2 * Copyright (C) 2001, 2002 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 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
31 package mir.generator.tal;
33 import java.util.Iterator;
34 import java.util.List;
37 import mir.generator.tal.interfaces.TALExpressionParser;
38 import mir.util.ParameterExpander;
39 import mir.util.RewindableIterator;
41 public class MirExpressionParser implements TALExpressionParser {
42 public Object preparseExpression(String anExpression) {
45 public Object preparseStringExpression(String anExpression) {
49 public Object preparseBooleanExpression(String anExpression) {
53 public Object preparseReferenceExpression(String anExpression) {
57 public Object preparseListExpression(String anExpression) {
61 public Object preparseTRUE() {
65 public Object preparseFALSE() {
69 public Object evaluateExpression(Object aContext, Object aPreparsedExpression) {
71 return ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
74 throw new TALFailure(t);
78 public String evaluateStringExpression(Object aContext, Object aPreparsedExpression) {
80 return ParameterExpander.expandExpression(aContext, (String) aPreparsedExpression);
83 throw new TALFailure(t);
87 public boolean evaluateBooleanExpression(Object aContext, Object aPreparsedExpression) {
89 return ParameterExpander.evaluateBooleanExpression(aContext, (String) aPreparsedExpression);
92 throw new TALFailure(t);
96 public Iterator evaluateListExpression(Object aContext, Object aPreparsedExpression) {
98 Object list = ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression);
100 if (list instanceof List)
101 return ((List) list).iterator();
103 if (list instanceof RewindableIterator) {
104 ((RewindableIterator) list).rewind();
105 return (RewindableIterator) list;
108 if (list instanceof Iterator) {
109 return (Iterator) list;
112 throw new TALExc("Not a list: " + list);
114 catch (Throwable t) {
115 throw new TALFailure(t);
119 public void processAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aPreparsedExpression) {
121 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, ParameterExpander.evaluateExpression(aContext, (String) aPreparsedExpression));
123 catch (Throwable t) {
124 throw new TALFailure(t);
128 public void processDirectAssignment(Object aContext, Object aPreparsedReferenceExpression, Object aValue) {
130 ParameterExpander.setValueForKey( (Map) aContext, (String) aPreparsedReferenceExpression, aValue);
132 catch (Throwable t) {
133 throw new TALFailure(t);
137 public void processPseudoAssignment(Object aContext, String aName, Object aValue) {
139 ParameterExpander.setValueForKey( (Map) aContext, aName, aValue);
141 catch (Throwable t) {
142 throw new TALFailure(t);