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This file 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.

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The source code

// $Header: /home/cvs/jakarta-jmeter/src/htmlparser/org/htmlparser/scanners/BulletScanner.java,v 1.2 2004/02/10 13:41:09 woolfel Exp $
/*
 * ====================================================================
 * Copyright 2002-2004 The Apache Software Foundation.
 *
 * 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 developers of JMeter and Apache are greatful to the developers
// of HTMLParser for giving Apache Software Foundation a non-exclusive
// license. The performance benefits of HTMLParser are clear and the
// users of JMeter will benefit from the hard work the HTMLParser
// team. For detailed information about HTMLParser, the project is
// hosted on sourceforge at http://htmlparser.sourceforge.net/.
//
// HTMLParser was originally created by Somik Raha in 2000. Since then
// a healthy community of users has formed and helped refine the
// design so that it is able to tackle the difficult task of parsing
// dirty HTML. Derrick Oswald is the current lead developer and was kind
// enough to assist JMeter.

package org.htmlparser.scanners;

import java.util.Stack;

import org.htmlparser.tags.Bullet;
import org.htmlparser.tags.Tag;
import org.htmlparser.tags.data.CompositeTagData;
import org.htmlparser.tags.data.TagData;
import org.htmlparser.util.ParserException;

/**
 * This scanner is created by BulletListScanner. It shares a stack to maintain the parent-child relationship
 * with BulletListScanner. The rules implemented are :
* [1] A <ul> can have <li> under it
* [2] A <li> can have <ul> under it
* [3] A <li> cannot have <li> under it
*

* These rules are implemented easily through the shared stack. */ public class BulletScanner extends CompositeTagScanner { private static final String[] MATCH_STRING = { "LI" }; private final static String ENDERS[] = { "BODY", "HTML" }; private final static String END_TAG_ENDERS[] = { "UL" }; private Stack ulli; public BulletScanner(Stack ulli) { this("", ulli); } public BulletScanner(String filter, Stack ulli) { super(filter, MATCH_STRING, ENDERS, END_TAG_ENDERS, false); this.ulli = ulli; } public Tag createTag(TagData tagData, CompositeTagData compositeTagData) throws ParserException { return new Bullet(tagData, compositeTagData); } public String[] getID() { return MATCH_STRING; } /** * This is the logic that decides when a bullet tag can be allowed */ public boolean shouldCreateEndTagAndExit() { if (ulli.size() == 0) return false; CompositeTagScanner parentScanner = (CompositeTagScanner) ulli.peek(); if (parentScanner == this) { ulli.pop(); return true; } else return false; } public void beforeScanningStarts() { ulli.push(this); } }

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