org.verdictdb.jdbc41.VerdictStreamResultSet Maven / Gradle / Ivy
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package org.verdictdb.jdbc41;
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.ResultSetMetaData;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
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.HashMap;
import java.util.Map;
import java.util.concurrent.BlockingDeque;
import java.util.concurrent.LinkedBlockingDeque;
import org.apache.commons.lang3.time.FastDateFormat;
import org.verdictdb.VerdictSingleResult;
/**
* Created by: Shucheng Zhong on 9/12/18
* ResultSet type for stream select query when VerdictStatement.sql() is called.
*
* It contains a blocking queue: queryResults. When user call next(), if no queryResult available,
* it will try to take one from queryResults. Blocked if no results are returned from VerdictResultStream.
* The first column is verdictStreamSequenceColumn, which should be int class that specify the block sequence number
*/
public class VerdictStreamResultSet extends VerdictResultSet {
private VerdictStatement.ExecuteStream runnable;
private static final String verdictStreamSequenceColumn = "seq";
boolean hasReadAllQueryResults = false;
private boolean isClosed = false;
private long rowIndex = 0;
private HashMap colNameIdx = new HashMap<>();
BlockingDeque queryResults = new LinkedBlockingDeque<>();
VerdictSingleResult queryResult;
private int lastQueryResultIndex = 0;
private VerdictStreamResultSetMetaData metadata;
public VerdictStreamResultSet() {
super();
}
public VerdictStreamResultSet(VerdictSingleResult queryResult) {
super(queryResult);
queryResults.add(queryResult);
}
public void appendSingleResult(VerdictSingleResult queryResult) {
queryResults.add(queryResult);
}
/**
* return true if getting all SingleResults
*/
void setCompleted() {
hasReadAllQueryResults = true;
}
void setRunnable(VerdictStatement.ExecuteStream r) {
this.runnable = r;
}
@Override
public boolean absolute(int row) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void afterLast() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void beforeFirst() throws SQLException {
rowIndex = 0;
lastQueryResultIndex = 0;
// throw new SQLFeatureNotSupportedException();
}
@Override
public void cancelRowUpdates() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
private void checkIndex(int index) throws SQLException {
if (index == 1) {
throw new SQLException("The first column of a streaming query result is the sequence number of each result set; thus, the values can be retrieved only in the types compatible with integer.");
} else if (index < 1) {
throw new SQLException("A column index must be a positive integer.");
}
}
@Override
public void clearWarnings() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void close() {
isClosed = true;
runnable.abort();
}
@Override
public void deleteRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public int findColumn(String columnLabel) throws SQLException {
if (columnLabel.equals(standardizedLabel(verdictStreamSequenceColumn))) {
return 1;
}
return colNameIdx.get(standardizedLabel(columnLabel.toLowerCase())) + 2;
}
@Override
public boolean first() throws SQLException {
if (queryResults.size() == 0) {
return false;
} else {
rowIndex = 1;
lastQueryResultIndex = 0;
return true;
}
// throw new SQLFeatureNotSupportedException();
}
@Override
public Array getArray(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getArray(columnIndex - 2);
}
@Override
public Array getArray(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getArray(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public InputStream getAsciiStream(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getAsciiStream(columnIndex - 2);
}
@Override
public InputStream getAsciiStream(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getAsciiStream(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return BigDecimal.valueOf(lastQueryResultIndex);
}
checkIndex(columnIndex);
return queryResult.getBigDecimal(columnIndex - 2);
}
@Override
public BigDecimal getBigDecimal(int columnIndex, int scale) throws SQLException {
if (columnIndex == 1) {
return BigDecimal.valueOf(lastQueryResultIndex, scale);
}
checkIndex(columnIndex);
return queryResult.getBigDecimal(columnIndex - 2, scale);
}
@Override
public BigDecimal getBigDecimal(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getBigDecimal(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBigDecimal(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public BigDecimal getBigDecimal(String columnLabel, int scale) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getBigDecimal(1, scale);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBigDecimal(standardizedLabel(columnLabel.toLowerCase()), scale);
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public InputStream getBinaryStream(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getBinaryStream(columnIndex - 2);
}
@Override
public InputStream getBinaryStream(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBinaryStream(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Blob getBlob(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getBlob(columnIndex - 2);
}
@Override
public Blob getBlob(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBlob(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public boolean getBoolean(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getBoolean(columnIndex - 2);
}
@Override
public boolean getBoolean(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBoolean(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public byte getByte(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getByte(columnIndex - 2);
