org.atemsource.atem.impl.common.IncomingManyRelation.java Source code

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Here is the source code for org.atemsource.atem.impl.common.IncomingManyRelation.java

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/*******************************************************************************
 * Stefan Meyer, 2012
 * 
 * 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.atemsource.atem.impl.common;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import org.atemsource.atem.api.attribute.AssociationAttribute;
import org.atemsource.atem.api.attribute.Attribute;
import org.atemsource.atem.api.attribute.relation.SetAssociationAttribute;
import org.atemsource.atem.api.service.AttributeQuery;
import org.atemsource.atem.api.type.EntityType;
import org.atemsource.atem.api.type.IncomingRelation;
import org.atemsource.atem.api.type.Type;
import org.atemsource.atem.impl.common.attribute.collection.AbstractCollectionAttributeImpl;
import org.atemsource.atem.impl.common.attribute.collection.SetAttributeImpl;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope("prototype")
public class IncomingManyRelation<J> extends AbstractCollectionAttributeImpl<J, Set>
        implements AssociationAttribute<J, Set>, SetAssociationAttribute<J>, IncomingRelation<J, Set> {

    @Override
    public EntityType<J> getTargetType() {
        return attribute.getEntityType();
    }

    private AttributeQuery attributeQuery;

    private Attribute attribute;

    public Attribute getAttribute() {
        return attribute;
    }

    public void setAttribute(Attribute attribute) {
        this.attribute = attribute;
    }

    @Override
    public void addElement(Object entity, J element) {
        throw new UnsupportedOperationException("not implemented");
    }

    @Override
    public void clear(Object entity) {
        throw new UnsupportedOperationException("not implemented");
    }

    public AttributeQuery getAttributeQuery() {
        return attributeQuery;
    }

    @Override
    public EntityType<J> getTargetType(J value) {
        return attribute.getEntityType();
    }

    @Override
    public Set<J> getValue(Object entity) {
        if (attributeQuery == null) {
            throw new UnsupportedOperationException("this incomingRelation is not readable");
        }
        HashSet<J> hashSet = new HashSet<J>();
        hashSet.addAll((Collection<? extends J>) attributeQuery.getResult(entity));
        return hashSet;
    }

    @Override
    public boolean isWriteable() {
        return false;
    }

    @Override
    public void removeElement(Object entity, J element) {
        throw new UnsupportedOperationException("not implemented");
    }

    public void setAttributeQuery(AttributeQuery attributeQuery) {
        this.attributeQuery = attributeQuery;
    }

    @Override
    public Class<Set> getAssociationType() {
        return Set.class;
    }

    @Override
    public Collection<J> getElements(Object entity) {
        Set<J> value = getValue(entity);
        return value;
    }

    @Override
    protected Set createEmptyCollection() {
        throw new UnsupportedOperationException("not implemented");
    }

    @Override
    public <T extends J> T createTarget(EntityType<T> targetType, Object parent) {
        // TODO implmenet this
        return null;
    }

}