| 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.dto.module.ConditionalProofVo; |
| 19 | import org.qedeq.kernel.xml.common.XmlSyntaxException; |
| 20 | import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler; |
| 21 | import org.qedeq.kernel.xml.handler.common.SimpleAttributes; |
| 22 | |
| 23 | |
| 24 | /** |
| 25 | * Parse a conditional proof rule usage. |
| 26 | * |
| 27 | * @author Michael Meyling |
| 28 | */ |
| 29 | public class ConditionalProofHandler extends AbstractSimpleHandler { |
| 30 | |
| 31 | /** Rule value object. */ |
| 32 | private ConditionalProofVo conditionalProof; |
| 33 | |
| 34 | /** Handle hypothesis. */ |
| 35 | private HypothesisHandler hypothesisHandler; |
| 36 | |
| 37 | /** Handle elements. */ |
| 38 | private FormalProofLineListHandler proofListHandler; |
| 39 | |
| 40 | /** Handle hypothesis. */ |
| 41 | private ConclusionHandler conclusionHandler; |
| 42 | |
| 43 | /** |
| 44 | * Deals with definitions. |
| 45 | * |
| 46 | * @param handler Parent handler. |
| 47 | */ |
| 48 | public ConditionalProofHandler(final AbstractSimpleHandler handler) { |
| 49 | super(handler, "CP"); |
| 50 | } |
| 51 | |
| 52 | public final void init() { |
| 53 | conditionalProof = null; |
| 54 | // we initialize the parsers only when really needed (so we have no recursive calls) |
| 55 | hypothesisHandler = new HypothesisHandler(this); |
| 56 | proofListHandler = new FormalProofLineListHandler(this); |
| 57 | conclusionHandler = new ConclusionHandler(this); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Get conditional proof usage. |
| 62 | * |
| 63 | * @return Substitute Free Variable usage. |
| 64 | */ |
| 65 | public final ConditionalProofVo getConditionalProofVo() { |
| 66 | return conditionalProof; |
| 67 | } |
| 68 | |
| 69 | public final void startElement(final String name, final SimpleAttributes attributes) |
| 70 | throws XmlSyntaxException { |
| 71 | if (getStartTag().equals(name)) { |
| 72 | // ok |
| 73 | } else if (hypothesisHandler.getStartTag().equals(name)) { |
| 74 | changeHandler(hypothesisHandler, name, attributes); |
| 75 | } else if (proofListHandler.getStartTag().equals(name)) { |
| 76 | changeHandler(proofListHandler, name, attributes); |
| 77 | } else if (conclusionHandler.getStartTag().equals(name)) { |
| 78 | changeHandler(conclusionHandler, name, attributes); |
| 79 | } else { |
| 80 | throw XmlSyntaxException.createUnexpectedTagException(name); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | public final void endElement(final String name) throws XmlSyntaxException { |
| 85 | if (getStartTag().equals(name)) { |
| 86 | conditionalProof = new ConditionalProofVo(hypothesisHandler.getHypothesis(), |
| 87 | proofListHandler.getFormalProofLineList(), |
| 88 | conclusionHandler.getConclusion()); |
| 89 | } else if (hypothesisHandler.getStartTag().equals(name)) { |
| 90 | // ok |
| 91 | } else if (proofListHandler.getStartTag().equals(name)) { |
| 92 | // ok |
| 93 | } else if (conclusionHandler.getStartTag().equals(name)) { |
| 94 | // ok |
| 95 | } else { |
| 96 | throw XmlSyntaxException.createUnexpectedTagException(name); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | } |