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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| AbstractSimpleHandler.java | 50% | 85,7% | 87,5% | 83,3% |
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| 1 | /* $Id: AbstractSimpleHandler.java,v 1.5 2006/10/20 20:23:04 m31 Exp $ | |
| 2 | * | |
| 3 | * This file is part of the project "Hilbert II" - http://www.qedeq.org | |
| 4 | * | |
| 5 | * Copyright 2000-2006, Michael Meyling <mime@qedeq.org>. | |
| 6 | * | |
| 7 | * "Hilbert II" is free software; you can redistribute | |
| 8 | * it and/or modify it under the terms of the GNU General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | */ | |
| 17 | ||
| 18 | package org.qedeq.kernel.xml.parser; | |
| 19 | ||
| 20 | ||
| 21 | /** | |
| 22 | * Simple handler that gets SAX parser events. These events were received by the | |
| 23 | * {@link org.qedeq.kernel.xml.parser.SaxDefaultHandler} and are delegated to the | |
| 24 | * current {@link AbstractSimpleHandler}. | |
| 25 | * | |
| 26 | * @version $Revision: 1.5 $ | |
| 27 | * @author Michael Meyling | |
| 28 | */ | |
| 29 | public abstract class AbstractSimpleHandler { | |
| 30 | ||
| 31 | /** This handler gets the original SAX events. */ | |
| 32 | private final SaxDefaultHandler defaultHandler; | |
| 33 | ||
| 34 | /** Start tag for this handler .*/ | |
| 35 | private final String startTag; | |
| 36 | ||
| 37 | /** | |
| 38 | * Constructor. | |
| 39 | * | |
| 40 | * @param defaultHandler Original SAX event handler. | |
| 41 | * @param startTag Start tag for this handler. | |
| 42 | */ | |
| 43 | 110 | public AbstractSimpleHandler(final SaxDefaultHandler defaultHandler, final String startTag) { |
| 44 | 110 | this.defaultHandler = defaultHandler; |
| 45 | 110 | this.startTag = startTag; |
| 46 | } | |
| 47 | ||
| 48 | /** | |
| 49 | * Constructor. | |
| 50 | * | |
| 51 | * @param defaultHandler Original SAX event handler. | |
| 52 | */ | |
| 53 | 140 | public AbstractSimpleHandler(final SaxDefaultHandler defaultHandler) { |
| 54 | 140 | this.defaultHandler = defaultHandler; |
| 55 | 140 | this.startTag = null; |
| 56 | } | |
| 57 | ||
| 58 | /** | |
| 59 | * Constructor, should be used for creating handlers within handlers. | |
| 60 | * | |
| 61 | * @param handler Already existing simple handler. | |
| 62 | * @param startTag Start tag for this handler. | |
| 63 | */ | |
| 64 | 1323 | public AbstractSimpleHandler(final AbstractSimpleHandler handler, final String startTag) { |
| 65 | 1323 | this.defaultHandler = handler.defaultHandler; |
| 66 | 1323 | this.startTag = startTag; |
| 67 | } | |
| 68 | ||
| 69 | /** | |
| 70 | * Constructor, should be used for creating handlers within handlers. | |
| 71 | * | |
| 72 | * @param handler Already existing simple handler. | |
| 73 | */ | |
| 74 | 162 | public AbstractSimpleHandler(final AbstractSimpleHandler handler) { |
| 75 | 162 | this.defaultHandler = handler.defaultHandler; |
| 76 | 162 | this.startTag = null; |
| 77 | } | |
| 78 | ||
| 79 | /** | |
| 80 | * Must be called before a handler should parse a new section. | |
| 81 | */ | |
| 82 | public abstract void init(); | |
| 83 | ||
| 84 | /** | |
| 85 | * Called at begin of element <code>elementName</code>. Must be overwritten. | |
| 86 | * | |
| 87 | * @param elementName Tag name. | |
| 88 | * @param attributes Tag attributes. | |
| 89 | * @throws SyntaxException There is a semantic error in this event occurrence. | |
| 90 | */ | |
| 91 | public abstract void startElement(final String elementName, final SimpleAttributes attributes) | |
| 92 | throws SyntaxException; | |
| 93 | ||
| 94 | /** | |
| 95 | * Called at end of element <code>elementName</code>. Must be overwritten. | |
| 96 | * | |
| 97 | * @param elementName Tag name. | |
| 98 | * @throws SyntaxException There is a semantic error in this event occurrence. | |
| 99 | */ | |
| 100 | public abstract void endElement(final String elementName) throws SyntaxException; | |
| 101 | ||
| 102 | /** | |
| 103 | * Called at end of element <code>elementName</code>. Must be overwritten if you expect | |
| 104 | * character data. | |
| 105 | * | |
| 106 | * @param elementName Tag name. | |
| 107 | * @param value String value. | |
| 108 | * @throws SyntaxException There is a semantic error in this event occurrence. | |
| 109 | */ | |
| 110 | 0 | public void characters(final String elementName, final String value) throws SyntaxException { |
| 111 | // default implementation | |
| 112 | 0 | throw SyntaxException.createUnexpectedTextDataException(elementName, value); |
| 113 | } | |
| 114 | ||
| 115 | /** | |
| 116 | * Change current handler to new one. The new handler gets automatically a | |
| 117 | * <code>beginElement</code> event. | |
| 118 | * | |
| 119 | * @param newHandler Handler that gets all the events now. | |
| 120 | * @param elementName Current element name. | |
| 121 | * @param attributes Current element attributes. | |
| 122 | * @throws SyntaxException New handler detected semantical problems. | |
| 123 | */ | |
| 124 | 3666 | public final void changeHandler(final AbstractSimpleHandler newHandler, |
| 125 | final String elementName, final SimpleAttributes attributes) | |
| 126 | throws SyntaxException { | |
| 127 | 3666 | if (newHandler.getStartTag() != null && !newHandler.getStartTag().equals(elementName)) { |
| 128 | 0 | throw new RuntimeException(newHandler.getClass().getName() + " has start tag \"" |
| 129 | + newHandler.getStartTag() + "\", but should start with tag \"" | |
| 130 | + elementName + "\""); | |
| 131 | } | |
| 132 | 3666 | defaultHandler.changeHandler(newHandler, elementName, attributes); |
| 133 | } | |
| 134 | ||
| 135 | /** | |
| 136 | * Get current tag level. | |
| 137 | * | |
| 138 | * @return Current level. | |
| 139 | */ | |
| 140 | 942 | public final int getLevel() { |
| 141 | 942 | return defaultHandler.getLevel(); |
| 142 | } | |
| 143 | ||
| 144 | /** | |
| 145 | * Get start tag for this handler. Could be <code>null</code> if there is no specific start tag. | |
| 146 | * | |
| 147 | * @return Start tag. | |
| 148 | */ | |
| 149 | 43772 | public final String getStartTag() { |
| 150 | 43772 | return startTag; |
| 151 | } | |
| 152 | ||
| 153 | } |
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