/*******************************************************************************
 * Copyright (c) 2007, 2011 Oracle. 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:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.jpa.core.internal.jpa1.context.java;

import java.util.Iterator;
import java.util.List;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.common.utility.Filter;
import org.eclipse.jpt.common.utility.internal.CollectionTools;
import org.eclipse.jpt.common.utility.internal.iterators.CompositeIterator;
import org.eclipse.jpt.common.utility.internal.iterators.EmptyIterator;
import org.eclipse.jpt.jpa.core.MappingKeys;
import org.eclipse.jpt.jpa.core.context.AssociationOverride;
import org.eclipse.jpt.jpa.core.context.AssociationOverrideContainer;
import org.eclipse.jpt.jpa.core.context.AttributeMapping;
import org.eclipse.jpt.jpa.core.context.BaseColumn;
import org.eclipse.jpt.jpa.core.context.JoinColumn;
import org.eclipse.jpt.jpa.core.context.JoinTable;
import org.eclipse.jpt.jpa.core.context.OverrideContainer;
import org.eclipse.jpt.jpa.core.context.Override_;
import org.eclipse.jpt.jpa.core.context.Relationship;
import org.eclipse.jpt.jpa.core.context.Table;
import org.eclipse.jpt.jpa.core.context.TypeMapping;
import org.eclipse.jpt.jpa.core.context.java.JavaAssociationOverrideContainer;
import org.eclipse.jpt.jpa.core.context.java.JavaPersistentAttribute;
import org.eclipse.jpt.jpa.core.internal.context.AttributeMappingTools;
import org.eclipse.jpt.jpa.core.internal.context.BaseColumnTextRangeResolver;
import org.eclipse.jpt.jpa.core.internal.context.JoinColumnTextRangeResolver;
import org.eclipse.jpt.jpa.core.internal.context.JptValidator;
import org.eclipse.jpt.jpa.core.internal.context.MappingTools;
import org.eclipse.jpt.jpa.core.internal.context.OverrideTextRangeResolver;
import org.eclipse.jpt.jpa.core.internal.context.TableTextRangeResolver;
import org.eclipse.jpt.jpa.core.internal.context.java.AbstractJavaBaseEmbeddedMapping;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.AssociationOverrideInverseJoinColumnValidator;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.AssociationOverrideJoinColumnValidator;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.AssociationOverrideJoinTableValidator;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.AssociationOverrideValidator;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.EmbeddableOverrideDescriptionProvider;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.EntityTableDescriptionProvider;
import org.eclipse.jpt.jpa.core.internal.jpa1.context.JoinTableTableDescriptionProvider;
import org.eclipse.jpt.jpa.core.jpa2.context.java.JavaEmbeddedMapping2_0;
import org.eclipse.jpt.jpa.core.resource.java.EmbeddedAnnotation;
import org.eclipse.jpt.jpa.core.resource.java.JavaResourcePersistentMember;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
import org.eclipse.wst.validation.internal.provisional.core.IReporter;

/**
 * Java embedded mapping
 */
public class GenericJavaEmbeddedMapping
	extends AbstractJavaBaseEmbeddedMapping<EmbeddedAnnotation>
	implements JavaEmbeddedMapping2_0
{
	protected final JavaAssociationOverrideContainer associationOverrideContainer;


	public GenericJavaEmbeddedMapping(JavaPersistentAttribute parent) {
		super(parent);
		this.associationOverrideContainer = this.buildAssociationOverrideContainer();
	}


	// ********** synchronize/update **********

	@Override
	public void synchronizeWithResourceModel() {
		super.synchronizeWithResourceModel();
		this.associationOverrideContainer.synchronizeWithResourceModel();
	}

	@Override
	public void update() {
		super.update();
		this.associationOverrideContainer.update();
	}


	// ********** association override container **********

	protected JavaAssociationOverrideContainer buildAssociationOverrideContainer() {
		return this.isJpa2_0Compatible() ?
				this.getJpaFactory2_0().buildJavaAssociationOverrideContainer(this, this.buildAssociationOverrideContainerOwner()) :
				new GenericJavaAssociationOverrideContainer(this, null);
	}

	public JavaAssociationOverrideContainer getAssociationOverrideContainer() {
		return this.associationOverrideContainer;
	}

	protected JavaAssociationOverrideContainer.Owner buildAssociationOverrideContainerOwner() {
		return new AssociationOverrideContainerOwner();
	}


	// ********** embedded mappings **********

	/**
	 * This is only to build the choices for a "mapped by" setting in a
	 * relationship mapping. JPA 2.0 does not support relationship mappings
	 * in an embedded ID class; so we only put this logic here.
	 */
	@Override
	@SuppressWarnings("unchecked")
	public Iterator<String> allMappingNames() {
		return this.isJpa2_0Compatible() ?
				new CompositeIterator<String>(super.allMappingNames(), this.allEmbeddableAttributeMappingNames()) :
				super.allMappingNames();
	}

	protected Iterator<String> allEmbeddableAttributeMappingNames() {
		return this.qualifiedEmbeddableOverridableMappingNames(AttributeMappingTools.ALL_MAPPING_NAMES_TRANSFORMER);
	}

	@Override
	public AttributeMapping resolveAttributeMapping(String attributeName) {
		AttributeMapping resolvedMapping = super.resolveAttributeMapping(attributeName);
		if (resolvedMapping != null) {
			return resolvedMapping;
		}
		return this.isJpa2_0Compatible() ? this.resolveAttributeMapping_(attributeName) : null;
	}

	protected AttributeMapping resolveAttributeMapping_(String attributeName) {
		attributeName = this.unqualify(attributeName);
		if (attributeName == null) {
			return null;
		}
		// recurse into the embeddable mappings
		for (AttributeMapping mapping : CollectionTools.iterable(this.embeddableAttributeMappings())) {
			AttributeMapping resolvedMapping = mapping.resolveAttributeMapping(attributeName);
			if (resolvedMapping != null) {
				return resolvedMapping;
			}
		}
		return null;
	}


