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/*
* 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.hql.internal.ast.tree;
import java.util.Locale;
import org.hibernate.QueryException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.hql.spi.QueryTranslator;
import org.hibernate.internal.util.ReflectHelper;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.type.LiteralType;
import org.hibernate.type.Type;
import org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter;
/**
* A node representing a static Java constant.
*
* @author Steve Ebersole
*/
public class JavaConstantNode extends Node implements ExpectedTypeAwareNode, SessionFactoryAwareNode {
private SessionFactoryImplementor factory;
private String constantExpression;
private Object constantValue;
private Type heuristicType;
private Type expectedType;
@Override
public void setText(String s) {
// for some reason the antlr.CommonAST initialization routines force
// this method to get called twice. The first time with an empty string
if ( StringHelper.isNotEmpty( s ) ) {
constantExpression = s;
constantValue = ReflectHelper.getConstantValue( s, factory );
heuristicType = factory.getTypeResolver().heuristicType( constantValue.getClass().getName() );
super.setText( s );
}
}
@Override
public void setExpectedType(Type expectedType) {
this.expectedType = expectedType;
}
@Override
public Type getExpectedType() {
return expectedType;
}
@Override
public void setSessionFactory(SessionFactoryImplementor factory) {
this.factory = factory;
}
@Override
@SuppressWarnings("unchecked")
public String getRenderText(SessionFactoryImplementor sessionFactory) {
final Type type = expectedType == null
? heuristicType
: Number.class.isAssignableFrom( heuristicType.getReturnedClass() )
? heuristicType
: expectedType;
try {
if ( LiteralType.class.isInstance( type ) ) {
final LiteralType literalType = (LiteralType) type;
final Dialect dialect = factory.getDialect();
return literalType.objectToSQLString( constantValue, dialect );
}
else if ( AttributeConverterTypeAdapter.class.isInstance( type ) ) {
final AttributeConverterTypeAdapter converterType = (AttributeConverterTypeAdapter) type;
if ( !converterType.getModelType().isInstance( constantValue ) ) {
throw new QueryException(
String.format(
Locale.ENGLISH,
"Recognized query constant expression [%s] was not resolved to type [%s] expected by defined AttributeConverter [%s]",
constantExpression,
constantValue.getClass().getName(),
converterType.getModelType().getName()
)
);
}
final Object value = converterType.getAttributeConverter().toRelationalValue( constantValue );
if ( String.class.equals( converterType.getJdbcType() ) ) {
return "'" + value + "'";
}
else {
return value.toString();
}
}
else {
throw new QueryException(
String.format(
Locale.ENGLISH,
"Unrecognized Hibernate Type for handling query constant (%s); expecting LiteralType implementation or AttributeConverter",
constantExpression
)
);
}
}
catch (QueryException e) {
throw e;
}
catch (Exception t) {
throw new QueryException( QueryTranslator.ERROR_CANNOT_FORMAT_LITERAL + constantExpression, t );
}
}
}