home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Lucene example source code file (PhraseSlopQueryNode.java)

This example Lucene source code file (PhraseSlopQueryNode.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, fieldablenode, fieldablenode, float, override, phraseslopquerynode, phraseslopquerynode, querynode, querynode, querynodeexception, querynodeimpl, string

The Lucene PhraseSlopQueryNode.java source code

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

 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

import org.apache.lucene.messages.MessageImpl;
import org.apache.lucene.queryParser.core.QueryNodeError;
import org.apache.lucene.queryParser.core.QueryNodeException;
import org.apache.lucene.queryParser.core.QueryNodeParseException;
import org.apache.lucene.queryParser.core.messages.QueryParserMessages;
import org.apache.lucene.queryParser.core.parser.EscapeQuerySyntax;

public class PhraseSlopQueryNode extends QueryNodeImpl implements FieldableNode {

  private static final long serialVersionUID = 0L;

  private int value = 0;

   * @throws QueryNodeException
   * @throws QueryNodeParseException
   * @exception QueryNodeParseException
   *              throw in overridden method to disallow
  public PhraseSlopQueryNode(QueryNode query, int value)
      throws QueryNodeException {
    if (query == null) {
      throw new QueryNodeError(new MessageImpl(
          QueryParserMessages.NODE_ACTION_NOT_SUPPORTED, "query", "null"));

    this.value = value;

  public QueryNode getChild() {
    return getChildren().get(0);

  public int getValue() {
    return this.value;

  private CharSequence getValueString() {
    Float f = Float.valueOf(this.value);
    if (f == f.longValue())
      return "" + f.longValue();
      return "" + f;


  public String toString() {
    return "<phraseslop value='" + getValueString() + "'>" + "\n"
        + getChild().toString() + "\n</phraseslop>";

  public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) {
    if (getChild() == null)
      return "";
    return getChild().toQueryString(escapeSyntaxParser) + "~"
        + getValueString();

  public QueryNode cloneTree() throws CloneNotSupportedException {
    PhraseSlopQueryNode clone = (PhraseSlopQueryNode) super.cloneTree();

    clone.value = this.value;

    return clone;

  public CharSequence getField() {
    QueryNode child = getChild();

    if (child instanceof FieldableNode) {
      return ((FieldableNode) child).getField();

    return null;


  public void setField(CharSequence fieldName) {
    QueryNode child = getChild();

    if (child instanceof FieldableNode) {
      ((FieldableNode) child).setField(fieldName);



Other Lucene examples (source code examples)

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

my book on functional programming


new blog posts


Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.