Example usage for javax.persistence.metamodel SingularAttribute isId

Introduction

In this page you can find the example usage for javax.persistence.metamodel SingularAttribute isId.

Prototype

boolean isId();

Source Link

Document

Is the attribute an id attribute.

Usage

From source file:de.tudarmstadt.ukp.clarin.webanno.support.EntityModel.java

private void analyze(T aObject) {
    if (aObject != null) {
        entityClass = HibernateProxyHelper.getClassWithoutInitializingProxy(aObject);

        String idProperty = null;
        Metamodel metamodel = getEntityManager().getMetamodel();
        EntityType entity = metamodel.entity(entityClass);
        Set<SingularAttribute> singularAttributes = entity.getSingularAttributes();
        for (SingularAttribute singularAttribute : singularAttributes) {
            if (singularAttribute.isId()) {
                idProperty = singularAttribute.getName();
                break;
            }//from ww  w .j  a  v  a2 s.  c o  m
        }
        if (idProperty == null) {
            throw new RuntimeException("id field not found");
        }

        DirectFieldAccessor accessor = new DirectFieldAccessor(aObject);
        id = (Number) accessor.getPropertyValue(idProperty);
    } else {
        entityClass = null;
        id = null;
    }
}

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From source file:things.jpa.JpaConnector.java

private String getIdProperty(Class entityClass) {
    String idProperty = null;//from  ww w  .jav  a 2  s.  co  m
    Metamodel metamodel = entityManager.getMetamodel();
    EntityType entity = metamodel.entity(entityClass);
    Set<SingularAttribute> singularAttributes = entity.getSingularAttributes();
    for (SingularAttribute singularAttribute : singularAttributes) {
        if (singularAttribute.isId()) {
            idProperty = singularAttribute.getName();
            break;
        }
    }
    if (idProperty == null)
        throw new RuntimeException("id field not found");
    return idProperty;
}

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From source file:org.apache.openejb.util.proxy.QueryProxy.java

private void remove(final Object[] args, final Class<?> returnType) {
    if (args != null && args.length == 1 && returnType.equals(Void.TYPE)) {
        Object entity = args[0];// ww w  . j  av a 2 s  . c  o m
        if (!em.contains(entity)) { // reattach the entity if possible
            final Class<?> entityClass = entity.getClass();
            final EntityType<? extends Object> et = em.getMetamodel().entity(entityClass);

            if (!et.hasSingleIdAttribute()) {
                throw new IllegalArgumentException("Dynamic EJB doesn't manage IdClass yet");
            }

            SingularAttribute<?, ?> id = null; // = et.getId(entityClass); doesn't work with openJPA
            for (final SingularAttribute<?, ?> sa : et.getSingularAttributes()) {
                if (sa.isId()) {
                    id = sa;
                    break;
                }
            }
            if (id == null) {
                throw new IllegalArgumentException("id field not found");
            }
            final String idName = id.getName();

            final Object idValue;
            try {
                idValue = BeanUtils.getProperty(entity, idName);
            } catch (final InvocationTargetException e) {
                throw new IllegalArgumentException("can't invoke to get entity id");
            } catch (final NoSuchMethodException e) {
                throw new IllegalArgumentException("can't find the method to get entity id");
            } catch (final IllegalAccessException e) {
                throw new IllegalArgumentException("can't access field/method to get entity id");
            }

            entity = em.getReference(et.getJavaType(), idValue);
            if (entity == null) {
                throw new IllegalArgumentException("entity " + entity + " is not managed and can't be found.");
            }
        }
        em.remove(entity);
    } else {
        throw new IllegalArgumentException(REMOVE_NAME + " should have only one parameter and return void");
    }
}

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From source file:org.batoo.jpa.core.impl.model.EntityTypeImpl.java

/**
 * Returns if the method is an id method.
 * /*from ww  w . j  a  v a2 s.c  om*/
 * @param method
 *            the method
 * @return if the method is an id method
 * 
 * @since 2.0.0
 */
public boolean isIdMethod(Method method) {
    if (this.idMethods.containsKey(method)) { // if known id method, let go
        return true;
    }

    final String methodName = method.getName();
    if (methodName.startsWith("get") && (methodName.length() > 3)) { // check if id method
        for (final SingularAttribute<? super X, ?> attribute : this.getSingularAttributes()) {
            final String getterName = "get" + StringUtils.capitalize(attribute.getName());
            if (attribute.isId() && getterName.equals(method.getName())) {
                this.idMethods.put(method, method);
                return true;
            }
        }
    }

    return false;
}

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