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org.apache.openjpa.slice.jdbc.DistributedResultSet Maven / Gradle / Ivy
/*
* 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.NClob;
import java.sql.Ref;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
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.
* Assumes added ResultSet are identical in structure and fetches forward.
* Can not move absolutely or change fetch direction.
*
* @author Pinaki Poddar
*
*/
public class DistributedResultSet implements ResultSet {
private LinkedList comps = new LinkedList<>();
private ResultSet current;
private int cursor = -1;
/**
* Adds the ResultSet only if it has rows.
*/
public void add(ResultSet rs) {
try {
if (rs.first()) {
comps.add(rs);
rs.beforeFirst();
}
} catch (SQLException e) {
// ignore
}
}
@Override
public boolean absolute(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void afterLast() throws SQLException {
current = null;
cursor = comps.size();
}
@Override
public void beforeFirst() throws SQLException {
current = null;
cursor = -1;
}
@Override
public void cancelRowUpdates() throws SQLException {
current.cancelRowUpdates();
}
@Override
public void clearWarnings() throws SQLException {
for (ResultSet rs : comps)
rs.clearWarnings();
}
@Override
public void close() throws SQLException {
for (ResultSet rs : comps)
rs.close();
}
@Override
public void deleteRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public int findColumn(String arg0) throws SQLException {
return current.findColumn(arg0);
}
@Override
public boolean first() throws SQLException {
if (comps.isEmpty())
return false;
cursor = 0;
current = comps.getFirst();
return true;
}
@Override
public Array getArray(int arg0) throws SQLException {
return current.getArray(arg0);
}
@Override
public Array getArray(String arg0) throws SQLException {
return current.getArray(arg0);
}
@Override
public InputStream getAsciiStream(int arg0) throws SQLException {
return current.getAsciiStream(arg0);
}
@Override
public InputStream getAsciiStream(String arg0) throws SQLException {
return current.getAsciiStream(arg0);
}
@Override
public BigDecimal getBigDecimal(int arg0) throws SQLException {
return current.getBigDecimal(arg0);
}
@Override
public BigDecimal getBigDecimal(String arg0) throws SQLException {
return current.getBigDecimal(arg0);
}
@Override
public BigDecimal getBigDecimal(int arg0, int arg1) throws SQLException {
return current.getBigDecimal(arg0, arg1);
}
@Override
public BigDecimal getBigDecimal(String arg0, int arg1) throws SQLException {
return current.getBigDecimal(arg0, arg1);
}
@Override
public InputStream getBinaryStream(int arg0) throws SQLException {
return current.getBinaryStream(arg0);
}
@Override
public InputStream getBinaryStream(String arg0) throws SQLException {
return current.getBinaryStream(arg0);
}
@Override
public Blob getBlob(int arg0) throws SQLException {
return current.getBlob(arg0);
}
@Override
public Blob getBlob(String arg0) throws SQLException {
return current.getBlob(arg0);
}
@Override
public boolean getBoolean(int arg0) throws SQLException {
return current.getBoolean(arg0);
}
@Override
public boolean getBoolean(String arg0) throws SQLException {
return current.getBoolean(arg0);
}
@Override
public byte getByte(int arg0) throws SQLException {
return current.getByte(arg0);
}
@Override
public byte getByte(String arg0) throws SQLException {
return current.getByte(arg0);
}
@Override
public byte[] getBytes(int arg0) throws SQLException {
return current.getBytes(arg0);
}
@Override
public byte[] getBytes(String arg0) throws SQLException {
return current.getBytes(arg0);
}
@Override
public Reader getCharacterStream(int arg0) throws SQLException {
return current.getCharacterStream(arg0);
}
@Override
public Reader getCharacterStream(String arg0) throws SQLException {
return current.getCharacterStream(arg0);
}
@Override
public Clob getClob(int arg0) throws SQLException {
return current.getClob(arg0);
}
@Override
public Clob getClob(String arg0) throws SQLException {
return current.getClob(arg0);
}
@Override
public int getConcurrency() throws SQLException {
return current.getConcurrency();
}
@Override
public String getCursorName() throws SQLException {
return current.getCursorName();
}
@Override
public Date getDate(int arg0) throws SQLException {
return current.getDate(arg0);
}
@Override
public Date getDate(String arg0) throws SQLException {
return current.getDate(arg0);
}
@Override
public Date getDate(int arg0, Calendar arg1) throws SQLException {
return current.getDate(arg0, arg1);
}
@Override
public Date getDate(String arg0, Calendar arg1) throws SQLException {
return current.getDate(arg0, arg1);
}
@Override
public double getDouble(int arg0) throws SQLException {
return current.getDouble(arg0);
}
@Override
public double getDouble(String arg0) throws SQLException {
return current.getDouble(arg0);
}
@Override
public int getFetchDirection() throws SQLException {
return current.getFetchDirection();
}
@Override
public int getFetchSize() throws SQLException {
return current.getFetchSize();
}
@Override
public float getFloat(int arg0) throws SQLException {
return current.getFloat(arg0);
}
@Override
public float getFloat(String arg0) throws SQLException {
return current.getFloat(arg0);
}
@Override
public int getInt(int arg0) throws SQLException {
return current.getInt(arg0);
}
@Override
public int getInt(String arg0) throws SQLException {
return current.getInt(arg0);
}
@Override
public long getLong(int arg0) throws SQLException {
return current.getLong(arg0);
}
@Override
public long getLong(String arg0) throws SQLException {
return current.getLong(arg0);
}
@Override
public ResultSetMetaData getMetaData() throws SQLException {
return current.getMetaData();
}
@Override
public Object getObject(int arg0) throws SQLException {
return current.getObject(arg0);
}
@Override
public Object getObject(String arg0) throws SQLException {
return current.getObject(arg0);
}
@Override
public Object getObject(int arg0, Map> arg1)
throws SQLException {
return current.getObject(arg0, arg1);
}
@Override
public Object getObject(String arg0, Map> arg1)
throws SQLException {
return current.getObject(arg0, arg1);
}
@Override
