2 * Copyright (C) 2001, 2002 The Mir-coders group
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4 * This file is part of Mir.
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6 * Mir is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * Mir is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with Mir; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 * In addition, as a special exception, The Mir-coders gives permission to link
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21 * the code of this program with any library licensed under the Apache Software License,
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22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
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23 * (or with modified versions of the above that use the same license as the above),
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24 * and distribute linked combinations including the two. You must obey the
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25 * GNU General Public License in all respects for all of the code used other than
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26 * the above mentioned libraries. If you modify this file, you may extend this
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27 * exception to your version of the file, but you are not obligated to do so.
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28 * If you do not wish to do so, delete this exception statement from your version.
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31 package mir.generator.tal;
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33 import java.util.Iterator;
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34 import java.util.List;
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35 import java.util.Map;
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37 import mir.generator.tal.interfaces.TALExpressionParser;
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38 import mir.util.ParameterExpander;
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39 import mir.util.RewindableIterator;
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41 public class MirExpressionParser implements TALExpressionParser {
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42 public Object preparseExpression(String anExpression) {
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43 return anExpression;
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45 public Object preparseStringExpression(String anExpression) {
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46 return anExpression;
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49 public Object preparseBooleanExpression(String anExpression) {
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50 return anExpression;
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53 public Object preparseReferenceExpression(String anExpression) {
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54 return anExpression;
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57 public Object preparseListExpression(String anExpression) {
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58 return anExpression;
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61 public Object preparseTRUE() {
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65 public Object preparseFALSE() {
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69 public Object evaluateExpression(Object aContext, Object aPreparsedExpression) {
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71 return ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
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73 catch (Throwable t) {
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74 throw new TALFailure(t);
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78 public String evaluateStringExpression(Object aContext, Object aPreparsedExpression) {
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80 return ParameterExpander.evaluateStringExpression(aContext, (String) aPreparsedExpression);
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82 catch (Throwable t) {
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83 throw new TALFailure(t);
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87 public boolean evaluateBooleanExpression(Object aContext, Object aPreparsedExpression) {
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89 return ParameterExpander.evaluateBooleanExpression(aContext, (String) aPreparsedExpression);
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91 catch (Throwable t) {
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92 throw new TALFailure(t);
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96 public Iterator evaluateListExpression(Object aContext, Object aPreparsedExpression) {
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98 Object list = ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
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100 if (list instanceof List)
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101 return ((List) list).iterator();
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103 if (list instanceof RewindableIterator) {
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104 ((RewindableIterator) list).rewind();
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105 return (RewindableIterator) list;
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108 if (list instanceof Iterator) {
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109 return (Iterator) list;
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112 throw new TALExc("Not a list: " + list);
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114 catch (Throwable t) {
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115 throw new TALFailure(t);
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119 public void processAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aPreparsedExpression) {
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121 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression));
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123 catch (Throwable t) {
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124 throw new TALFailure(t);
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128 public void processDirectAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aValue) {
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130 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, aValue);
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132 catch (Throwable t) {
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133 throw new TALFailure(t);
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137 public void processPseudoAssignment(Object aContext, String aName, Object aValue) {
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139 ParameterExpander.setValueForKey( (Map) aContext, aName, aValue);
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141 catch (Throwable t) {
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142 throw new TALFailure(t);
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