RelationshipIdentityMapper.java example

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/*
 * JBoss, Home of Professional Open Source
 *
 * Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.picketlink.idm.jpa.internal.mappers;

import org.picketlink.common.properties.query.AnnotatedPropertyCriteria;
import org.picketlink.common.properties.query.PropertyQueries;
import org.picketlink.idm.IdentityManagementException;
import org.picketlink.idm.jpa.annotations.RelationshipDescriptor;
import org.picketlink.idm.jpa.annotations.RelationshipMember;
import org.picketlink.idm.jpa.annotations.entity.IdentityManaged;
import org.picketlink.idm.model.AttributedType;
import org.picketlink.idm.model.Relationship;

import java.util.ArrayList;
import java.util.List;

/**
 * @author pedroigor
 */
public class RelationshipIdentityMapper extends AbstractModelMapper {

    @Override
    public boolean supports(Class<?> entityType) {
        return PropertyQueries.<String>createQuery(entityType)
                .addCriteria(new AnnotatedPropertyCriteria(RelationshipDescriptor.class))
                .getFirstResult() != null
               && PropertyQueries.<String>createQuery(entityType)
                .addCriteria(new AnnotatedPropertyCriteria(RelationshipMember.class))
                .getFirstResult() != null;
    }

    @Override
    protected List<EntityMapping> doCreateMapping(final Class<?> entityType) {
        List<EntityMapping> mappings = new ArrayList<EntityMapping>();

        Class<?> mappedClass = Relationship.class;
        IdentityManaged identityManaged = entityType.getAnnotation(IdentityManaged.class);

        if (identityManaged != null) {
            Class<? extends AttributedType>[] value = identityManaged.value();

            if (value.length > 1) {
                throw new IdentityManagementException("Relationship identity mappings must map to a single @IdentityManaged type.");
            }

            mappedClass = value[0];
        }

        EntityMapping entityMapping = new EntityMapping(mappedClass);


        entityMapping.addMappedProperty(getAnnotatedProperty(RelationshipDescriptor.class, entityType));
        entityMapping.addMappedProperty(getAnnotatedProperty(RelationshipMember.class, entityType));
        entityMapping.addOwnerProperty(entityType);

        mappings.add(entityMapping);

        return mappings;
    }
}