| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.xml.handler.module; |
| 17 | |
| 18 | import org.qedeq.kernel.se.base.module.Rule; |
| 19 | import org.qedeq.kernel.se.dto.module.RuleVo; |
| 20 | import org.qedeq.kernel.xml.common.XmlSyntaxException; |
| 21 | import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler; |
| 22 | import org.qedeq.kernel.xml.handler.common.SimpleAttributes; |
| 23 | |
| 24 | |
| 25 | /** |
| 26 | * Parse a rule. |
| 27 | * |
| 28 | * @author Michael Meyling |
| 29 | */ |
| 30 | public class RuleHandler extends AbstractSimpleHandler { |
| 31 | |
| 32 | /** Handler for rule description. */ |
| 33 | private final LatexListHandler descriptionHandler; |
| 34 | |
| 35 | /** Handle proofs. */ |
| 36 | private final ProofHandler proofHandler; |
| 37 | |
| 38 | /** Handle rule changes. */ |
| 39 | private final ChangedRuleHandler changedRuleHandler; |
| 40 | |
| 41 | /** Rule value object. */ |
| 42 | private RuleVo rule; |
| 43 | |
| 44 | /** |
| 45 | * Deals with definitions. |
| 46 | * |
| 47 | * @param handler Parent handler. |
| 48 | */ |
| 49 | public RuleHandler(final AbstractSimpleHandler handler) { |
| 50 | super(handler, "RULE"); |
| 51 | descriptionHandler = new LatexListHandler(this, "DESCRIPTION"); |
| 52 | changedRuleHandler = new ChangedRuleHandler(this); |
| 53 | proofHandler = new ProofHandler(this); |
| 54 | } |
| 55 | |
| 56 | public final void init() { |
| 57 | rule = null; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Get Rule. |
| 62 | * |
| 63 | * @return Rule. |
| 64 | */ |
| 65 | public final Rule getRule() { |
| 66 | return rule; |
| 67 | } |
| 68 | |
| 69 | public final void startElement(final String name, final SimpleAttributes attributes) |
| 70 | throws XmlSyntaxException { |
| 71 | if (getStartTag().equals(name)) { |
| 72 | rule = new RuleVo(); |
| 73 | if (null != attributes.getString("name")) { |
| 74 | rule.setName(attributes.getString("name")); |
| 75 | } else { |
| 76 | throw XmlSyntaxException.createMissingAttributeException(name, "name"); |
| 77 | } |
| 78 | if (null != attributes.getString("version")) { |
| 79 | rule.setVersion(attributes.getString("version")); |
| 80 | } else { |
| 81 | throw XmlSyntaxException.createMissingAttributeException(name, "version"); |
| 82 | } |
| 83 | } else if ("LINK".equals(name)) { |
| 84 | if (null != attributes.getString("id")) { |
| 85 | rule.addLink(attributes.getString("id")); |
| 86 | } else { |
| 87 | throw XmlSyntaxException.createMissingAttributeException(name, "id"); |
| 88 | } |
| 89 | } else if (descriptionHandler.getStartTag().equals(name)) { |
| 90 | changeHandler(descriptionHandler, name, attributes); |
| 91 | } else if (proofHandler.getStartTag().equals(name)) { |
| 92 | changeHandler(proofHandler, name, attributes); |
| 93 | } else if (changedRuleHandler.getStartTag().equals(name)) { |
| 94 | changeHandler(changedRuleHandler, name, attributes); |
| 95 | } else { |
| 96 | throw XmlSyntaxException.createUnexpectedTagException(name); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | public final void endElement(final String name) throws XmlSyntaxException { |
| 101 | if (getStartTag().equals(name)) { |
| 102 | // nothing to do |
| 103 | } else if ("LINK".equals(name)) { |
| 104 | // nothing to do |
| 105 | } else if (descriptionHandler.getStartTag().equals(name)) { |
| 106 | rule.setDescription(descriptionHandler.getLatexList()); |
| 107 | } else if (proofHandler.getStartTag().equals(name)) { |
| 108 | rule.addProof(proofHandler.getProof()); |
| 109 | } else if (changedRuleHandler.getStartTag().equals(name)) { |
| 110 | rule.addChangedRule(changedRuleHandler.getChangedRule()); |
| 111 | } else { |
| 112 | throw XmlSyntaxException.createUnexpectedTagException(name); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | |
| 117 | } |