// try {
// if (isValidType("byte", columnIndex)) {
// lastValue = queryResult.getValue(columnIndex-1);
//
// if (lastValue == null) {
// return 0;
// }
//
// return (byte) TypeCasting.toByte(lastValue);
// }
// else {
// throw new VerdictDBTypeException(queryResult.getValue(columnIndex-1));
// }
// }
// catch (VerdictDBTypeException e) {
// throw new SQLException(e.getMessage());
// }
}
@Override
public byte getByte(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getByte(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public byte[] getBytes(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getBytes(columnIndex - 2);
}
@Override
public byte[] getBytes(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getBytes(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Reader getCharacterStream(int columnIndex) throws SQLException {
checkIndex(columnIndex);
throw new SQLFeatureNotSupportedException();
}
@Override
public Reader getCharacterStream(String columnLabel) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public Clob getClob(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getClob(columnIndex - 2);
}
@Override
public Clob getClob(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getClob(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public int getConcurrency() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public String getCursorName() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public Date getDate(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getDate(columnIndex - 2);
}
@Override
public Date getDate(int columnIndex, Calendar cal) throws SQLException {
try {
FastDateFormat dateFormat = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss.SSS", cal.getTimeZone());
return new Date(dateFormat.parse(queryResult.getDate(columnIndex - 2).toString()).getTime());
} catch (Exception e) {
SQLException error = new SQLException("Error parsing date");
throw error;
}
}
@Override
public Date getDate(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getDate(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Date getDate(String columnLabel, Calendar cal) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
int index = columnLabel.indexOf(standardizedLabel(columnLabel)) + 1;
return getDate(index, cal);
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public double getDouble(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return lastQueryResultIndex;
}
checkIndex(columnIndex);
return queryResult.getDouble(columnIndex - 2);
}
@Override
public double getDouble(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getDouble(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getDouble(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public int getFetchDirection() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public int getFetchSize() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public float getFloat(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return lastQueryResultIndex;
}
checkIndex(columnIndex);
return queryResult.getFloat(columnIndex - 2);
}
@Override
public float getFloat(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getFloat(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getFloat(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public int getHoldability() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public int getInt(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return lastQueryResultIndex;
}
checkIndex(columnIndex);
return queryResult.getInt(columnIndex - 2);
}
@Override
public int getInt(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getInt(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getInt(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public long getLong(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return lastQueryResultIndex;
}
checkIndex(columnIndex);
return queryResult.getLong(columnIndex - 2);
}
@Override
public long getLong(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getLong(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getLong(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public ResultSetMetaData getMetaData() throws SQLException {
if (metadata == null && queryResult == null) {
try {
queryResult = queryResults.take();
metadata = new VerdictStreamResultSetMetaData(queryResult);
lastQueryResultIndex++;
} catch (InterruptedException e) {
}
} else if (metadata == null && queryResult != null) {
metadata = new VerdictStreamResultSetMetaData(queryResult);
}
return metadata;
}
@Override
public Reader getNCharacterStream(int columnIndex) throws SQLException {
return getCharacterStream(columnIndex);
}
@Override
public Reader getNCharacterStream(String columnLabel) throws SQLException {
return getCharacterStream(standardizedLabel(columnLabel));
}
@Override
public NClob getNClob(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getNClob(columnIndex - 2);
}
@Override
public NClob getNClob(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getNClob(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public String getNString(int columnIndex) throws SQLException {
return getString(columnIndex);
}
@Override
public String getNString(String columnLabel) throws SQLException {
return getString(standardizedLabel(columnLabel));
}
@Override
public Object getObject(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getValue(columnIndex - 2);
}
@Override
public T getObject(int columnIndex, Class type) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public Object getObject(int columnIndex, Map> map) throws SQLException {
