openjpa-slice/src/main/java/org/apache/openjpa/slice/jdbc/DistributedResultSet.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.openjpa.slice.jdbc;

import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.net.URL;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Date;
import java.sql.Ref;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.Map;

/**
 * A chain of ResultSet.
 * 
 * @author Pinaki Poddar 
 *
 */
class DistributedResultSet implements ResultSet {
	LinkedList<ResultSet> comps = new LinkedList<ResultSet>();
	ResultSet current;
	int cursor = -1;
	
	/**
	 * Adds the ResultSet only if it has rows.
	 */
	public void add(ResultSet rs) {
		try {
			if (rs.first())
				comps.add(rs);
		} catch (SQLException e) {
			// ignore
		}
	}
	
	public boolean absolute(int arg0) throws SQLException {
		throw new UnsupportedOperationException();
	}

	public void afterLast() throws SQLException {
		current = null;
		cursor  = comps.size();
	}

	public void beforeFirst() throws SQLException {
		current = null;
		cursor  = -1;
	}

	public void cancelRowUpdates() throws SQLException {
		throw new UnsupportedOperationException();
	}

	public void clearWarnings() throws SQLException {
		for (ResultSet rs:comps)
			rs.clearWarnings();
	}

	public void close() throws SQLException {
		for (ResultSet rs:comps)
			rs.close();
	}

	public void deleteRow() throws SQLException {
		current.deleteRow();
	}

	public int findColumn(String arg0) throws SQLException {
		return 0;
	}

	public boolean first() throws SQLException {
		if (comps.isEmpty()) return false;
		cursor = 0;
		current = comps.get(0);
		return true;
	}

	public Array getArray(int arg0) throws SQLException {
		return current.getArray(arg0);
	}

	public Array getArray(String arg0) throws SQLException {
		return current.getArray(arg0);
	}

	public InputStream getAsciiStream(int arg0) throws SQLException {
		return current.getAsciiStream(arg0);
	}

	public InputStream getAsciiStream(String arg0) throws SQLException {
		return current.getAsciiStream(arg0);
	}

	public BigDecimal getBigDecimal(int arg0) throws SQLException {
		return current.getBigDecimal(arg0);
	}

	public BigDecimal getBigDecimal(String arg0) throws SQLException {
		return current.getBigDecimal(arg0);
	}

	public BigDecimal getBigDecimal(int arg0, int arg1) throws SQLException {
		return current.getBigDecimal(arg0, arg1);
	}

	public BigDecimal getBigDecimal(String arg0, int arg1) throws SQLException {
		return current.getBigDecimal(arg0, arg1);
	}

	public InputStream getBinaryStream(int arg0) throws SQLException {
		return current.getBinaryStream(arg0);
	}

	public InputStream getBinaryStream(String arg0) throws SQLException {
		return current.getBinaryStream(arg0);
	}

	public Blob getBlob(int arg0) throws SQLException {
		return current.getBlob(arg0);
	}

	public Blob getBlob(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public boolean getBoolean(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public boolean getBoolean(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public byte getByte(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public byte getByte(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public byte[] getBytes(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public byte[] getBytes(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Reader getCharacterStream(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Reader getCharacterStream(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Clob getClob(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Clob getClob(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public int getConcurrency() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public String getCursorName() throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Date getDate(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Date getDate(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Date getDate(int arg0, Calendar arg1) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Date getDate(String arg0, Calendar arg1) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public double getDouble(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public double getDouble(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public int getFetchDirection() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public int getFetchSize() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public float getFloat(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public float getFloat(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public int getInt(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public int getInt(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public long getLong(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public long getLong(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public ResultSetMetaData getMetaData() throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Object getObject(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Object getObject(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Object getObject(int arg0, Map<String, Class<?>> arg1)
			throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Object getObject(String arg0, Map<String, Class<?>> arg1)
			throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Ref getRef(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Ref getRef(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public int getRow() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public short getShort(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public short getShort(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public Statement getStatement() throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public String getString(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public String getString(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Time getTime(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Time getTime(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Time getTime(int arg0, Calendar arg1) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Time getTime(String arg0, Calendar arg1) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Timestamp getTimestamp(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Timestamp getTimestamp(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Timestamp getTimestamp(int arg0, Calendar arg1) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public Timestamp getTimestamp(String arg0, Calendar arg1)
			throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public int getType() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	public URL getURL(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public URL getURL(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public InputStream getUnicodeStream(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public InputStream getUnicodeStream(String arg0) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public SQLWarning getWarnings() throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	public void insertRow() throws SQLException {
		// TODO Auto-generated method stub

