org.duracloud.syncui.service.SyncProcessStateTransitionValidator Maven / Gradle / Ivy
/*
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://duracloud.org/license/
*/
package org.duracloud.syncui.service;
import org.duracloud.syncui.domain.SyncProcessState;
/**
* This class encapsulates the state change rules for the SyncProcessManager.
*
* @author Daniel Bernstein
*
*/
public class SyncProcessStateTransitionValidator {
/**
*
* @param currentState
* @param newState
* @return true if the state transition is valid
*/
public boolean validate(SyncProcessState from, SyncProcessState to) {
if (from == SyncProcessState.STOPPED) {
if (to == SyncProcessState.STARTING) {
return true;
}
} else if (from == SyncProcessState.STARTING) {
if (to == SyncProcessState.RUNNING || to == SyncProcessState.STOPPING || to == SyncProcessState.ERROR) {
return true;
}
} else if (from == SyncProcessState.RUNNING) {
if (to == SyncProcessState.STOPPING || to == SyncProcessState.PAUSING || to == SyncProcessState.ERROR) {
return true;
}
} else if (from == SyncProcessState.STOPPING) {
if (to == SyncProcessState.STOPPED || to == SyncProcessState.ERROR) {
return true;
}
} else if (from == SyncProcessState.PAUSING) {
if (to == SyncProcessState.PAUSED || to == SyncProcessState.ERROR) {
return true;
}
} else if (from == SyncProcessState.PAUSED) {
if (to == SyncProcessState.RESUMING || to == SyncProcessState.ERROR ||
to == SyncProcessState.STOPPING) {
return true;
}
} else if (from == SyncProcessState.RESUMING) {
if (to == SyncProcessState.RUNNING || to == SyncProcessState.ERROR) {
return true;
}
}
return false;
}
}