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/*******************************************************************************
* Copyright (c) 2007 compeople AG 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:
* compeople AG (Stefan Liebig) - initial API and implementation
* IBM - continuing development
*******************************************************************************/
package org.eclipse.equinox.p2.tests.artifact.repository.processing;
import java.io.IOException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.artifact.repository.Activator;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.IArtifactDescriptor;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.processing.ProcessingStep;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.processing.ProcessingStepDescriptor;
public class ByteShifter extends ProcessingStep {
protected int operand;
public ByteShifter() {
super();
}
public ByteShifter(int shiftLeft) {
super();
this.operand = shiftLeft;
basicInitialize(null);
}
private void basicInitialize(ProcessingStepDescriptor descriptor) {
// if the status is already set to something that not ok, we've already found a problem.
if (!getStatus().isOK())
return;
int code;
// if there is a descriptor, decide if the "bad case" is an error or info. If no
// descriptor then default to error.
if (descriptor != null)
code = descriptor.isRequired() ? IStatus.ERROR : IStatus.INFO;
else
code = IStatus.ERROR;
// finally, check the actual setup and set the status.
if (operand <= 0)
setStatus(new Status(code, Activator.ID, "ByteShifter operand invalid: " + operand));
}
public void initialize(ProcessingStepDescriptor descriptor, IArtifactDescriptor context) {
super.initialize(descriptor, context);
try {
operand = Integer.valueOf(descriptor.getData()).intValue();
} catch (NumberFormatException e) {
int code = descriptor.isRequired() ? IStatus.ERROR : IStatus.INFO;
setStatus(new Status(code, Activator.ID, "ByteShifter operand specification invalid", e));
return;
}
basicInitialize(descriptor);
}
public void write(int b) throws IOException {
getDestination().write(b == -1 ? b : b << operand);
}
public IStatus getStatus() {
return Status.OK_STATUS;
}
}
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