/*
* 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.nifi.attribute.expression.language.evaluation.functions;
import java.util.Map;
import org.apache.nifi.attribute.expression.language.evaluation.BooleanEvaluator;
import org.apache.nifi.attribute.expression.language.evaluation.BooleanQueryResult;
import org.apache.nifi.attribute.expression.language.evaluation.Evaluator;
import org.apache.nifi.attribute.expression.language.evaluation.QueryResult;
public class AndEvaluator extends BooleanEvaluator {
private final Evaluator<Boolean> subjectEvaluator;
private final Evaluator<Boolean> rhsEvaluator;
public AndEvaluator(final Evaluator<Boolean> subjectEvaluator, final Evaluator<Boolean> rhsEvaluator) {
this.subjectEvaluator = subjectEvaluator;
this.rhsEvaluator = rhsEvaluator;
}
@Override
public QueryResult<Boolean> evaluate(final Map<String, String> attributes) {
final QueryResult<Boolean> subjectValue = subjectEvaluator.evaluate(attributes);
if (subjectValue == null) {
return new BooleanQueryResult(null);
}
if (Boolean.FALSE.equals(subjectValue.getValue())) {
return new BooleanQueryResult(false);
}
final QueryResult<Boolean> rhsValue = rhsEvaluator.evaluate(attributes);
if (rhsValue == null) {
return new BooleanQueryResult(false);
}
return new BooleanQueryResult(rhsValue.getValue());
}
@Override
public Evaluator<?> getSubjectEvaluator() {
return subjectEvaluator;
}
}