001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.core;
054:
055: import java.io.IOException;
056: import java.util.*;
057: import freemarker.template.TemplateException;
058:
059: /**
060: * An instruction that contains one or more assignments
061: */
062: final class AssignmentInstruction extends TemplateElement {
063:
064: private int scope;
065: private Expression namespaceExp;
066:
067: AssignmentInstruction(int scope) {
068: this .scope = scope;
069: nestedElements = new ArrayList(1);
070: }
071:
072: void addAssignment(Assignment ass) {
073: nestedElements.add(ass);
074: }
075:
076: void setNamespaceExp(Expression namespaceExp) {
077: this .namespaceExp = namespaceExp;
078: for (int i = 0; i < nestedElements.size(); i++) {
079: ((Assignment) nestedElements.get(i))
080: .setNamespaceExp(namespaceExp);
081: }
082: }
083:
084: void accept(Environment env) throws TemplateException, IOException {
085: for (int i = 0; i < nestedElements.size(); i++) {
086: Assignment ass = (Assignment) nestedElements.get(i);
087: env.visit(ass);
088: }
089: }
090:
091: public String getCanonicalForm() {
092: String tag = "<#local ";
093: if (scope == Assignment.GLOBAL) {
094: tag = "<#global ";
095: } else if (scope == Assignment.NAMESPACE) {
096: tag = "<#assign ";
097: }
098: StringBuffer buf = new StringBuffer(tag);
099: for (int i = 0; i < nestedElements.size(); i++) {
100: Assignment ass = (Assignment) nestedElements.get(i);
101: buf.append(ass.getCanonicalForm());
102: if (i < nestedElements.size() - 1) {
103: buf.append(" ");
104: }
105: }
106: if (namespaceExp != null) {
107: buf.append(" in ");
108: buf.append(namespaceExp.getCanonicalForm());
109: }
110: buf.append("/>");
111: return buf.toString();
112: }
113:
114: public String getDescription() {
115: String tag = "local ";
116: if (scope == Assignment.GLOBAL) {
117: tag = "global ";
118: } else if (scope == Assignment.NAMESPACE) {
119: tag = "assign ";
120: }
121: tag += "assignment";
122: if (nestedElements.size() > 1) {
123: tag += "s";
124: }
125: return tag;
126: }
127:
128: public TemplateElement postParseCleanup(boolean stripWhitespace)
129: throws ParseException {
130: super .postParseCleanup(stripWhitespace);
131: if (nestedElements.size() == 1) {
132: Assignment ass = (Assignment) nestedElements.get(0);
133: ass.setLocation(getTemplate(), this, this);
134: return ass;
135: }
136: return this;
137: }
138: }
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