/*
* 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/
*/
/*
* 22 October 1999: This class added by Holger Arendt.
*/
package freemarker.core;
import java.util.ArrayList;
import java.util.List;
import java.io.Writer;
import freemarker.template.*;
import java.io.IOException;
/**
* A unary operator that calls a TemplateMethodModel. It associates with the
* <tt>Identifier</tt> or <tt>Dot</tt> to its left.
*/
final class MethodCall extends Expression {
private final Expression target;
private final ListLiteral arguments;
MethodCall(Expression target, ArrayList arguments) {
this(target, new ListLiteral(arguments));
}
private MethodCall(Expression target, ListLiteral arguments) {
this.target = target;
this.arguments = arguments;
}
TemplateModel _getAsTemplateModel(Environment env) throws TemplateException
{
TemplateModel targetModel = target.getAsTemplateModel(env);
if (targetModel instanceof TemplateMethodModel) {
TemplateMethodModel targetMethod = (TemplateMethodModel)targetModel;
List argumentStrings =
targetMethod instanceof TemplateMethodModelEx
? arguments.getModelList(env)
: arguments.getValueList(env);
Object result = targetMethod.exec(argumentStrings);
return env.getObjectWrapper().wrap(result);
}
else if (targetModel instanceof Macro) {
Macro func = (Macro) targetModel;
env.setLastReturnValue(null);
if (!func.isFunction) {
throw new TemplateException("A macro cannot be called in an expression.", env);
}
Writer prevOut = env.getOut();
try {
env.setOut(Environment.NULL_WRITER);
env.visit(func, null, arguments.values, null, null);
} catch (IOException ioe) {
throw new InternalError("This should be impossible.");
} finally {
env.setOut(prevOut);
}
return env.getLastReturnValue();
}
else {
throw invalidTypeException(targetModel, target, env, "method");
}
}
public String getCanonicalForm() {
StringBuffer buf = new StringBuffer();
buf.append(target.getCanonicalForm());
buf.append("(");
String list = arguments.getCanonicalForm();
buf.append(list.substring(1, list.length() -1));
buf.append(")");
return buf.toString();
}
TemplateModel getConstantValue() {
return null;
}
boolean isLiteral() {
return false;
}
Expression _deepClone(String name, Expression subst) {
return new MethodCall(target.deepClone(name, subst), (ListLiteral)arguments.deepClone(name, subst));
}
}
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