com.marklogic.developer.corb.StreamingXPath Maven / Gradle / Ivy

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CoRB is a Java tool designed for bulk content-reprocessing of documents stored in MarkLogic.

There is a newer version: 2.5.6

/*
  * * Copyright (c) 2004-2021 MarkLogic Corporation
  * *
  * * Licensed 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.
  * *
  * * The use of the Apache License does not indicate that this project is
  * * affiliated with the Apache Software Foundation.
 */
package com.marklogic.developer.corb;

import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Compiles an XPath expression into a regex pattern that is used to evaluate
 * matches for an XPath. To be used by a streaming parser, such as SAX or StAX,
 * in order to evaluate a limited subset of XPath expressions for selection of nodes.
 *
 * @author Mads Hansen, MarkLogic Corporation
 * @since 2.4.0
 */
public class StreamingXPath {

    public static final String SLASH = "/";
    public static final String DOUBLE_SLASH = SLASH + SLASH;
    public static final String STAR = "*";
    public static final String CHILD_AXIS = "child::";
    public static final String DESCENDANT_AXIS = "descendant::";
    public static final String SELF_AXIS = "self::";

    private Pattern regexPath;
    private Pattern localNamePattern = Pattern.compile(".*?((?