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Lucene example source code file (QueryNodeProcessor.java)

This example Lucene source code file (QueryNodeProcessor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

queryconfighandler, queryconfighandler, querynode, querynode, querynodeexception, querynodeexception, querynodeprocessor, querynodeprocessor

The Lucene QueryNodeProcessor.java source code

package org.apache.lucene.queryParser.core.processors;

/**
 * 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.
 */

import org.apache.lucene.queryParser.core.QueryNodeException;
import org.apache.lucene.queryParser.core.config.QueryConfigHandler;
import org.apache.lucene.queryParser.core.nodes.QueryNode;

/**
 * <p>
 * A {@link QueryNodeProcessor} is an interface for classes that process a
 * {@link QueryNode} tree.
 * <p>
 * </p>
 * The implementor of this class should perform some operation on a query node
 * tree and return the same or another query node tree.
 * <p>
 * </p>
 * It also may carry a {@link QueryConfigHandler} object that contains
 * configuration about the query represented by the query tree or the
 * collection/index where it's intended to be executed.
 * <p>
 * </p>
 * In case there is any {@link QueryConfigHandler} associated to the query tree
 * to be processed, it should be set using
 * {@link QueryNodeProcessor#setQueryConfigHandler(QueryConfigHandler)} before
 * {@link QueryNodeProcessor#process(QueryNode)} is invoked.
 * 
 * @see QueryNode
 * @see QueryNodeProcessor
 * @see QueryConfigHandler
 */
public interface QueryNodeProcessor {

  /**
   * Processes a query node tree. It may return the same or another query tree.
   * I should never return <code>null.
   * 
   * @param queryTree
   *          tree root node
   * 
   * @return the processed query tree
   * 
   * @throws QueryNodeException
   */
  public QueryNode process(QueryNode queryTree) throws QueryNodeException;

  /**
   * Sets the {@link QueryConfigHandler} associated to the query tree.
   * 
   * @param queryConfigHandler
   */
  public void setQueryConfigHandler(QueryConfigHandler queryConfigHandler);

  /**
   * Returns the {@link QueryConfigHandler} associated to the query tree if any,
   * otherwise it returns <code>null
   * 
   * @return the {@link QueryConfigHandler} associated to the query tree if any,
   *         otherwise it returns <code>null
   */
  public QueryConfigHandler getQueryConfigHandler();

}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene QueryNodeProcessor.java source code file:



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