return getObject(columnIndex);
}
@Override
public Object getObject(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return getObject(colNameIdx.get(standardizedLabel(columnLabel.toLowerCase())) + 1);
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public T getObject(String columnLabel, Class type) throws SQLException {
return (T) getObject(standardizedLabel(columnLabel));
}
@Override
public Object getObject(String columnLabel, Map> map) throws SQLException {
return getObject(standardizedLabel(columnLabel));
}
@Override
public Ref getRef(int columnIndex) throws SQLException {
return queryResult.getRef(columnIndex - 2);
}
@Override
public Ref getRef(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getRef(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public int getRow() throws SQLException {
return ((Long) rowIndex).intValue();
}
@Override
public RowId getRowId(int columnIndex) throws SQLException {
return queryResult.getRowId(columnIndex - 2);
}
@Override
public RowId getRowId(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getRowId(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public short getShort(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return Integer.valueOf(lastQueryResultIndex).shortValue();
}
checkIndex(columnIndex);
return queryResult.getShort(columnIndex - 2);
}
@Override
public short getShort(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getShort(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getShort(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public SQLXML getSQLXML(int columnIndex) throws SQLException {
return queryResult.getSQLXML(columnIndex - 2);
}
@Override
public SQLXML getSQLXML(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getSQLXML(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Statement getStatement() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public String getString(int columnIndex) throws SQLException {
if (columnIndex == 1) {
return Integer.valueOf(lastQueryResultIndex).toString();
}
return queryResult.getString(columnIndex - 2);
}
@Override
public String getString(String columnLabel) throws SQLException {
if (columnLabel.equals(verdictStreamSequenceColumn)) {
return getString(1);
}
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getString(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Time getTime(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getTime(columnIndex - 2);
}
@Override
public Time getTime(int columnIndex, Calendar cal) throws SQLException {
try {
FastDateFormat dateFormat = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss.SSS", cal.getTimeZone());
return new Time(dateFormat.parse(queryResult.getTime(columnIndex - 2).toString()).getTime());
} catch (Exception e) {
SQLException error = new SQLException("Error parsing time");
throw error;
}
}
@Override
public Time getTime(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getTime(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Time getTime(String columnLabel, Calendar cal) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
int index = columnLabel.indexOf(standardizedLabel(columnLabel)) + 1;
return getTime(index, cal);
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Timestamp getTimestamp(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getTimestamp(columnIndex - 2);
}
@Override
public Timestamp getTimestamp(int columnIndex, Calendar cal) throws SQLException {
try {
FastDateFormat dateFormat = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss.SSS", cal.getTimeZone());
return new Timestamp(dateFormat.parse(queryResult.getTimestamp(columnIndex - 2).toString()).getTime());
} catch (Exception e) {
SQLException error = new SQLException("Error parsing time stamp");
throw error;
}
}
@Override
public Timestamp getTimestamp(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getTimestamp(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public Timestamp getTimestamp(String columnLabel, Calendar cal) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
int index = columnLabel.indexOf(standardizedLabel(columnLabel)) + 1;
return getTimestamp(index, cal);
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public int getType() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public InputStream getUnicodeStream(int columnIndex) throws SQLException {
checkIndex(columnIndex);
return queryResult.getUnicodeStream(columnIndex - 2);
}
@Override
public InputStream getUnicodeStream(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getUnicodeStream(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public URL getURL(int columnIndex) throws SQLException {
return queryResult.getURL(columnIndex - 2);
}
@Override
public URL getURL(String columnLabel) throws SQLException {
if (colNameIdx.containsKey(standardizedLabel(columnLabel))) {
return queryResult.getURL(standardizedLabel(columnLabel.toLowerCase()));
} else throw new SQLException("ColumnLabel does not exist.");
}
@Override
public SQLWarning getWarnings() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void insertRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean isAfterLast() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean isBeforeFirst() throws SQLException {
return rowIndex == 0;
// return isBeforefirst;
}
@Override
public boolean isClosed() throws SQLException {
return isClosed;
}
@Override
public boolean isFirst() throws SQLException {
return rowIndex == 1;
// return isFirst;
}
@Override
public boolean isLast() throws SQLException {
throw new SQLFeatureNotSupportedException();
// throw new SQLFeatureNotSupportedException();
}
// TODO: what is the purpose of this function?
