001 /* This file is part of the project "Hilbert II" - http://www.qedeq.org
002 *
003 * Copyright 2000-2013, Michael Meyling <mime@qedeq.org>.
004 *
005 * "Hilbert II" is free software; you can redistribute
006 * it and/or modify it under the terms of the GNU General Public
007 * License as published by the Free Software Foundation; either
008 * version 2 of the License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
013 * GNU General Public License for more details.
014 */
015
016 package org.qedeq.kernel.xml.handler.module;
017
018 import org.qedeq.kernel.se.base.module.InitialPredicateDefinition;
019 import org.qedeq.kernel.se.dto.module.InitialPredicateDefinitionVo;
020 import org.qedeq.kernel.xml.common.XmlSyntaxException;
021 import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler;
022 import org.qedeq.kernel.xml.handler.common.SimpleAttributes;
023 import org.qedeq.kernel.xml.handler.list.ElementHandler;
024
025
026 /**
027 * Parse an initial predicate definition.
028 *
029 * @author Michael Meyling
030 */
031 public class InitialPredicateDefinitionHandler extends AbstractSimpleHandler {
032
033 /** Handler for an element. */
034 private final ElementHandler elementHandler;
035
036 /** Handler for predicate description. */
037 private final LatexListHandler descriptionHandler;
038
039 /** Definition value object. */
040 private InitialPredicateDefinitionVo definition;
041
042 /** LaTeX pattern for the definition. */
043 private String latexPattern;
044
045
046 /**
047 * Deals with definitions.
048 *
049 * @param handler Parent handler.
050 */
051 public InitialPredicateDefinitionHandler(final AbstractSimpleHandler handler) {
052 super(handler, "DEFINITION_PREDICATE_INITIAL");
053 elementHandler = new ElementHandler(this);
054 descriptionHandler = new LatexListHandler(this, "DESCRIPTION");
055 }
056
057 public final void init() {
058 definition = null;
059 latexPattern = null;
060 }
061
062 /**
063 * Get definition.
064 *
065 * @return Definition.
066 */
067 public final InitialPredicateDefinition getInitialDefinition() {
068 return definition;
069 }
070
071 public final void startElement(final String name, final SimpleAttributes attributes)
072 throws XmlSyntaxException {
073 if (getStartTag().equals(name)) {
074 definition = new InitialPredicateDefinitionVo();
075 definition.setArgumentNumber(attributes.getString("arguments"));
076 definition.setName(attributes.getString("name"));
077 } else if ("LATEXPATTERN".equals(name)) {
078 // nothing to do yet
079 } else if ("PREDCON".equals(name)) {
080 changeHandler(elementHandler, name, attributes);
081 } else if (descriptionHandler.getStartTag().equals(name)) {
082 changeHandler(descriptionHandler, name, attributes);
083 } else {
084 throw XmlSyntaxException.createUnexpectedTagException(name);
085 }
086 }
087
088 public final void endElement(final String name) throws XmlSyntaxException {
089 if (getStartTag().equals(name)) {
090 // nothing to do
091 } else if ("LATEXPATTERN".equals(name)) {
092 definition.setLatexPattern(latexPattern);
093 } else if ("PREDCON".equals(name)) {
094 definition.setPredCon(elementHandler.getElement());
095 } else if (descriptionHandler.getStartTag().equals(name)) {
096 definition.setDescription(descriptionHandler.getLatexList());
097 } else {
098 throw XmlSyntaxException.createUnexpectedTagException(name);
099 }
100 }
101
102 public final void characters(final String name, final String data) {
103 if ("LATEXPATTERN".equals(name)) {
104 latexPattern = data;
105 } else {
106 throw new RuntimeException("Unexpected character data in tag: " + name);
107 }
108 }
109
110
111 }
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