brooklyn.entity.rebind.dto.MementoValidators Maven / Gradle / Ivy

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package brooklyn.entity.rebind.dto;

import java.util.Collection;
import java.util.Map;

import brooklyn.mementos.BrooklynMemento;
import brooklyn.mementos.EntityMemento;
import brooklyn.mementos.TreeNode;

public class MementoValidators {

    private MementoValidators() {}
    
    public static void validateMemento(BrooklynMemento memento) {
        // TODO Could also validate integrity of entityReferenceAttributes and entityReferenceConfig
        
        Collection locationIds = memento.getLocationIds();
        
        // Ensure every entity's parent/children/locations exists
        validateParentChildRelations(memento.getLocationMementos());
        validateParentChildRelations(memento.getEntityMementos());
        
        for (String id : memento.getEntityIds()) {
            EntityMemento entityMemento = memento.getEntityMemento(id);
            for (String location : entityMemento.getLocations()) {
                if (!locationIds.contains(location)) {
                    throw new IllegalStateException("Location "+location+" missing, for entity "+entityMemento);
                }
            }
        }
    }
    
    private static void validateParentChildRelations(Map nodes) {
        for (Map.Entry entry : nodes.entrySet()) {
            String id = entry.getKey();
            TreeNode node = entry.getValue();
            if (node.getParent() != null && !nodes.containsKey(node.getParent())) {
                throw new IllegalStateException("Parent "+node.getParent()+" missing, for "+node);
            }
            for (String childId : node.getChildren()) {
                if (childId == null) {
                    throw new IllegalStateException("Null child, for "+node);
                }
                if (!nodes.containsKey(childId)) {
                    throw new IllegalStateException("Child "+childId+" missing, for "+node);
                }
            }
        }
    }
}