001 // This file is part of the Attempto Java Packages. 002 // Copyright 2008-2009, Attempto Group, University of Zurich (see http://attempto.ifi.uzh.ch). 003 // 004 // The Attempto Java Packages is free software: you can redistribute it and/or modify it under the 005 // terms of the GNU Lesser General Public License as published by the Free Software Foundation, 006 // either version 3 of the License, or (at your option) any later version. 007 // 008 // The Attempto Java Packages is distributed in the hope that it will be useful, but WITHOUT ANY 009 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 // PURPOSE. See the GNU Lesser General Public License for more details. 011 // 012 // You should have received a copy of the GNU Lesser General Public License along with the Attempto 013 // Java Packages. If not, see http://www.gnu.org/licenses/. 014 015 package ch.uzh.ifi.attempto.preditor.text; 016 017 import ch.uzh.ifi.attempto.chartparser.Terminal; 018 019 /** 020 * This class represents a text element that is a reference to a preceding text element. 021 * 022 * @see RefableTextElement 023 * @author Tobias Kuhn 024 */ 025 public class RefTextElement implements TextElement { 026 027 private RefableTextElement refableTextElement; 028 private String category; 029 private boolean sentenceInitial = false; 030 031 /** 032 * Creates a new reference text element that refers to the given referenceable text element. 033 * 034 * @param refableTextElement The referenceable text element occurring earlier in the text. 035 * @param category The category of the reference text element. 036 */ 037 public RefTextElement(RefableTextElement refableTextElement, String category) { 038 this.refableTextElement = refableTextElement; 039 this.category = category; 040 } 041 042 public String getText() { 043 String t = refableTextElement.getReferenceText(); 044 if (sentenceInitial) { 045 return t.substring(0, 1).toUpperCase() + t.substring(1); 046 } else { 047 return t; 048 } 049 } 050 051 public Terminal getCategory() { 052 return new Terminal(category); 053 } 054 055 public void checkNeighborTextElements(TextElement precedingTextElement, TextElement nextTextElement) { 056 sentenceInitial = (precedingTextElement == null || precedingTextElement.getText().matches("(\\.|\\?|\\!)")); 057 } 058 059 public boolean equals(Object obj) { 060 if (obj instanceof RefTextElement) { 061 RefTextElement other = (RefTextElement) obj; 062 return (this.refableTextElement == other.refableTextElement); 063 } 064 return false; 065 } 066 067 }