	}

	public boolean isAfterLast() throws SQLException {
		return current == null && cursor >= comps.size();
	}

	public boolean isBeforeFirst() throws SQLException {
		return current == null && cursor<0;
	}

	public boolean isFirst() throws SQLException {
		return current != null && current.isFirst() && cursor==0;
	}

	public boolean isLast() throws SQLException {
		return current != null && current.isLast() && cursor==comps.size()-1;
	}

	public boolean last() throws SQLException {
		if (comps.isEmpty()) return false;
		cursor = comps.size()-1;
		return false;
	}

	public void moveToCurrentRow() throws SQLException {
		// TODO Auto-generated method stub

	}

	public void moveToInsertRow() throws SQLException {
		// TODO Auto-generated method stub

	}

	public boolean next() throws SQLException {
		if (current == null) {
			current = comps.get(0);
			cursor = 0;
		}
		if (current.next())
			return true;
		cursor++;
		if (cursor<comps.size())
			current = comps.get(cursor);
		return cursor<comps.size();
	}

	public boolean previous() throws SQLException {
		return current.previous();
	}

	public void refreshRow() throws SQLException {
		// TODO Auto-generated method stub

	}

	public boolean relative(int arg0) throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public boolean rowDeleted() throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public boolean rowInserted() throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public boolean rowUpdated() throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	public void setFetchDirection(int arg0) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void setFetchSize(int arg0) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateArray(int arg0, Array arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateArray(String arg0, Array arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateAsciiStream(int arg0, InputStream arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateAsciiStream(String arg0, InputStream arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBigDecimal(int arg0, BigDecimal arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBigDecimal(String arg0, BigDecimal arg1)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBinaryStream(int arg0, InputStream arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBinaryStream(String arg0, InputStream arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBlob(int arg0, Blob arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBlob(String arg0, Blob arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBoolean(int arg0, boolean arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBoolean(String arg0, boolean arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateByte(int arg0, byte arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateByte(String arg0, byte arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBytes(int arg0, byte[] arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateBytes(String arg0, byte[] arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateCharacterStream(int arg0, Reader arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateCharacterStream(String arg0, Reader arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateClob(int arg0, Clob arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateClob(String arg0, Clob arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateDate(int arg0, Date arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateDate(String arg0, Date arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateDouble(int arg0, double arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateDouble(String arg0, double arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateFloat(int arg0, float arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateFloat(String arg0, float arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateInt(int arg0, int arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateInt(String arg0, int arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateLong(int arg0, long arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateLong(String arg0, long arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateNull(int arg0) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateNull(String arg0) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateObject(int arg0, Object arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateObject(String arg0, Object arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateObject(int arg0, Object arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateObject(String arg0, Object arg1, int arg2)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateRef(int arg0, Ref arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateRef(String arg0, Ref arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateRow() throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateShort(int arg0, short arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateShort(String arg0, short arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateString(int arg0, String arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateString(String arg0, String arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateTime(int arg0, Time arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateTime(String arg0, Time arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateTimestamp(int arg0, Timestamp arg1) throws SQLException {
		// TODO Auto-generated method stub

	}

	public void updateTimestamp(String arg0, Timestamp arg1)
			throws SQLException {
		// TODO Auto-generated method stub

	}

	public boolean wasNull() throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

}