edu.duke.cabig.c3pr.utils.GridIdentifierInterceptor.java Source code

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Here is the source code for edu.duke.cabig.c3pr.utils.GridIdentifierInterceptor.java

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/*******************************************************************************
 * Copyright Duke Comprehensive Cancer Center and SemanticBits
 * 
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/c3pr/LICENSE.txt for details.
 ******************************************************************************/
package edu.duke.cabig.c3pr.utils;

import java.io.Serializable;
import java.util.UUID;

import org.hibernate.EmptyInterceptor;
import org.hibernate.type.Type;

import gov.nih.nci.cabig.ctms.domain.GridIdentifiable;

/**
 * Wrapper interceptor to add Grid Identifiers to objects which support them. Uses
 * GridIdentifierCreator to delegate the creation of Grid Identifiers
 * 
 * @author Priyatam
 */
public class GridIdentifierInterceptor extends EmptyInterceptor {

    private GridIdentifierCreator gridIdentifierCreator;

    @Override
    /*
     * Intercepting behaviour before Saving this entity
     * 
     * @see org.hibernate.EmptyInterceptor#onSave(java.lang.Object, java.io.Serializable,
     *      java.lang.Object[], java.lang.String[], org.hibernate.type.Type[])
     */
    public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) {
        boolean localMod = false;
        if (entity instanceof GridIdentifiable) {
            int gridIdIdx = findGridId(propertyNames);
            if (gridIdIdx < 0)
                throw new IllegalStateException("GridIdentifierInterceptor : "
                        + "Class doesn't have gridId property: " + entity.getClass().getName());
            if (state[gridIdIdx] == null) {
                state[gridIdIdx] = gridIdentifierCreator
                        .getGridIdentifier(entity.getClass().toString() + UUID.randomUUID().toString());
                localMod = true;
            }
        }

        return localMod;
    }

    private int findGridId(String[] propertyNames) {
        for (int i = 0; i < propertyNames.length; i++) {
            if ("gridId".equals(propertyNames[i]))
                return i;
        }
        return -1; // defer throwing exception so we can report class
    }

    public GridIdentifierCreator getGridIdentifierCreator() {
        return gridIdentifierCreator;
    }

    public void setGridIdentifierCreator(GridIdentifierCreator gridIdentifierCreator) {
        this.gridIdentifierCreator = gridIdentifierCreator;
    }
}