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org.hibernate.persister.entity.AbstractPropertyMapping Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.persister.entity;
import java.util.HashMap;
import java.util.Map;
import org.hibernate.MappingException;
import org.hibernate.QueryException;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.internal.CoreLogging;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.internal.util.collections.ArrayHelper;
import org.hibernate.sql.Template;
import org.hibernate.type.AssociationType;
import org.hibernate.type.CompositeType;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;
/**
* Basic implementation of the {@link PropertyMapping} contract.
*
* @author Gavin King
*/
public abstract class AbstractPropertyMapping implements PropertyMapping {
private static final CoreMessageLogger LOG = CoreLogging.messageLogger( AbstractPropertyMapping.class );
private final Map typesByPropertyPath = new HashMap();
private final Map columnsByPropertyPath = new HashMap();
private final Map columnReadersByPropertyPath = new HashMap();
private final Map columnReaderTemplatesByPropertyPath = new HashMap();
private final Map formulaTemplatesByPropertyPath = new HashMap();
public String[] getIdentifierColumnNames() {
throw new UnsupportedOperationException( "one-to-one is not supported here" );
}
public String[] getIdentifierColumnReaderTemplates() {
throw new UnsupportedOperationException( "one-to-one is not supported here" );
}
public String[] getIdentifierColumnReaders() {
throw new UnsupportedOperationException( "one-to-one is not supported here" );
}
protected abstract String getEntityName();
public Type toType(String propertyName) throws QueryException {
Type type = typesByPropertyPath.get( propertyName );
if ( type == null ) {
throw propertyException( propertyName );
}
return type;
}
protected final QueryException propertyException(String propertyName) throws QueryException {
return new QueryException( "could not resolve property: " + propertyName + " of: " + getEntityName() );
}
public String[] getColumnNames(String propertyName) {
String[] cols = columnsByPropertyPath.get( propertyName );
if ( cols == null ) {
throw new MappingException( "unknown property: " + propertyName );
}
return cols;
}
public String[] toColumns(String alias, String propertyName) throws QueryException {
//TODO: *two* hashmap lookups here is one too many...
String[] columns = columnsByPropertyPath.get( propertyName );
if ( columns == null ) {
throw propertyException( propertyName );
}
String[] formulaTemplates = formulaTemplatesByPropertyPath.get( propertyName );
String[] columnReaderTemplates = columnReaderTemplatesByPropertyPath.get( propertyName );
String[] result = new String[columns.length];
for ( int i = 0; i < columns.length; i++ ) {
if ( columnReaderTemplates[i] == null ) {
result[i] = StringHelper.replace( formulaTemplates[i], Template.TEMPLATE, alias );
}
else {
result[i] = StringHelper.replace( columnReaderTemplates[i], Template.TEMPLATE, alias );
}
}
return result;
}
public String[] toColumns(String propertyName) throws QueryException {
String[] columns = columnsByPropertyPath.get( propertyName );
if ( columns == null ) {
throw propertyException( propertyName );
}
String[] formulaTemplates = formulaTemplatesByPropertyPath.get( propertyName );
String[] columnReaders = columnReadersByPropertyPath.get( propertyName );
String[] result = new String[columns.length];
for ( int i = 0; i < columns.length; i++ ) {
if ( columnReaders[i] == null ) {
result[i] = StringHelper.replace( formulaTemplates[i], Template.TEMPLATE, "" );
}
else {
result[i] = columnReaders[i];
}
}
return result;
}
protected void addPropertyPath(
String path,
Type type,
String[] columns,
String[] columnReaders,
String[] columnReaderTemplates,
String[] formulaTemplates) {
// TODO : not quite sure yet of the difference, but this is only needed from annotations for @Id @ManyToOne support
if ( typesByPropertyPath.containsKey( path ) ) {
if ( LOG.isTraceEnabled() ) {
LOG.tracev(
"Skipping duplicate registration of path [{0}], existing type = [{1}], incoming type = [{2}]",
path,
typesByPropertyPath.get( path ),
type
);
}
return;
}
typesByPropertyPath.put( path, type );
columnsByPropertyPath.put( path, columns );
columnReadersByPropertyPath.put( path, columnReaders );
columnReaderTemplatesByPropertyPath.put( path, columnReaderTemplates );
if ( formulaTemplates != null ) {
formulaTemplatesByPropertyPath.put( path, formulaTemplates );
}
}
/*protected void initPropertyPaths(
final String path,
final Type type,
final String[] columns,
final String[] formulaTemplates,
final Mapping factory)
throws MappingException {
//addFormulaPropertyPath(path, type, formulaTemplates);
initPropertyPaths(path, type, columns, formulaTemplates, factory);
}*/
protected void initPropertyPaths(
final String path,
final Type type,
String[] columns,
String[] columnReaders,
String[] columnReaderTemplates,
final String[] formulaTemplates,
final Mapping factory) throws MappingException {
assert columns != null : "Incoming columns should not be null : " + path;
assert type != null : "Incoming type should not be null : " + path;
if ( columns.length != type.getColumnSpan( factory ) ) {
throw new MappingException(
"broken column mapping for: " + path +
" of: " + getEntityName()
);
}
if ( type.isAssociationType() ) {
AssociationType actype = (AssociationType) type;
if ( actype.useLHSPrimaryKey() ) {
columns = getIdentifierColumnNames();
columnReaders = getIdentifierColumnReaders();
columnReaderTemplates = getIdentifierColumnReaderTemplates();
}
else {
String foreignKeyProperty = actype.getLHSPropertyName();
if ( foreignKeyProperty != null && !path.equals( foreignKeyProperty ) ) {
//TODO: this requires that the collection is defined afterQuery the
// referenced property in the mapping file (ok?)
