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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* 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
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package org.apache.olingo.odata2.jpa.processor.core.model;
import org.apache.olingo.odata2.api.edm.provider.ReferentialConstraint;
import org.apache.olingo.odata2.jpa.processor.api.access.JPAEdmBuilder;
import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPAModelException;
import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmAssociationView;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmEntityTypeView;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmPropertyView;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmReferentialConstraintRoleView;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmReferentialConstraintRoleView.RoleType;
import org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmReferentialConstraintView;
public class JPAEdmReferentialConstraint extends JPAEdmBaseViewImpl implements JPAEdmReferentialConstraintView {
private JPAEdmRefConstraintBuilder builder = null;
private boolean exists = false;
private boolean firstBuild = true;
private JPAEdmAssociationView associationView;
private JPAEdmPropertyView propertyView;
private JPAEdmEntityTypeView entityTypeView;
private ReferentialConstraint referentialConstraint;
private JPAEdmReferentialConstraintRoleView principalRoleView;
private JPAEdmReferentialConstraintRoleView dependentRoleView;
private String relationShipName;
public JPAEdmReferentialConstraint(final JPAEdmAssociationView associationView,
final JPAEdmEntityTypeView entityTypeView, final JPAEdmPropertyView propertyView) {
super(associationView);
this.associationView = associationView;
this.propertyView = propertyView;
this.entityTypeView = entityTypeView;
relationShipName = associationView.getEdmAssociation().getName();
}
@Override
public JPAEdmBuilder getBuilder() {
if (builder == null) {
builder = new JPAEdmRefConstraintBuilder();
}
return builder;
}
@Override
public ReferentialConstraint getEdmReferentialConstraint() {
return referentialConstraint;
}
@Override
public boolean isExists() {
return exists;
}
@Override
public String getEdmRelationShipName() {
return relationShipName;
}
private class JPAEdmRefConstraintBuilder implements JPAEdmBuilder {
/*
* Check if Ref Constraint was already Built. If Ref constraint was
* already built consistently then do not build referential constraint.
*
* For Ref Constraint to be consistently built Principal and Dependent
* roles must be consistently built. If Principal or Dependent roles are
* not consistently built then try building them again.
*
* The Principal and Dependent roles could be have been built
* inconsistently if the required EDM Entity Types or EDM properties are
* yet to be built. In such cases rebuilding these roles would make them
* consistent.
*/
@Override
public void build() throws ODataJPAModelException, ODataJPARuntimeException {
if (firstBuild) {
firstBuild();
} else {
if (exists && !firstBuild && principalRoleView.isConsistent() == false) {
principalRoleView.getBuilder().build();
}
if (exists && !firstBuild && dependentRoleView.isConsistent() == false) {
dependentRoleView.getBuilder().build();
}
}
if (principalRoleView.isConsistent()) {
referentialConstraint.setPrincipal(principalRoleView.getEdmReferentialConstraintRole());
}
if (dependentRoleView.isConsistent()) {
referentialConstraint.setDependent(dependentRoleView.getEdmReferentialConstraintRole());
}
exists = principalRoleView.isExists() & dependentRoleView.isExists();
isConsistent = principalRoleView.isConsistent() & dependentRoleView.isConsistent();
}
private void firstBuild() throws ODataJPAModelException, ODataJPARuntimeException {
firstBuild = false;
if (principalRoleView == null && dependentRoleView == null) {
principalRoleView =
new JPAEdmReferentialConstraintRole(RoleType.PRINCIPAL, entityTypeView, propertyView, associationView);
principalRoleView.getBuilder().build();
dependentRoleView =
new JPAEdmReferentialConstraintRole(RoleType.DEPENDENT, entityTypeView, propertyView, associationView);
dependentRoleView.getBuilder().build();
if (referentialConstraint == null) {
referentialConstraint = new ReferentialConstraint();
}
}
}
}
}