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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.xtend.shared.ui;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.internal.xtend.xtend.parser.ErrorHandler;
import org.eclipse.internal.xtend.xtend.parser.XtendError;
import org.eclipse.xtend.expression.Resource;
import org.eclipse.xtend.shared.ui.core.IXtendXpandResource;
import org.eclipse.xtend.shared.ui.core.builder.XtendXpandMarkerManager;
/**
* Base implementation of the {@link ResourceContributor} interface with common
* used methods.
*
* @author kthoms
* @since 4.1.2
*/
public abstract class ResourceContributorBase implements ResourceContributor {
protected ErrorHandler getErrorHandler(final IStorage source) {
if (source instanceof IFile) {
XtendXpandMarkerManager.deleteMarkers((IFile) source);
}
return new ErrorHandler() {
private boolean hasErrors = false;
public void handleError(XtendError e) {
if (!hasErrors && e.getStart() > 0) {
if (source instanceof IFile) {
IFile f = (IFile) source;
XtendXpandMarkerManager.addErrorMarker(f, e.getMessage(),
IMarker.SEVERITY_ERROR, e.getStart(), e
.getEnd());
hasErrors=true;
}
}
}
};
}
protected abstract void logInfo(String message);
protected abstract void logError(String message, Throwable t);
/**
* @see ResourceContributor#parse(IStorage, IXtendXpandResource)
*/
public final IXtendXpandResource create(final IStorage file, String fqn) {
Resource res = parse(file, fqn);
if (res != null) {
return createExtXptResource(res, file);
}
return null;
}
protected Reader createReader(IStorage resource) {
InputStream in;
try {
in = resource.getContents();
return new InputStreamReader(in);
} catch (final CoreException e1) {
logInfo(e1.getMessage());
return null;
}
}
/**
* Parse the resource file.
*
* @param source
* @return The succesfully
*/
protected abstract Resource parse(IStorage source, String fqn);
protected abstract IXtendXpandResource createExtXptResource(Resource resource,
IStorage source);
}
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