//$Id: AbstractPropertyHolder.java 14736 2008-06-04 14:23:42Z hardy.ferentschik $
package org.hibernate.cfg;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.AssociationOverride;
import javax.persistence.AssociationOverrides;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.MappedSuperclass;
import org.hibernate.AssertionFailure;
import org.hibernate.annotations.common.reflection.XAnnotatedElement;
import org.hibernate.annotations.common.reflection.XClass;
import org.hibernate.annotations.common.reflection.XProperty;
import org.hibernate.util.StringHelper;
/**
* @author Emmanuel Bernard
*/
public abstract class AbstractPropertyHolder implements PropertyHolder {
protected PropertyHolder parent;
private Map<String, Column[]> holderColumnOverride;
private Map<String, Column[]> currentPropertyColumnOverride;
private Map<String, JoinColumn[]> holderJoinColumnOverride;
private Map<String, JoinColumn[]> currentPropertyJoinColumnOverride;
private String path;
private ExtendedMappings mappings;
public AbstractPropertyHolder(
String path, PropertyHolder parent, XClass clazzToProcess, ExtendedMappings mappings
) {
this.path = path;
this.parent = parent;
this.mappings = mappings;
buildHierarchyColumnOverride( clazzToProcess );
}
public String getPath() {
return path;
}
/**
* property can be null
*/
protected void setCurrentProperty(XProperty property) {
if ( property == null ) {
this.currentPropertyColumnOverride = null;
this.currentPropertyJoinColumnOverride = null;
}
else {
this.currentPropertyColumnOverride = buildColumnOverride(
property,
getPath()
);
if ( this.currentPropertyColumnOverride.size() == 0 ) {
this.currentPropertyColumnOverride = null;
}
this.currentPropertyJoinColumnOverride = buildJoinColumnOverride(
property,
getPath()
);
if ( this.currentPropertyJoinColumnOverride.size() == 0 ) {
this.currentPropertyJoinColumnOverride = null;
}
}
}
/**
* Get column overriding, property first, then parent, then holder
*/
public Column[] getOverriddenColumn(String propertyName) {
Column[] override = null;
if ( parent != null ) {
override = parent.getOverriddenColumn( propertyName );
}
if ( override == null && currentPropertyColumnOverride != null ) {
override = currentPropertyColumnOverride.get( propertyName );
}
if ( override == null && holderColumnOverride != null ) {
override = holderColumnOverride.get( propertyName );
}
return override;
}
/**
* Get column overriding, property first, then parent, then holder
*/
public JoinColumn[] getOverriddenJoinColumn(String propertyName) {
JoinColumn[] override = null;
if ( parent != null ) {
override = parent.getOverriddenJoinColumn( propertyName );
}
if ( override == null && currentPropertyJoinColumnOverride != null ) {
override = currentPropertyJoinColumnOverride.get( propertyName );
}
if ( override == null && holderJoinColumnOverride != null ) {
override = holderJoinColumnOverride.get( propertyName );
}
return override;
}
private void buildHierarchyColumnOverride(XClass element) {
XClass current = element;
Map<String, Column[]> columnOverride = new HashMap<String, Column[]>();
Map<String, JoinColumn[]> joinColumnOverride = new HashMap<String, JoinColumn[]>();
while ( current != null && !mappings.getReflectionManager().toXClass( Object.class ).equals( current ) ) {
if ( current.isAnnotationPresent( Entity.class ) || current.isAnnotationPresent( MappedSuperclass.class )
|| current.isAnnotationPresent( Embeddable.class ) ) {
//FIXME is embeddable override?
Map<String, Column[]> currentOverride = buildColumnOverride( current, getPath() );
Map<String, JoinColumn[]> currentJoinOverride = buildJoinColumnOverride( current, getPath() );
currentOverride.putAll( columnOverride ); //subclasses have precedence over superclasses
currentJoinOverride.putAll( joinColumnOverride ); //subclasses have precedence over superclasses
columnOverride = currentOverride;
joinColumnOverride = currentJoinOverride;
}
current = current.getSuperclass();
}
holderColumnOverride = columnOverride.size() > 0 ? columnOverride : null;
holderJoinColumnOverride = joinColumnOverride.size() > 0 ? joinColumnOverride : null;
}
private static Map<String, Column[]> buildColumnOverride(XAnnotatedElement element, String path) {
Map<String, Column[]> columnOverride = new HashMap<String, Column[]>();
if ( element == null ) return columnOverride;
AttributeOverride singleOverride = element.getAnnotation( AttributeOverride.class );
AttributeOverrides multipleOverrides = element.getAnnotation( AttributeOverrides.class );
AttributeOverride[] overrides;
if ( singleOverride != null ) {
overrides = new AttributeOverride[] { singleOverride };
}
else if ( multipleOverrides != null ) {
overrides = multipleOverrides.value();
}
else {
overrides = null;
}
//fill overriden columns
if ( overrides != null ) {
for (AttributeOverride depAttr : overrides) {
columnOverride.put(
StringHelper.qualify( path, depAttr.name() ),
new Column[] { depAttr.column() }
);
}
}
return columnOverride;
}
private static Map<String, JoinColumn[]> buildJoinColumnOverride(XAnnotatedElement element, String path) {
Map<String, JoinColumn[]> columnOverride = new HashMap<String, JoinColumn[]>();
if ( element == null ) return columnOverride;
AssociationOverride singleOverride = element.getAnnotation( AssociationOverride.class );
AssociationOverrides multipleOverrides = element.getAnnotation( AssociationOverrides.class );
AssociationOverride[] overrides;
if ( singleOverride != null ) {
overrides = new AssociationOverride[] { singleOverride };
}
else if ( multipleOverrides != null ) {
overrides = multipleOverrides.value();
}
else {
overrides = null;
}
//fill overriden columns
if ( overrides != null ) {
for (AssociationOverride depAttr : overrides) {
columnOverride.put(
StringHelper.qualify( path, depAttr.name() ),
depAttr.joinColumns()
);
}
}
return columnOverride;
}
public void setParentProperty(String parentProperty) {
throw new AssertionFailure( "Setting the parent property to a non component" );
}
}