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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.xpand2.ast;
import java.util.Set;
import org.eclipse.internal.xpand2.pr.ProtectedRegion;
import org.eclipse.internal.xpand2.pr.ProtectedRegionSyntaxException;
import org.eclipse.internal.xtend.expression.ast.Expression;
import org.eclipse.xpand2.XpandExecutionContext;
import org.eclipse.xtend.expression.AnalysationIssue;
import org.eclipse.xtend.expression.EvaluationException;
/**
* *
*
* @author Sven Efftinge (http://www.efftinge.de) *
*/
public class ProtectStatement extends StatementWithBody {
private Expression commentStart;
private Expression commentEnd;
private Expression id;
private boolean disable;
public ProtectStatement( final Expression commentStart,
final Expression commentEnd, final Statement[] body, final Expression id, final boolean disable) {
super(body);
this.commentStart = commentStart;
this.commentEnd = commentEnd;
this.id = id;
this.disable = disable;
}
public Expression getCommentEnd() {
return commentEnd;
}
public Expression getCommentStart() {
return commentStart;
}
public Expression getId() {
return id;
}
public boolean getDisable () {
return disable;
}
public void analyzeInternal(final XpandExecutionContext ctx, final Set<AnalysationIssue> issues) {
getCommentStart().analyze(ctx, issues);
getCommentEnd().analyze(ctx, issues);
getId().analyze(ctx, issues);
for (int i = 0; i < body.length; i++) {
body[i].analyze(ctx, issues);
}
}
@Override
public void evaluateInternal(final XpandExecutionContext ctx) {
final String cStart = nullSafe(getCommentStart().evaluate(ctx));
if (cStart == null)
throw new EvaluationException("NullEvaluation!", getCommentStart(), ctx);
final String cEnd = nullSafe(getCommentEnd().evaluate(ctx));
if (cEnd == null)
throw new EvaluationException("NullEvaluation!", getCommentEnd(), ctx);
final String id = nullSafe(getId().evaluate(ctx));
if (id == null)
throw new EvaluationException("NullEvaluation!", getId(), ctx);
ProtectedRegion region = null;
if (ctx.getProtectedRegionResolver() != null) {
region = ctx.getProtectedRegionResolver().getProtectedRegion(id.toString());
} else
throw new EvaluationException("No protected region resolver configured!",this,ctx);
if (region == null) {
region = ctx.getProtectedRegionResolver().createProtectedRegion(id, disable);
ctx.getOutput().write(region.getStartString(cStart, cEnd));
for (int i = 0; i < body.length; i++) {
body[i].evaluate(ctx);
}
ctx.getOutput().write(region.getEndString(cStart, cEnd));
} else {
ctx.getOutput().write(region.getStartString(cStart, cEnd));
try {
ctx.getOutput().write(region.getBody(cStart, cEnd));
} catch (final ProtectedRegionSyntaxException e) {
throw new EvaluationException(e.getMessage(), getId(), ctx);
}
ctx.getOutput().write(region.getEndString(cStart, cEnd));
}
}
private String nullSafe(final Object string) {
return string != null ? string.toString() : "";
}
}
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