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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.dialect;

import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.hibernate.LockOptions;
import org.hibernate.sql.ANSIJoinFragment;
import org.hibernate.sql.JoinFragment;

/**
 * A dialect specifically for use with Oracle 10g.
 * 
 * The main difference between this dialect and {@link Oracle9iDialect}
 * is the use of "ANSI join syntax".
 *
 * @author Steve Ebersole
 */
public class Oracle10gDialect extends Oracle9iDialect {
	/**
	 * Constructs an Oracle10gDialect
	 */
	public Oracle10gDialect() {
		super();
	}

	@Override
	public JoinFragment createOuterJoinFragment() {
		return new ANSIJoinFragment();
	}

	@Override
	public String getCrossJoinSeparator() {
		return " cross join ";
	}

	@Override
	public String getWriteLockString(int timeout) {
		if ( timeout == LockOptions.SKIP_LOCKED ) {
			return  getForUpdateSkipLockedString();
		}
		else {
			return super.getWriteLockString( timeout );
		}
	}

	@Override
	public String getWriteLockString(String aliases, int timeout) {
		if ( timeout == LockOptions.SKIP_LOCKED ) {
			return getForUpdateSkipLockedString( aliases );
		}
		else {
			return super.getWriteLockString( aliases, timeout );
		}
	}

	@Override
	public String getForUpdateSkipLockedString() {
		return " for update skip locked";
	}

	@Override
	public String getForUpdateSkipLockedString(String aliases) {
		return getForUpdateString() + " of " + aliases + " skip locked";
	}

	@Override
	public ResultSet getResultSet(CallableStatement statement, int position) throws SQLException {
		return (ResultSet) statement.getObject( position );
	}

	@Override
	public int registerResultSetOutParameter(CallableStatement statement, String name) throws SQLException {
		statement.registerOutParameter( name, OracleTypesHelper.INSTANCE.getOracleCursorTypeSqlType() );
		return 1;
	}

	@Override
	public ResultSet getResultSet(CallableStatement statement, String name) throws SQLException {
		return (ResultSet) statement.getObject( name );
	}

	@Override
	public boolean supportsSkipLocked() {
		return true;
	}
}