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EntityUtils.java
Upload User: jiancairen
Upload Date: 2007-08-27
Package Size: 26458k
Code Size: 1k
Category:
Java Develop
Development Platform:
Java
- package org.springframework.samples.petclinic.util;
- import java.util.Collection;
- import java.util.Iterator;
- import org.springframework.orm.ObjectRetrievalFailureException;
- import org.springframework.samples.petclinic.Entity;
- /**
- * Utility methods for handling entities.
- * Separate from the Entity class mainly because of dependency
- * on the ORM-associated ObjectRetrievalFailureException.
- *
- * @author Juergen Hoeller
- * @since 29.10.2003
- * @see org.springframework.samples.petclinic.Entity
- */
- public abstract class EntityUtils {
- /**
- * Look up the entity of the given class with the given id
- * in the given collection.
- * @param entities the collection to search
- * @param entityClass the entity class to look up
- * @param entityId the entity id to look up
- * @return the found entity
- * @throws ObjectRetrievalFailureException if the entity was not found
- */
- public static Entity getById(Collection entities, Class entityClass, int entityId)
- throws ObjectRetrievalFailureException {
- for (Iterator it = entities.iterator(); it.hasNext();) {
- Entity entity = (Entity) it.next();
- if (entity.getId() == entityId && entityClass.isInstance(entity)) {
- return entity;
- }
- }
- throw new ObjectRetrievalFailureException(entityClass, new Integer(entityId));
- }
- }