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/*******************************************************************************
 * Copyright (c) 2013 Boeing.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Boeing - initial API and implementation
 *******************************************************************************/
package org.eclipse.osee.orcs.core.internal.types.impl;

import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Map;
import org.eclipse.osee.framework.core.data.IArtifactType;
import org.eclipse.osee.framework.core.data.IAttributeType;
import org.eclipse.osee.framework.core.data.IOseeBranch;
import org.eclipse.osee.framework.core.dsl.oseeDsl.XArtifactType;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.util.Conditions;
import org.eclipse.osee.orcs.data.ArtifactTypes;
import com.google.common.collect.Sets;

/**
 * @author Roberto E. Escobar
 */
public class ArtifactTypesImpl implements ArtifactTypes {

   public static interface ArtifactTypeIndexProvider {
      ArtifactTypeIndex getArtifactTypeIndex() throws OseeCoreException;
   }

   private final ArtifactTypeIndexProvider provider;

   public ArtifactTypesImpl(ArtifactTypeIndexProvider provider) {
      this.provider = provider;
   }

   private ArtifactTypeIndex getArtifactTypesIndex() throws OseeCoreException {
      return provider.getArtifactTypeIndex();
   }

   private XArtifactType getType(IArtifactType artType) throws OseeCoreException {
      Conditions.checkNotNull(artType, "artifactType");
      return getArtifactTypesIndex().getDslTypeByToken(artType);
   }

   @Override
   public Collection<? extends IArtifactType> getAll() throws OseeCoreException {
      return getArtifactTypesIndex().getAllTokens();
   }

   @Override
   public IArtifactType getByUuid(Long uuid) throws OseeCoreException {
      Conditions.checkNotNull(uuid, "uuid");
      return getArtifactTypesIndex().getTokenByUuid(uuid);
   }

   @Override
   public boolean isAbstract(IArtifactType artType) throws OseeCoreException {
      XArtifactType type = getType(artType);
      return type.isAbstract();
   }

   @Override
   public boolean hasSuperArtifactTypes(IArtifactType artType) throws OseeCoreException {
      return !getSuperArtifactTypes(artType).isEmpty();
   }

   @Override
   public Collection<? extends IArtifactType> getSuperArtifactTypes(IArtifactType artType) throws OseeCoreException {
      Conditions.checkNotNull(artType, "artifactType");
      return getArtifactTypesIndex().getSuperTypes(artType);
   }

   @Override
   public boolean inheritsFrom(IArtifactType thisType, IArtifactType... otherTypes) throws OseeCoreException {
      Conditions.checkNotNull(thisType, "thisArtifactType");
      Conditions.checkNotNull(otherTypes, "otherArtifactTypes");
      return getArtifactTypesIndex().inheritsFrom(thisType, otherTypes);
   }

   @Override
   public Collection<? extends IArtifactType> getAllDescendantTypes(IArtifactType artType) throws OseeCoreException {
      Conditions.checkNotNull(artType, "artifactType");
      LinkedHashSet<IArtifactType> descendants = Sets.newLinkedHashSet();
      walkDescendants(artType, descendants);
      return descendants;
   }

   private void walkDescendants(IArtifactType artifactType, Collection<IArtifactType> descendants) throws OseeCoreException {
      Collection<IArtifactType> childTypes = getArtifactTypesIndex().getDescendantTypes(artifactType);
      if (!childTypes.isEmpty()) {
         for (IArtifactType type : childTypes) {
            walkDescendants(type, descendants);
            descendants.add(type);
         }
      }
   }

   @Override
   public boolean isValidAttributeType(IArtifactType artType, IOseeBranch branch, IAttributeType attributeType) throws OseeCoreException {
      Collection<IAttributeType> attributes = getAttributeTypes(artType, branch);
      return attributes.contains(attributeType);
   }

   @Override
   public Collection<IAttributeType> getAttributeTypes(IArtifactType artType, IOseeBranch branch) throws OseeCoreException {
      Conditions.checkNotNull(artType, "artifactType");
      Conditions.checkNotNull(branch, "branch");
      return getArtifactTypesIndex().getAttributeTypes(artType, branch);
   }

   @Override
   public boolean isEmpty() throws OseeCoreException {
      return getArtifactTypesIndex().isEmpty();
   }

   @Override
   public int size() throws OseeCoreException {
      return getArtifactTypesIndex().size();
   }

   @Override
   public boolean exists(IArtifactType item) throws OseeCoreException {
      return getArtifactTypesIndex().existsByUuid(item.getGuid());
   }

   @Override
   public Map<IOseeBranch, Collection<IAttributeType>> getAllAttributeTypes(IArtifactType artType) throws OseeCoreException {
      return getArtifactTypesIndex().getAllAttributeTypes(artType);
   }

}

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