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 freemarker.template.*;
057:
058: /**
059: * Representation of the compile-time Escape directive.
060: * @version $Id: EscapeBlock.java,v 1.1 2003/04/22 21:05:01 revusky Exp $
061: * @author Attila Szegedi
062: */
063: class EscapeBlock extends TemplateElement {
064:
065: private final String variable;
066: private final Expression expr;
067: private Expression escapedExpr;
068:
069: EscapeBlock(String variable, Expression expr, Expression escapedExpr) {
070: this .variable = variable;
071: this .expr = expr;
072: this .escapedExpr = escapedExpr;
073: }
074:
075: void setContent(TemplateElement nestedBlock) {
076: this .nestedBlock = nestedBlock;
077: // We don't need it anymore at this point
078: this .escapedExpr = null;
079: }
080:
081: void accept(Environment env) throws TemplateException, IOException {
082: if (nestedBlock != null) {
083: env.visit(nestedBlock);
084: }
085: }
086:
087: Expression doEscape(Expression subst) {
088: return escapedExpr.deepClone(variable, subst);
089: }
090:
091: public String getDescription() {
092: return "escape " + variable + " as " + expr.toString();
093: }
094:
095: public String getCanonicalForm() {
096: return "<#escape " + variable + " as "
097: + expr.getCanonicalForm() + ">"
098: + nestedBlock.getCanonicalForm() + "</#escape>";
099: }
100: }
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