org.apache.lucene.queryparser.flexible.standard.nodes.RegexpQueryNode.java Source code

Introduction

Here is the source code for org.apache.lucene.queryparser.flexible.standard.nodes.RegexpQueryNode.java

Source

/*
 * 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.lucene.queryparser.flexible.standard.nodes;

import org.apache.lucene.queryparser.flexible.core.nodes.FieldableNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl;
import org.apache.lucene.queryparser.flexible.core.nodes.TextableQueryNode;
import org.apache.lucene.queryparser.flexible.core.parser.EscapeQuerySyntax;
import org.apache.lucene.search.RegexpQuery;
import org.apache.lucene.util.BytesRef;

/**
 * A {@link RegexpQueryNode} represents {@link RegexpQuery} query Examples: /[a-z]|[0-9]/
 */
public class RegexpQueryNode extends QueryNodeImpl implements TextableQueryNode, FieldableNode {
    private CharSequence text;
    private CharSequence field;

    /**
     * @param field
     *          - field name
     * @param text
     *          - value that contains a regular expression
     * @param begin
     *          - position in the query string
     * @param end
     *          - position in the query string
     */
    public RegexpQueryNode(CharSequence field, CharSequence text, int begin, int end) {
        this.field = field;
        this.text = text.subSequence(begin, end);
    }

    public BytesRef textToBytesRef() {
        return new BytesRef(text);
    }

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

    @Override
    public RegexpQueryNode cloneTree() throws CloneNotSupportedException {
        RegexpQueryNode clone = (RegexpQueryNode) super.cloneTree();
        clone.field = this.field;
        clone.text = this.text;
        return clone;
    }

    @Override
    public CharSequence getText() {
        return text;
    }

    @Override
    public void setText(CharSequence text) {
        this.text = text;
    }

    @Override
    public CharSequence getField() {
        return field;
    }

    public String getFieldAsString() {
        return field.toString();
    }

    @Override
    public void setField(CharSequence field) {
        this.field = field;
    }

    @Override
    public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) {
        return isDefaultField(field) ? "/" + text + "/" : field + ":/" + text + "/";
    }

}