OracleXMLValueHandler.java

/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jkiss.dbeaver.ext.oracle.data;

import org.jkiss.code.NotNull;
import org.jkiss.dbeaver.ext.oracle.model.OracleConstants;
import org.jkiss.dbeaver.model.data.DBDContent;
import org.jkiss.dbeaver.model.exec.DBCException;
import org.jkiss.dbeaver.model.exec.DBCSession;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCResultSet;
import org.jkiss.dbeaver.model.impl.jdbc.data.handlers.JDBCContentValueHandler;
import org.jkiss.dbeaver.model.struct.DBSTypedObject;
import org.jkiss.dbeaver.utils.MimeTypes;

import java.sql.SQLException;
import java.sql.SQLXML;

/**
 * XML type support
 */
public class OracleXMLValueHandler extends OracleCLOBValueHandler {

    public static final OracleXMLValueHandler INSTANCE = new OracleXMLValueHandler();

    @NotNull
    @Override
    public String getValueContentType(@NotNull DBSTypedObject attribute) {
        return MimeTypes.TEXT_XML;
    }

    @Override
    protected DBDContent fetchColumnValue(DBCSession session, JDBCResultSet resultSet, DBSTypedObject type, int index) throws DBCException, SQLException
    {
        Object object;

        //OracleResultSet oracleResultSet = (OracleResultSet) resultSet.getOriginal();
        try {
            object = resultSet.getObject(index);
        } catch (SQLException e) {
            try {
                object = resultSet.getSQLXML(index);
            } catch (SQLException e1) {
/*
                try {
                    ResultSet originalRS = resultSet.getOriginal();
                    Class<?> rsClass = originalRS.getClass().getClassLoader().loadClass("oracle.jdbc.OracleResultSet");
                    Method method = rsClass.getMethod("getOPAQUE", Integer.TYPE);
                    object = method.invoke(originalRS, index);
                    if (object != null) {
                        Class<?> xmlType = object.getClass().getClassLoader().loadClass("oracle.xdb.XMLType");
                        Method xmlConstructor = xmlType.getMethod("createXML", object.getClass());
                        object = xmlConstructor.invoke(null, object);
                    }
                }
                catch (Throwable e2) {
                    object = null;
                }
*/
                object = null;
            }
        }

        if (object == null) {
            return new OracleContentXML(session.getDataSource(), null);
        } else if (object.getClass().getName().equals(OracleConstants.XMLTYPE_CLASS_NAME)) {
            return new OracleContentXML(session.getDataSource(), new OracleXMLWrapper(object));
        } else if (object instanceof SQLXML) {
            return new OracleContentXML(session.getDataSource(), (SQLXML) object);
        } else {
            throw new DBCException("Unsupported object type: " + object.getClass().getName());
        }
    }

    @Override
    public DBDContent getValueFromObject(@NotNull DBCSession session, @NotNull DBSTypedObject type, Object object, boolean copy) throws DBCException
    {
        if (object == null) {
            return new OracleContentXML(session.getDataSource(), null);
        } else if (object instanceof OracleContentXML) {
            return copy ? (OracleContentXML)((OracleContentXML) object).cloneValue(session.getProgressMonitor()) : (OracleContentXML) object;
        }
        return super.getValueFromObject(session, type, object, copy);
    }

}