2 * Copyright (C) 2005 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License.
22 * You must obey the GNU General Public License in all respects for all of the code used
23 * other than the above mentioned libraries. If you modify this file, you may extend this
24 * exception to your version of the file, but you are not obligated to do so.
25 * If you do not wish to do so, delete this exception statement from your version.
27 package mir.generator.tal;
29 import java.util.Iterator;
30 import java.util.List;
33 import mir.generator.tal.interfaces.TALExpressionParser;
34 import mir.generator.Generator;
35 import mir.util.ParameterExpander;
36 import mir.util.RewindableIterator;
38 public class MirExpressionParser implements TALExpressionParser {
39 public Object preparseExpression(String anExpression) {
42 public Object preparseStringExpression(String anExpression) {
46 public Object preparseBooleanExpression(String anExpression) {
50 public Object preparseReferenceExpression(String anExpression) {
54 public Object preparseListExpression(String anExpression) {
58 public Object preparseTRUE() {
62 public Object preparseFALSE() {
66 public Object evaluateExpression(Object aContext, Object aPreparsedExpression) {
68 return ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
71 throw new TALFailure(t);
75 public String evaluateStringExpression(Object aContext, Object aPreparsedExpression) {
77 return ParameterExpander.expandExpression(aContext, (String) aPreparsedExpression);
80 throw new TALFailure(t);
84 public boolean evaluateBooleanExpression(Object aContext, Object aPreparsedExpression) {
86 return ParameterExpander.evaluateBooleanExpression(aContext, (String) aPreparsedExpression);
89 throw new TALFailure(t);
93 public Iterator evaluateListExpression(Object aContext, Object aPreparsedExpression) {
95 Object list = ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
97 if (list instanceof List)
98 return ((List) list).iterator();
100 if (list instanceof RewindableIterator) {
101 ((RewindableIterator) list).rewind();
102 return (RewindableIterator) list;
105 if (list instanceof Iterator) {
106 return (Iterator) list;
109 throw new TALExc("Not a list: " + list);
111 catch (Throwable t) {
112 throw new TALFailure(t);
116 public void processAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aPreparsedExpression) {
118 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression));
120 catch (Throwable t) {
121 throw new TALFailure(t);
125 public void processDirectAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aValue) {
127 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, aValue);
129 catch (Throwable t) {
130 throw new TALFailure(t);
134 public void processPseudoAssignment(Object aContext, String aName, Object aValue) {
136 ParameterExpander.setValueForKey( (Map) aContext, aName, aValue);
138 catch (Throwable t) {
139 throw new TALFailure(t);
143 public Object evaluatePseudoVariable(Object aContext, String aName) {
145 return ParameterExpander.getObjectField(aContext, aName);
147 catch (Throwable t) {
148 throw new TALFailure(t);