/*
* Copyright (c) 2003 The Visigoth Software Society. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.core;
import java.io.*;
import java.util.*;
import freemarker.template.*;
/**
* A template element that contains a nested block
* that is transformed according to an instance of T
* TemplateTransformModel
*/
final class TransformBlock extends TemplateElement {
private Expression transformExpression;
Map namedArgs;
/**
* Creates new TransformBlock, with a given transformation
*/
TransformBlock(Expression transformExpression,
Map namedArgs,
TemplateElement nestedBlock) {
this.transformExpression = transformExpression;
this.namedArgs = namedArgs;
this.nestedBlock = nestedBlock;
}
void accept(Environment env)
throws TemplateException, IOException
{
TemplateTransformModel ttm = env.getTransform(transformExpression);
if (ttm != null) {
Map args;
if (namedArgs != null && !namedArgs.isEmpty()) {
args = new HashMap();
for (Iterator it = namedArgs.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
String key = (String) entry.getKey();
Expression valueExp = (Expression) entry.getValue();
TemplateModel value = valueExp.getAsTemplateModel(env);
args.put(key, value);
}
} else {
args = EmptyMap.instance;
}
env.visit(nestedBlock, ttm, args);
}
else {
TemplateModel tm = transformExpression.getAsTemplateModel(env);
throw invalidTypeException(tm, transformExpression, env, "transform");
}
}
public String getCanonicalForm() {
StringBuffer buf = new StringBuffer("<#transform ");
buf.append(transformExpression);
if (namedArgs != null) {
for (Iterator it = namedArgs.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
buf.append(' ');
buf.append(entry.getKey());
buf.append('=');
Expression val = (Expression) entry.getValue();
buf.append(val.getCanonicalForm());
}
}
buf.append(">");
if (nestedBlock != null) {
buf.append(nestedBlock.getCanonicalForm());
}
buf.append("</#transform>");
return buf.toString();
}
public String getDescription() {
return "transform " + transformExpression;
}
}
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