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/*******************************************************************************
* Copyright (c) 2005-2009 itemis AG (http://www.itemis.eu) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
*******************************************************************************/
package org.eclipse.xpand2;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.internal.xpand2.model.XpandDefinition;
import org.eclipse.internal.xpand2.model.XpandResource;
import org.eclipse.xtend.expression.AnalysationIssue;
import org.eclipse.xtend.expression.EvaluationException;
import org.eclipse.xtend.expression.ExecutionContext;
import org.eclipse.xtend.expression.Variable;
import org.eclipse.xtend.typesystem.Type;
/**
* *
*
* @author Sven Efftinge (http://www.efftinge.de) *
*/
public class XpandFacade {
private XpandExecutionContext ctx = null;
/**
* @deprecated use XpandFacade.create instead
*/
public XpandFacade(final XpandExecutionContext ctx) {
this.ctx = ctx;
}
public void evaluate(final String definitionName, final Object targetObject, Object... params) {
params = params == null ? new Object[0] : params;
final Type targetType = ctx.getType(targetObject);
final Type[] paramTypes = new Type[params.length];
for (int i = 0; i < paramTypes.length; i++) {
paramTypes[i] = ctx.getType(params[i]);
}
final XpandDefinition def = ctx.findDefinition(definitionName, targetType, paramTypes);
if (def == null)
throw new EvaluationException("No Definition " + definitionName + getParamString(paramTypes) + " for "
+ targetType.getName() + " could be found!", null, ctx);
ctx = (XpandExecutionContext) ctx.cloneWithVariable(new Variable(ExecutionContext.IMPLICIT_VARIABLE,
targetObject));
for (int i = 0; i < params.length; i++) {
final Variable v = new Variable(def.getParams()[i].getName().getValue(), params[i]);
ctx = (XpandExecutionContext) ctx.cloneWithVariable(v);
}
ctx = (XpandExecutionContext) ctx.cloneWithResource(def.getOwner());
def.evaluate(ctx);
}
private String getParamString(final Type[] paramTypes) {
if (paramTypes.length == 0)
return "";
final StringBuffer buff = new StringBuffer("(");
for (int i = 0; i < paramTypes.length; i++) {
final Type t = paramTypes[i];
buff.append(t.getName());
if (i + 1 < paramTypes.length) {
buff.append(",");
}
}
buff.append(")");
return buff.toString();
}
public AnalysationIssue[] analyze(final String templateName) {
final Set<AnalysationIssue> issues = new HashSet<AnalysationIssue>();
final XpandResource tpl = ctx.findTemplate(templateName);
tpl.analyze(ctx, issues);
return issues.toArray(new AnalysationIssue[issues.size()]);
}
public static XpandFacade create(XpandExecutionContextImpl execCtx) {
return new XpandFacade(execCtx);
}
}
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