public Ref getRef(int arg0) throws SQLException {
return current.getRef(arg0);
}
@Override
public Ref getRef(String arg0) throws SQLException {
return current.getRef(arg0);
}
@Override
public int getRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public short getShort(int arg0) throws SQLException {
return current.getShort(arg0);
}
@Override
public short getShort(String arg0) throws SQLException {
return current.getShort(arg0);
}
@Override
public Statement getStatement() throws SQLException {
return current.getStatement();
}
@Override
public String getString(int arg0) throws SQLException {
return current.getString(arg0);
}
@Override
public String getString(String arg0) throws SQLException {
return current.getString(arg0);
}
@Override
public Time getTime(int arg0) throws SQLException {
return current.getTime(arg0);
}
@Override
public Time getTime(String arg0) throws SQLException {
return current.getTime(arg0);
}
@Override
public Time getTime(int arg0, Calendar arg1) throws SQLException {
return current.getTime(arg0, arg1);
}
@Override
public Time getTime(String arg0, Calendar arg1) throws SQLException {
return current.getTime(arg0, arg1);
}
@Override
public Timestamp getTimestamp(int arg0) throws SQLException {
return current.getTimestamp(arg0);
}
@Override
public Timestamp getTimestamp(String arg0) throws SQLException {
return current.getTimestamp(arg0);
}
@Override
public Timestamp getTimestamp(int arg0, Calendar arg1) throws SQLException {
return current.getTimestamp(arg0, arg1);
}
@Override
public Timestamp getTimestamp(String arg0, Calendar arg1)
throws SQLException {
return current.getTimestamp(arg0, arg1);
}
@Override
public int getType() throws SQLException {
return current.getType();
}
@Override
public URL getURL(int arg0) throws SQLException {
return current.getURL(arg0);
}
@Override
public URL getURL(String arg0) throws SQLException {
return current.getURL(arg0);
}
@Override
public InputStream getUnicodeStream(int arg0) throws SQLException {
return current.getUnicodeStream(arg0);
}
@Override
public InputStream getUnicodeStream(String arg0) throws SQLException {
return current.getUnicodeStream(arg0);
}
@Override
public SQLWarning getWarnings() throws SQLException {
return current.getWarnings();
}
@Override
public void insertRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean isAfterLast() throws SQLException {
return current == null && cursor >= comps.size();
}
@Override
public boolean isBeforeFirst() throws SQLException {
return current == null && cursor < 0;
}
@Override
public boolean isFirst() throws SQLException {
return current != null && current.isFirst() && cursor == 0;
}
@Override
public boolean isLast() throws SQLException {
return current != null && current.isLast() && cursor == comps.size()-1;
}
@Override
public boolean last() throws SQLException {
if (comps.isEmpty())
return false;
cursor = comps.size()-1;
current = comps.getLast();
return current.last();
}
@Override
public void moveToCurrentRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void moveToInsertRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean next() throws SQLException {
if (comps.isEmpty())
return false;
if (current == null) {
current = comps.getFirst();
cursor = 0;
}
if (current.next())
return true;
cursor++;
if (cursor < comps.size()) {
current = comps.get(cursor);
return current.first();
}
return false;
}
@Override
public boolean previous() throws SQLException {
if (comps.isEmpty())
return false;
if (current.previous())
return true;
cursor--;
if (cursor >= 0) {
current = comps.get(cursor);
return current.last();
}
return false;
}
@Override
public void refreshRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean relative(int arg0) throws SQLException {
if (arg0 == 0)
return current != null;
boolean forward = arg0 > 0;
for (int i = 0; i < arg0; i++) {
if (forward) {
if (!next()) {
return false;
}
} else {
if (!previous()) {
return false;
}
}
}
return false;
}
@Override
public boolean rowDeleted() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean rowInserted() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean rowUpdated() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void setFetchDirection(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void setFetchSize(int arg0) throws SQLException {
for (ResultSet rs : comps)
rs.setFetchSize(arg0);
}
@Override
public void updateArray(int arg0, Array arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateArray(String arg0, Array arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(int arg0, InputStream arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(String arg0, InputStream arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBigDecimal(int arg0, BigDecimal arg1) throws SQLException
{
throw new UnsupportedOperationException();
}
@Override
public void updateBigDecimal(String arg0, BigDecimal arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(int arg0, InputStream arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(String arg0, InputStream arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(int arg0, Blob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(String arg0, Blob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBoolean(int arg0, boolean arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBoolean(String arg0, boolean arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateByte(int arg0, byte arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateByte(String arg0, byte arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBytes(int arg0, byte[] arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBytes(String arg0, byte[] arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(int arg0, Reader arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(String arg0, Reader arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(int arg0, Clob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(String arg0, Clob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateDate(int arg0, Date arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateDate(String arg0, Date arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateDouble(int arg0, double arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateDouble(String arg0, double arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateFloat(int arg0, float arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateFloat(String arg0, float arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateInt(int arg0, int arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateInt(String arg0, int arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateLong(int arg0, long arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateLong(String arg0, long arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNull(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNull(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateObject(int arg0, Object arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateObject(String arg0, Object arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateObject(int arg0, Object arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateObject(String arg0, Object arg1, int arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateRef(int arg0, Ref arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateRef(String arg0, Ref arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateRow() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateShort(int arg0, short arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateShort(String arg0, short arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateString(int arg0, String arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateString(String arg0, String arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateTime(int arg0, Time arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateTime(String arg0, Time arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateTimestamp(int arg0, Timestamp arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateTimestamp(String arg0, Timestamp arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean wasNull() throws SQLException {
return current.wasNull();
}
@Override
public boolean isWrapperFor(Class iface) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public T unwrap(Class iface) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public int getHoldability() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public Reader getNCharacterStream(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public Reader getNCharacterStream(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public NClob getNClob(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public NClob getNClob(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public String getNString(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public String getNString(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public RowId getRowId(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public RowId getRowId(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public SQLXML getSQLXML(int arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public SQLXML getSQLXML(String arg0) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public boolean isClosed() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(int arg0, InputStream arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(String arg0, InputStream arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(int arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateAsciiStream(String arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(int arg0, InputStream arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(String arg0, InputStream arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(int arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBinaryStream(String arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(int arg0, InputStream arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(String arg0, InputStream arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(int arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateBlob(String arg0, InputStream arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(int arg0, Reader arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(String arg0, Reader arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(int arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateCharacterStream(String arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(int arg0, Reader arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(String arg0, Reader arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(int arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateClob(String arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNCharacterStream(int arg0, Reader arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNCharacterStream(String arg0, Reader arg1)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNCharacterStream(int arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNCharacterStream(String arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(int arg0, NClob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(String arg0, NClob arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(int arg0, Reader arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(String arg0, Reader arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(int arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNClob(String arg0, Reader arg1, long arg2)
throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNString(int arg0, String arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateNString(String arg0, String arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateRowId(int arg0, RowId arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateRowId(String arg0, RowId arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateSQLXML(int arg0, SQLXML arg1) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void updateSQLXML(String arg0, SQLXML arg1) throws SQLException {
throw new UnsupportedOperationException();
}
// Java 7 methods follow
@Override
public T getObject(String columnLabel, Class type) throws SQLException{
throw new UnsupportedOperationException();
}
@Override
public T getObject(int columnIndex, Class type) throws SQLException{
throw new UnsupportedOperationException();
}
}
