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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.sql.Types;
import java.util.Locale;
import org.hibernate.QueryException;
import org.hibernate.hql.internal.antlr.HqlSqlTokenTypes;
import org.hibernate.hql.internal.ast.util.ColumnHelper;
import org.hibernate.metamodel.model.convert.spi.JpaAttributeConverter;
import org.hibernate.type.SingleColumnType;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.Type;
import org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter;
import antlr.SemanticException;
/**
* Represents a literal.
*
* @author josh
* @author Steve Ebersole
*/
public class LiteralNode extends AbstractSelectExpression implements HqlSqlTokenTypes, ExpectedTypeAwareNode {
private Type expectedType;
public void setScalarColumnText(int i) throws SemanticException {
ColumnHelper.generateSingleScalarColumn( this, i );
}
public Type getDataType() {
if ( getExpectedType() != null ) {
return getExpectedType();
}
switch ( getType() ) {
case NUM_INT:
return StandardBasicTypes.INTEGER;
case NUM_FLOAT:
return StandardBasicTypes.FLOAT;
case NUM_LONG:
return StandardBasicTypes.LONG;
case NUM_DOUBLE:
return StandardBasicTypes.DOUBLE;
case NUM_BIG_INTEGER:
return StandardBasicTypes.BIG_INTEGER;
case NUM_BIG_DECIMAL:
return StandardBasicTypes.BIG_DECIMAL;
case QUOTED_STRING:
return StandardBasicTypes.STRING;
case TRUE:
case FALSE:
return StandardBasicTypes.BOOLEAN;
default:
return null;
}
}
public Object getLiteralValue() {
String text = getText();
if ( getType() == QUOTED_STRING ) {
text = text.substring( 1, text.length() -1 );
}
final Type inherentType = getDataType();
if ( inherentType == null ) {
return text;
}
return ( (SingleColumnType) inherentType ).fromStringValue( text );
}
@Override
public void setExpectedType(Type expectedType) {
if ( this.expectedType != null ) {
return;
}
if ( AttributeConverterTypeAdapter.class.isInstance( expectedType ) ) {
final AttributeConverterTypeAdapter adapterType = (AttributeConverterTypeAdapter) expectedType;
setText( determineConvertedValue( adapterType, getLiteralValue() ) );
this.expectedType = expectedType;
}
}
@SuppressWarnings("unchecked")
protected String determineConvertedValue(AttributeConverterTypeAdapter converterTypeAdapter, Object literalValue) {
if ( getDataType().getReturnedClass().equals( converterTypeAdapter.getModelType() ) ) {
// apply the converter
final JpaAttributeConverter converter = converterTypeAdapter.getAttributeConverter();
final Object converted = converter.toRelationalValue( getLiteralValue() );
if ( isCharacterData( converterTypeAdapter.sqlType() ) ) {
return "'" + converted.toString() + "'";
}
else {
return converted.toString();
}
}
else if ( getDataType().getReturnedClass().equals( converterTypeAdapter.getJdbcType() ) ) {
if ( isCharacterData( converterTypeAdapter.sqlType() ) ) {
return "'" + literalValue.toString() + "'";
}
else {
return literalValue.toString();
}
}
else {
throw new QueryException(
String.format(
Locale.ROOT,
"AttributeConverter domain-model attribute type [%s] and JDBC type [%s] did not match query literal type [%s]",
converterTypeAdapter.getModelType().getName(),
converterTypeAdapter.getJdbcType().getName(),
getDataType().getReturnedClass().getName()
)
);
}
}
private boolean isCharacterData(int typeCode) {
return Types.VARCHAR == typeCode
|| Types.CHAR == typeCode
|| Types.NVARCHAR == typeCode
|| Types.NCHAR == typeCode;
}
@Override
public Type getExpectedType() {
return expectedType;
}
}