/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.metamodel.binding;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.AssertionFailure;
import org.hibernate.metamodel.domain.SingularAttribute;
import org.hibernate.metamodel.relational.SimpleValue;
import org.hibernate.metamodel.relational.Tuple;
import org.hibernate.metamodel.relational.Value;
/**
* @author Steve Ebersole
*/
public abstract class AbstractSingularAttributeBinding
extends AbstractAttributeBinding
implements SingularAttributeBinding {
private Value value;
private List<SimpleValueBinding> simpleValueBindings = new ArrayList<SimpleValueBinding>();
private boolean hasDerivedValue;
private boolean isNullable = true;
protected AbstractSingularAttributeBinding(AttributeBindingContainer container, SingularAttribute attribute) {
super( container, attribute );
}
@Override
public SingularAttribute getAttribute() {
return (SingularAttribute) super.getAttribute();
}
public Value getValue() {
return value;
}
public void setSimpleValueBindings(Iterable<SimpleValueBinding> simpleValueBindings) {
List<SimpleValue> values = new ArrayList<SimpleValue>();
for ( SimpleValueBinding simpleValueBinding : simpleValueBindings ) {
this.simpleValueBindings.add( simpleValueBinding );
values.add( simpleValueBinding.getSimpleValue() );
this.hasDerivedValue = this.hasDerivedValue || simpleValueBinding.isDerived();
this.isNullable = this.isNullable && simpleValueBinding.isNullable();
}
if ( values.size() == 1 ) {
this.value = values.get( 0 );
}
else {
final Tuple tuple = values.get( 0 ).getTable().createTuple( getRole() );
for ( SimpleValue value : values ) {
tuple.addValue( value );
}
this.value = tuple;
}
}
private String getRole() {
return getContainer().getPathBase() + '.' + getAttribute().getName();
}
@Override
public int getSimpleValueSpan() {
checkValueBinding();
return simpleValueBindings.size();
}
protected void checkValueBinding() {
if ( value == null ) {
throw new AssertionFailure( "No values yet bound!" );
}
}
@Override
public Iterable<SimpleValueBinding> getSimpleValueBindings() {
return simpleValueBindings;
}
@Override
public boolean hasDerivedValue() {
checkValueBinding();
return hasDerivedValue;
}
@Override
public boolean isNullable() {
checkValueBinding();
return isNullable;
}
}