	// ********** misc **********

	public String getKey() {
		return MappingKeys.EMBEDDED_ATTRIBUTE_MAPPING_KEY;
	}

	@Override
	protected String getAnnotationName() {
		return EmbeddedAnnotation.ANNOTATION_NAME;
	}

	@Override
	public Relationship resolveOverriddenRelationship(String attributeName) {
		return this.isJpa2_0Compatible() ? this.resolveOverriddenRelationship_(attributeName) : null;
	}

	protected Relationship resolveOverriddenRelationship_(String attributeName) {
		attributeName = this.unqualify(attributeName);
		if (attributeName == null) {
			return null;
		}
		AssociationOverride override = this.associationOverrideContainer.getSpecifiedOverrideNamed(attributeName);
		// recurse into the target embeddable if necessary
		return (override != null) ? override.getRelationship() : this.resolveOverriddenRelationshipInTargetEmbeddable(attributeName);
	}

	protected Relationship resolveOverriddenRelationshipInTargetEmbeddable(String attributeName) {
		return (this.targetEmbeddable == null) ? null : this.targetEmbeddable.resolveOverriddenRelationship(attributeName);
	}


	// ********** Java completion proposals **********

	@Override
	public Iterator<String> javaCompletionProposals(int pos, Filter<String> filter, CompilationUnit astRoot) {
		Iterator<String> result = super.javaCompletionProposals(pos, filter, astRoot);
		if (result != null) {
			return result;
		}

		result = this.associationOverrideContainer.javaCompletionProposals(pos, filter, astRoot);
		if (result != null) {
			return result;
		}

		return null;
	}


	// ********** validation **********

	@Override
	protected void validateOverrides(List<IMessage> messages, IReporter reporter, CompilationUnit astRoot) {
		super.validateOverrides(messages, reporter, astRoot);
		this.associationOverrideContainer.validate(messages, reporter, astRoot);
	}


	// ********** association override container owner **********

	protected class AssociationOverrideContainerOwner
		implements JavaAssociationOverrideContainer.Owner
	{
		public JavaResourcePersistentMember getResourcePersistentMember() {
			return GenericJavaEmbeddedMapping.this.getResourcePersistentAttribute();
		}

		public TypeMapping getTypeMapping() {
			return GenericJavaEmbeddedMapping.this.getTypeMapping();
		}

		public TypeMapping getOverridableTypeMapping() {
			return GenericJavaEmbeddedMapping.this.getTargetEmbeddable();
		}

		public Iterator<String> allOverridableNames() {
			TypeMapping typeMapping = this.getOverridableTypeMapping();
			return (typeMapping != null) ? typeMapping.allOverridableAssociationNames() : EmptyIterator.<String>instance();
		}

		public Relationship resolveOverriddenRelationship(String attributeName) {
			return MappingTools.resolveOverriddenRelationship(this.getOverridableTypeMapping(), attributeName);
		}

		public boolean tableNameIsInvalid(String tableName) {
			return this.getTypeMapping().tableNameIsInvalid(tableName);
		}

		public Iterator<String> candidateTableNames() {
			return this.getTypeMapping().allAssociatedTableNames();
		}

		public org.eclipse.jpt.jpa.db.Table resolveDbTable(String tableName) {
			return this.getTypeMapping().resolveDbTable(tableName);
		}

		public String getDefaultTableName() {
			return this.getTypeMapping().getPrimaryTableName();
		}

		public String getPossiblePrefix() {
			return null;
		}

		public String getWritePrefix() {
			return null;
		}

		// no maps, so all overrides are relevant
		public boolean isRelevant(String overrideName) {
			return true;
		}

		public TextRange getValidationTextRange(CompilationUnit astRoot) {
			return GenericJavaEmbeddedMapping.this.getValidationTextRange(astRoot);
		}

		public JptValidator buildValidator(Override_ override, OverrideContainer container, OverrideTextRangeResolver textRangeResolver) {
			return new AssociationOverrideValidator((AssociationOverride) override, (AssociationOverrideContainer) container, textRangeResolver, new EmbeddableOverrideDescriptionProvider());
		}

		public JptValidator buildColumnValidator(Override_ override, BaseColumn column, BaseColumn.Owner owner, BaseColumnTextRangeResolver textRangeResolver) {
			return new AssociationOverrideJoinColumnValidator((AssociationOverride) override, (JoinColumn) column, (JoinColumn.Owner) owner, (JoinColumnTextRangeResolver) textRangeResolver, new EntityTableDescriptionProvider());
		}

		public JptValidator buildJoinTableJoinColumnValidator(AssociationOverride override, JoinColumn column, JoinColumn.Owner owner, JoinColumnTextRangeResolver textRangeResolver) {
			return new AssociationOverrideJoinColumnValidator(override, column, owner, textRangeResolver, new JoinTableTableDescriptionProvider());
		}

		public JptValidator buildJoinTableInverseJoinColumnValidator(AssociationOverride override, JoinColumn column, JoinColumn.Owner owner, JoinColumnTextRangeResolver textRangeResolver) {
			return new AssociationOverrideInverseJoinColumnValidator(override, column, owner, textRangeResolver, new JoinTableTableDescriptionProvider());
		}

		public JptValidator buildTableValidator(AssociationOverride override, Table table, TableTextRangeResolver textRangeResolver) {
			return new AssociationOverrideJoinTableValidator(override, (JoinTable) table, textRangeResolver);
		}
	}
}