columns = columnsByPropertyPath.get( foreignKeyProperty );
if ( columns == null ) {
return; //get em on the second pass!
}
columnReaders = columnReadersByPropertyPath.get( foreignKeyProperty );
columnReaderTemplates = columnReaderTemplatesByPropertyPath.get( foreignKeyProperty );
}
}
}
if ( path != null ) {
addPropertyPath( path, type, columns, columnReaders, columnReaderTemplates, formulaTemplates );
}
if ( type.isComponentType() ) {
CompositeType actype = (CompositeType) type;
initComponentPropertyPaths(
path,
actype,
columns,
columnReaders,
columnReaderTemplates,
formulaTemplates,
factory
);
if ( actype.isEmbedded() ) {
initComponentPropertyPaths(
path == null ? null : StringHelper.qualifier( path ),
actype,
columns,
columnReaders,
columnReaderTemplates,
formulaTemplates,
factory
);
}
}
else if ( type.isEntityType() ) {
initIdentifierPropertyPaths(
path,
(EntityType) type,
columns,
columnReaders,
columnReaderTemplates,
factory
);
}
}
protected void initIdentifierPropertyPaths(
final String path,
final EntityType etype,
final String[] columns,
final String[] columnReaders,
final String[] columnReaderTemplates,
final Mapping factory) throws MappingException {
Type idtype = etype.getIdentifierOrUniqueKeyType( factory );
String idPropName = etype.getIdentifierOrUniqueKeyPropertyName( factory );
boolean hasNonIdentifierPropertyNamedId = hasNonIdentifierPropertyNamedId( etype, factory );
if ( etype.isReferenceToPrimaryKey() ) {
if ( !hasNonIdentifierPropertyNamedId ) {
String idpath1 = extendPath( path, EntityPersister.ENTITY_ID );
addPropertyPath( idpath1, idtype, columns, columnReaders, columnReaderTemplates, null );
initPropertyPaths( idpath1, idtype, columns, columnReaders, columnReaderTemplates, null, factory );
}
}
if ( idPropName != null ) {
String idpath2 = extendPath( path, idPropName );
addPropertyPath( idpath2, idtype, columns, columnReaders, columnReaderTemplates, null );
initPropertyPaths( idpath2, idtype, columns, columnReaders, columnReaderTemplates, null, factory );
}
}
private boolean hasNonIdentifierPropertyNamedId(final EntityType entityType, final Mapping factory) {
// TODO : would be great to have a Mapping#hasNonIdentifierPropertyNamedId method
// I don't believe that Mapping#getReferencedPropertyType accounts for the identifier property; so
// if it returns for a property named 'id', then we should have a non-id field named id
try {
return factory.getReferencedPropertyType(
entityType.getAssociatedEntityName(),
EntityPersister.ENTITY_ID
) != null;
}
catch (MappingException e) {
return false;
}
}
protected void initComponentPropertyPaths(
final String path,
final CompositeType type,
final String[] columns,
final String[] columnReaders,
final String[] columnReaderTemplates,
String[] formulaTemplates, final Mapping factory) throws MappingException {
Type[] types = type.getSubtypes();
String[] properties = type.getPropertyNames();
int begin = 0;
for ( int i = 0; i < properties.length; i++ ) {
String subpath = extendPath( path, properties[i] );
try {
int length = types[i].getColumnSpan( factory );
String[] columnSlice = ArrayHelper.slice( columns, begin, length );
String[] columnReaderSlice = ArrayHelper.slice( columnReaders, begin, length );
String[] columnReaderTemplateSlice = ArrayHelper.slice( columnReaderTemplates, begin, length );
String[] formulaSlice = formulaTemplates == null ?
null : ArrayHelper.slice( formulaTemplates, begin, length );
initPropertyPaths(
subpath,
types[i],
columnSlice,
columnReaderSlice,
columnReaderTemplateSlice,
formulaSlice,
factory
);
begin += length;
}
catch (Exception e) {
throw new MappingException( "bug in initComponentPropertyPaths", e );
}
}
}
private static String extendPath(String path, String property) {
return StringHelper.isEmpty( path ) ? property : StringHelper.qualify( path, property );
}
}
