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/*
* ModeShape (http://www.modeshape.org)
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
* See the AUTHORS.txt file in the distribution for a full listing of
* individual contributors.
*
* ModeShape is free software. Unless otherwise indicated, all code in ModeShape
* is licensed to you under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* ModeShape 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.modeshape.jdbc;
/**
* Specialized implementation for ModeShape-specific features.
*/
public class ModeShapeMetaData extends JcrMetaData {
public ModeShapeMetaData( JcrConnection connection) {
super(connection);
}
/**
* {@inheritDoc}
*
* ModeShape does support FULL OUTER JOIN, so this method returns true when this driver connects to a ModeShape
* JCR repository.
*
*
* @see java.sql.DatabaseMetaData#supportsFullOuterJoins()
*/
@Override
public boolean supportsFullOuterJoins() {
return true;
}
/**
* {@inheritDoc}
*
* ModeShape does support UNION, so this method returns true when this driver connects to a ModeShape JCR
* repository.
*
*
* @see java.sql.DatabaseMetaData#supportsUnion()
*/
@Override
public boolean supportsUnion() {
return true;
}
/**
* {@inheritDoc}
*
* ModeShape does support UNION ALL, so this method returns true when this driver connects to a ModeShape JCR
* repository.
*
*
* @see java.sql.DatabaseMetaData#supportsUnionAll()
*/
@Override
public boolean supportsUnionAll() {
return true;
}
/**
* {@inheritDoc}
*
* ModeShape uses arithmetic operations in criteria, and in the current implementation if one operand is null then the
* operations returns the other. Therefore, 'null + X = X', so this method returns false.
*
*
* @see java.sql.DatabaseMetaData#nullPlusNonNullIsNull()
*/
@Override
public boolean nullPlusNonNullIsNull() {
return false;
}
/**
* {@inheritDoc}
*
* ModeShape definitely uses sort order. Therefore, this method always returns false.
*
*
* @see java.sql.DatabaseMetaData#nullsAreSortedAtEnd()
*/
@Override
public boolean nullsAreSortedAtEnd() {
return false;
}
/**
* {@inheritDoc}
*
* ModeShape definitely uses sort order. Therefore, this method always returns false.
*
*
* @see java.sql.DatabaseMetaData#nullsAreSortedAtStart()
*/
@Override
public boolean nullsAreSortedAtStart() {
return false;
}
/**
* {@inheritDoc}
*
* ModeShape sorts null values to be lower than non-null values. Therefore, this method returns false.
*
*
* @see java.sql.DatabaseMetaData#nullsAreSortedHigh()
*/
@Override
public boolean nullsAreSortedHigh() {
return false;
}
/**
* {@inheritDoc}
*
* ModeShape sorts null values to be lower than non-null values. Therefore, this method returns true.
*
*
* @see java.sql.DatabaseMetaData#nullsAreSortedLow()
*/
@Override
public boolean nullsAreSortedLow() {
return true;
}
}