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/*
* Copyright (c) 2014 CEA 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:
* Christian W. Damus (CEA) - Initial API and implementation
*
*/
package org.eclipse.papyrus.infra.core.resource;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
import com.google.common.collect.ImmutableSet;
/**
* An useful default implementation of the {@link IRollbackStatus} interface.
* Rollback is always an {@linkplain IStatus#ERROR error} condition, so the constructors do not require the severity.
*/
public class RollbackStatus extends Status implements IRollbackStatus {
private final Set<?> causalObjects;
/**
* Initializes me with the source bundle ID, reason code, and message.
*
* @param pluginId
* the source bundle ID
* @param reason
* the {@linkplain IRollbackStatus#UNKNOWN_REASON reason code} indicating why rollback occurred
* @param message
* the human-readable message
*/
public RollbackStatus(String pluginId, int reason, String message) {
this(pluginId, reason, message, null, null);
}
/**
* Initializes me with the source bundle ID, reason code, and message.
*
* @param pluginId
* the source bundle ID
* @param reason
* the {@linkplain IRollbackStatus#UNKNOWN_REASON reason code} indicating why rollback occurred
* @param message
* the human-readable message
* @param exception
* an exception that somehow caused the rollback to occur
*/
public RollbackStatus(String pluginId, int reason, String message, Throwable exception) {
this(pluginId, reason, message, null, exception);
}
/**
* Initializes me with the source bundle ID, reason code, and message.
*
* @param pluginId
* the source bundle ID
* @param reason
* the {@linkplain IRollbackStatus#UNKNOWN_REASON reason code} indicating why rollback occurred
* @param message
* the human-readable message
* @param causalObjects
* the objects that caused the rollback (may be {@code null} if not needed)
*/
public RollbackStatus(String pluginId, int reason, String message, Iterable<?> causalObjects) {
this(pluginId, reason, message, causalObjects, null);
}
/**
* Initializes me with the source bundle ID, reason code, and message.
*
* @param pluginId
* the source bundle ID
* @param reason
* the {@linkplain IRollbackStatus#UNKNOWN_REASON reason code} indicating why rollback occurred
* @param message
* the human-readable message
* @param causalObjects
* the objects that caused the rollback (may be {@code null} if not needed)
* @param exception
* an exception that somehow caused the rollback to occur
*/
public RollbackStatus(String pluginId, int reason, String message, Iterable<?> causalObjects, Throwable exception) {
super(IStatus.ERROR, pluginId, reason, message, exception);
this.causalObjects = (causalObjects == null) ? Collections.emptySet() : ImmutableSet.copyOf(causalObjects);
}
@Override
public Collection<?> getCausalObjects() {
return causalObjects;
}
/**
* Dig through a possibly {@linkplain #isMultiStatus() multi} status to get a rollback status out of it.
*
* @param status
* a status
*
* @return the embedded rollback status, if any (which could be the {@code status}, itself, in the simplest case)
*/
public static IRollbackStatus findRollbackStatus(IStatus status) {
IRollbackStatus result = null;
if(status instanceof IRollbackStatus) {
result = (IRollbackStatus)status;
} else if(status.isMultiStatus()) {
IStatus[] children = status.getChildren();
for(int i = 0; (result == null) && (i < children.length); i++) {
result = findRollbackStatus(children[i]);
}
}
return result;
}
//
// Nested types
//
public static class Multi extends MultiStatus implements IRollbackStatus {
private IRollbackStatus rollback;
public Multi(String pluginId, int code, IStatus[] newChildren, String message, Throwable exception) {
super(pluginId, code, newChildren, message, exception);
}
public Multi(String pluginId, int code, String message, Throwable exception) {
super(pluginId, code, message, exception);
}
IRollbackStatus getRollback() {
if(rollback == null) {
rollback = findRollbackStatus(this);
}
return rollback;
}
@Override
public Collection<?> getCausalObjects() {
IRollbackStatus rollback = getRollback();
return (rollback == null) ? Collections.emptySet() : rollback.getCausalObjects();
}
}
}
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