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/*******************************************************************************
* Copyright (c) 2005, 2007 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.internal.xtend.xtend.ast;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.Stack;
import org.eclipse.internal.xtend.expression.ast.DeclaredParameter;
import org.eclipse.internal.xtend.expression.ast.Expression;
import org.eclipse.internal.xtend.expression.ast.Identifier;
import org.eclipse.xtend.expression.AnalysationIssue;
import org.eclipse.xtend.expression.ExecutionContext;
import org.eclipse.xtend.expression.Variable;
import org.eclipse.xtend.typesystem.Type;
public class ExpressionExtensionStatement extends AbstractExtension {
private Expression expression;
public ExpressionExtensionStatement(final Identifier name,
final Identifier returnType,
final List<DeclaredParameter> formalParameters,
final Expression expression, final boolean cached,
final boolean isPrivate) {
super(name, returnType, formalParameters, cached, isPrivate);
this.expression = expression;
}
public Expression getExpression() {
return expression;
}
private final Stack<List<Type>> analyzations = new Stack<List<Type>>();
@Override
public Object evaluateInternal(final Object[] parameters,
final ExecutionContext ctx) {
return evaluateInternal2(parameters, ctx);
}
protected Object evaluateInternal2(final Object[] parameters,
ExecutionContext ctx) {
ctx = ctx.cloneWithoutVariables();
ctx = ctx.cloneWithResource(file);
final List<String> paramNames = getParameterNames();
for (int i = 0, x = paramNames.size(); i < x; i++) {
final String name = paramNames.get(i);
ctx = ctx.cloneWithVariable(new Variable(name, parameters[i]));
}
return expression.evaluate(ctx);
}
@Override
public void analyzeInternal(final ExecutionContext ctx,
final Set<AnalysationIssue> issues) {
if (expression != null)
expression.analyze(ctx, issues);
}
@Override
protected Type internalGetReturnType(final Type[] parameters,
final ExecutionContext ctx, final Set<AnalysationIssue> issues) {
if (getReturnTypeIdentifier() != null)
return ctx.getTypeForName(getReturnTypeIdentifier().getValue());
if (parameters == null
|| parameters.length != getParameterNames().size())
return null;
final List<Type> params = Arrays.asList(parameters);
if (!analyzations.contains(params)) {
analyzations.push(params);
try {
return analyzeInternal(parameters, ctx, issues);
} finally {
analyzations.pop();
}
} else {
if (returnType == null) {
issues
.add(new AnalysationIssue(
AnalysationIssue.INTERNAL_ERROR,
"Recursive extensions need to have a return type specified!",
this));
return null;
}
return ctx.getTypeForName(returnType.getValue());
}
}
protected Type analyzeInternal(final Type[] parameters,
ExecutionContext ctx, final Set<AnalysationIssue> issues) {
ctx = ctx.cloneWithoutVariables();
ctx = ctx.cloneWithResource(file);
final List<String> paramNames = getParameterNames();
for (int i = 0, x = paramNames.size(); i < x; i++) {
final String name = paramNames.get(i);
final Type t = parameters[i];
ctx = ctx.cloneWithVariable(new Variable(name, t));
}
return expression.analyze(ctx, issues);
}
}
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