blob: b33fcf4c43a293cd4e9ef7cb2813bb7d3d7212ea [file] [log] [blame]
/*
* 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;
import org.apache.nifi.expression.AttributeValueDecorator;
import org.apache.nifi.processor.exception.ProcessException;
import java.util.Collections;
import java.util.Set;
public class EmptyPreparedQuery implements PreparedQuery {
private final String value;
EmptyPreparedQuery(final String value) {
this.value = value;
}
@Override
public String evaluateExpressions(final EvaluationContext evaluationContext, final AttributeValueDecorator decorator) throws ProcessException {
return value;
}
@Override
public boolean isExpressionLanguagePresent() {
return false;
}
@Override
public VariableImpact getVariableImpact() {
return VariableImpact.NEVER_IMPACTED;
}
@Override
public Set<String> getExplicitlyReferencedAttributes() {
return Collections.emptySet();
}
}