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/*******************************************************************************
* Copyright (c) 2005, 2006 committers of openArchitectureWare 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
*
* Contributors:
* committers of openArchitectureWare - initial API and implementation
*******************************************************************************/
package org.eclipse.xtend;
import java.io.StringReader;
import java.util.Set;
import org.eclipse.internal.xtend.xtend.ast.Extension;
import org.eclipse.internal.xtend.xtend.ast.ExtensionFile;
import org.eclipse.internal.xtend.xtend.parser.ParseFacade;
import org.eclipse.xtend.expression.AnalysationIssue;
import org.eclipse.xtend.expression.ExecutionContext;
import org.eclipse.xtend.expression.ExecutionContextImpl;
import org.eclipse.xtend.expression.Resource;
import org.eclipse.xtend.expression.TypeSystemImpl;
import org.eclipse.xtend.typesystem.MetaModel;
import org.eclipse.xtend.typesystem.Type;
public class XtendFacade {
private ExecutionContext ctx;
private XtendFacade(final ExecutionContext ctx) {
this.ctx = ctx;
}
public final XtendFacade cloneWithExtensions(String extensionCode) {
return new XtendFacade( ctx.cloneWithResource(parse(extensionCode)));
}
public final void registerMetaModel(final MetaModel mm) {
if (ctx instanceof ExecutionContextImpl) {
((ExecutionContextImpl) ctx).registerMetaModel(mm);
} else {
throw new IllegalStateException("Couldn't register Metamodel - ExecutionContextImpl expected.");
}
}
private ExtensionFile parse(final String extFile) {
return ParseFacade.file(new StringReader(extFile), "nofile");
}
public final static XtendFacade create(final String... extFile) {
return create(new ExecutionContextImpl(new TypeSystemImpl()),extFile);
}
public final static XtendFacade create(ExecutionContext ctx,final String... extFile) {
ctx = ctx.cloneWithResource(new Resource() {
public String getFullyQualifiedName() {
return null;
}
public void setFullyQualifiedName(final String fqn) {
}
public String[] getImportedNamespaces() {
return null;
}
public String[] getImportedExtensions() {
return extFile;
}
});
return new XtendFacade(ctx);
}
public Object call(final String ext, Object... params) {
if (params==null)
params = new Object[] {null};
final Extension extension = ctx.getExtension(ext, params);
if (extension == null)
throw new IllegalArgumentException("Couldn't find extension " + ext);
return extension.evaluate(params, ctx);
}
public Type analyze(final String string, Object[] objects, final Set<AnalysationIssue> issues) {
if (objects == null) {
objects = new Object[0];
}
final Extension extension = ctx.getExtension(string, objects);
final Type[] params = new Type[objects.length];
for (int i = 0; i < params.length; i++) {
params[i] = ctx.getType(objects[i]);
}
return extension.getReturnType(params, ctx, issues);
}
}
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