PrefixQueryExpression.java

/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.atlas.catalog.query;

import org.apache.atlas.catalog.definition.ResourceDefinition;
import org.apache.lucene.search.PrefixQuery;

/**
 * Expression that evaluates whether a property starts with a prefix.
 */
public class PrefixQueryExpression extends BaseQueryExpression {

    // query 'f*' results in a PrefixQuery
    public PrefixQueryExpression(PrefixQuery query, ResourceDefinition resourceDefinition) {
        super(query.getPrefix().field(), query.getPrefix().text(), resourceDefinition);
    }

    @Override
    public boolean evaluate(Object value) {
        return value != null && String.valueOf(value).startsWith(getExpectedValue());
    }

}