| /* |
| * <copyright> |
| * |
| * Copyright (c) 2005-2006 Sven Efftinge 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: |
| * Sven Efftinge - Initial API and implementation |
| * |
| * </copyright> |
| */ |
| package org.eclipse.gmf.internal.xpand.ast; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.eclipse.emf.ecore.EClassifier; |
| import org.eclipse.emf.ecore.EcorePackage; |
| import org.eclipse.gmf.internal.xpand.BuiltinMetaModel; |
| import org.eclipse.gmf.internal.xpand.expression.AnalysationIssue; |
| import org.eclipse.gmf.internal.xpand.expression.EvaluationException; |
| import org.eclipse.gmf.internal.xpand.expression.Variable; |
| import org.eclipse.gmf.internal.xpand.expression.ast.Expression; |
| import org.eclipse.gmf.internal.xpand.expression.ast.Identifier; |
| import org.eclipse.gmf.internal.xpand.migration.ForEachAnalyzeTrace; |
| import org.eclipse.gmf.internal.xpand.model.XpandExecutionContext; |
| import org.eclipse.gmf.internal.xpand.model.XpandIterator; |
| |
| /** |
| * @author Sven Efftinge |
| */ |
| public class ForEachStatement extends Statement { |
| |
| public static final String ITERATOR_VAR_NAME = "iterator"; |
| |
| private final Statement[] body; |
| |
| private final Expression target; |
| |
| private final Expression separator; |
| |
| private final Identifier variable; |
| |
| private final Identifier iteratorName; |
| |
| public ForEachStatement(final int start, final int end, final int line, final int startOffset, final int endOffset, final Identifier variable, |
| final Expression target, final Statement[] body, final Expression separator, final Identifier iterator) { |
| super(start, end, line, startOffset, endOffset); |
| this.variable = variable; |
| this.target = target; |
| this.body = body; |
| this.separator = separator; |
| iteratorName = iterator; |
| } |
| |
| public Statement[] getBody() { |
| return body; |
| } |
| |
| public Expression getSeparator() { |
| return separator; |
| } |
| |
| public Expression getTarget() { |
| return target; |
| } |
| |
| public Identifier getVariable() { |
| return variable; |
| } |
| |
| public void analyze(XpandExecutionContext ctx, final Set<AnalysationIssue> issues) { |
| EClassifier t = getTarget().analyze(ctx, issues); |
| EClassifier sepT = null; |
| if (getSeparator() != null) { |
| sepT = getSeparator().analyze(ctx, issues); |
| if (!BuiltinMetaModel.isAssignableFrom(EcorePackage.eINSTANCE.getEString(), sepT)) { |
| issues.add(new AnalysationIssue(AnalysationIssue.Type.INCOMPATIBLE_TYPES, "String expected!", target)); |
| } |
| } |
| createAnalyzeTrace(ctx, new ForEachAnalyzeTrace(t, sepT)); |
| if (t != null) { |
| if (BuiltinMetaModel.isCollectionType(t)) { |
| if (BuiltinMetaModel.isParameterizedType(t)) { |
| t = BuiltinMetaModel.getInnerType(t); |
| } else { |
| t = EcorePackage.eINSTANCE.getEJavaObject(); |
| } |
| } else { |
| issues.add(new AnalysationIssue(AnalysationIssue.Type.INCOMPATIBLE_TYPES, "Collection type expected!", |
| target)); |
| return; |
| } |
| } |
| ctx = ctx.cloneWithVariable(new Variable(getVariable().getValue(), t)); |
| if (iteratorName != null) { |
| ctx = ctx.cloneWithVariable(new Variable(iteratorName.getValue(), BuiltinMetaModel.ITERATOR_TYPE)); |
| } |
| for (Statement statement : getBody()) { |
| statement.analyze(ctx, issues); |
| } |
| } |
| |
| @Override |
| public void evaluateInternal(XpandExecutionContext ctx) { |
| final Object o = getTarget().evaluate(ctx); |
| |
| if (!(o instanceof Collection)) { |
| throw new EvaluationException("Collection expected!", getTarget()); |
| } |
| final Collection<?> col = (Collection<?>) o; |
| final String sep = (String) (getSeparator() != null ? getSeparator().evaluate(ctx) : null); |
| final XpandIterator iterator = new XpandIterator(col.size()); |
| |
| if (iteratorName != null) { |
| ctx = ctx.cloneWithVariable(new Variable(iteratorName.getValue(), iterator)); |
| } |
| for (final Iterator<?> iter = col.iterator(); iter.hasNext();) { |
| final Object element = iter.next(); |
| ctx = ctx.cloneWithVariable(new Variable(getVariable().getValue(), element)); |
| for (int i = 0; i < getBody().length; i++) { |
| getBody()[i].evaluate(ctx); |
| } |
| if ((sep != null) && iter.hasNext()) { |
| ctx.getOutput().write(sep); |
| } |
| iterator.increment(); |
| } |
| } |
| } |