Lucene example source code file (PrefixWildcardQueryNode.java)

This example Lucene source code file (PrefixWildcardQueryNode.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

charsequence, charsequence, clonenotsupportedexception, clonenotsupportedexception, override, override, prefixwildcardquerynode, prefixwildcardquerynode, string, wildcardquerynode

The Lucene PrefixWildcardQueryNode.java source code

package org.apache.lucene.queryParser.standard.nodes;

import org.apache.lucene.queryParser.core.nodes.FieldQueryNode;

/**
 * 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.
 */

/**
 * A {@link PrefixWildcardQueryNode} represents wildcardquery that matches abc*
 * or *. This does not apply to phrases, this is a special case on the original
 * lucene parser. TODO: refactor the code to remove this special case from the
 * parser. and probably do it on a Processor
 */
public class PrefixWildcardQueryNode extends WildcardQueryNode {

  private static final long serialVersionUID = 6851557641826407515L;

  /**
   * @param field
   *          - field name
   * @param text
   *          - value including the wildcard
   * @param begin
   *          - position in the query string
   * @param end
   *          - position in the query string
   */
  public PrefixWildcardQueryNode(CharSequence field, CharSequence text,
      int begin, int end) {
    super(field, text, begin, end);
  }

  public PrefixWildcardQueryNode(FieldQueryNode fqn) {
    this(fqn.getField(), fqn.getText(), fqn.getBegin(), fqn.getEnd());
  }

  @Override
  public String toString() {
    return "<prefixWildcard field='" + this.field + "' term='" + this.text
        + "'/>";
  }

  @Override
  public PrefixWildcardQueryNode cloneTree() throws CloneNotSupportedException {
    PrefixWildcardQueryNode clone = (PrefixWildcardQueryNode) super.cloneTree();

    // nothing to do here

    return clone;
  }
}