readBoolean();
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
super.writeData(out);
out.writeObject(value);
out.writeBoolean(equal);
out.writeBoolean(less);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(attributeName);
sb.append(less ? "<" : ">");
if (equal) {
sb.append("=");
}
sb.append(value);
return sb.toString();
}
@Override
public Predicate negate() {
return new GreaterLessPredicate(attributeName, value, !equal, !less);
}
@Override
public int getId() {
return PredicateDataSerializerHook.GREATERLESS_PREDICATE;
}
}