private boolean isValidType(String expected, int columnindex) {
return true;
// String actual = DataTypeConverter.typeName(queryResult.getColumnType(columnindex-1));
// if (queryResult.getColumnType(columnindex-1) == DOUBLE) actual = "real";
// if (expected.equals("boolean")) {
// return numericType.contains(actual) || actual.equals("boolean") || actual.equals("bit");
// }
// else if (expected.equals("byte")) {
// return numericType.contains(actual) || actual.equals("boolean") || actual.equals("bit");
// }
// else if (expected.equals("short")) {
// return numericType.contains(actual) || actual.equals("boolean") || actual.equals("bit");
// }
// else if (expected.equals("int")) {
// return numericType.contains(actual) || actual.equals("boolean") || actual.equals("bit");
// }
// else if (expected.equals("long")) {
// return numericType.contains(actual) || actual.equals("boolean") || actual.equals("bit");
// }
// else if (expected.equals("float")) {
// return numericType.contains(actual);
// }
// else if (expected.equals("double")) {
// return numericType.contains(actual);
// }
// else if (expected.equals("bigdecimal")) {
// return numericType.contains(actual);
// }
// else if (expected.equals("bytes")) {
// return actual.equals("binary") || actual.equals("varbinary") ||
// actual.equals("longvarbinary")
// || actual.equals("blob");
// }
// else if (expected.equals("date")) {
// return actual.equals("timestamp") || actual.equals("date") || actual.equals("time");
// }
// else if (expected.equals("time")) {
// return actual.equals("timestamp") || actual.equals("date") || actual.equals("time");
// }
// else if (expected.equals("timestamp")) {
// return actual.equals("timestamp") || actual.equals("date") || actual.equals("time");
// }
// else if (expected.equals("asciistream")) {
// return actual.equals("clob");
// }
// else if (expected.equals("binarystream")) {
// return actual.equals("blob") || actual.equals("binary") || actual.equals("varbinary")
// || actual.equals("longvarbinary");
// }
// else if (expected.equals("blob")) {
// return actual.equals("blob");
// }
// else if (expected.equals("clob")) {
// return actual.equals("clob");
// }
// else if (expected.equals("array")) {
// return actual.equals("array");
// }
// else if (expected.equals("ref")) {
// return actual.equals("ref");
// }
// else if (expected.equals("sqlxml")) {
// return actual.equals("xml");
// }
// else if (expected.equals("rowid")) {
// return actual.equals("rowid");
// }
// else if (expected.equals("nclob")) {
// return actual.equals("nclob");
// }
// else return false;
}
@Override
public boolean isWrapperFor(Class iface) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean last() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void moveToCurrentRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void moveToInsertRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
/**
* Require a mutex here. The stream is executed on the other thread. When the execution of the stream is finished,
* it will try to synchronize hasReadAllQueryResults flag by calling synchronized(hasReadAllQueryResults).
* And here are two cases: 1) next() executes first 2) the other thread executes first
*
* 1) If next() first executes, the flag hasReadAllQueryResults is still false. next() will try to take new queryResult
* from queryResults. As soon as, next doesn't acquire hasReadAllQueryResults flag. Then the other thread will take the
* acquire of hasReadAllQueryResults, append the queryresult and set the flag to be true. At that time, if another next() is called,
* it will get blocked at the line 'else if (queryResults.peek() == null && hasReadAllQueryResults)' until the other thread finishes
* its job.
*
* 2) If the other thread executes first, it will append the query result and set the flag to be true. Then waiting
* next() starts to execute. Since there are still queryResult in queryResults, next() will take it from the list so that
* the last queryResult won't be neglected. The second next() will return false, since queryResults.peek()==null and
* hasReadAllQueryResults==true.
*
* @return
* @throws SQLException
*/
@Override
public boolean next() throws SQLException {
if (isClosed) return false;
try {
// on the first call
if (queryResult == null && (!hasReadAllQueryResults || !queryResults.isEmpty())) {
queryResult = queryResults.take();
lastQueryResultIndex++;
}
boolean hasMore = queryResult.next();
if (hasMore) {
rowIndex++;
return true;
} else if (queryResults.peek() == null && hasReadAllQueryResults) {
return false;
} else {
queryResult = queryResults.take();
lastQueryResultIndex++;
return next();
}
} catch (InterruptedException e) {
return false;
}
}
@Override
public boolean previous() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void refreshRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean relative(int rows) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean rowDeleted() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean rowInserted() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean rowUpdated() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void setFetchDirection(int direction) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void setFetchSize(int rows) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
String standardizedLabel(String label) {
return label.toLowerCase();
}
@Override
public T unwrap(Class iface) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateArray(int columnIndex, Array x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateArray(String columnLabel, Array x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(int columnIndex, InputStream x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(int columnIndex, InputStream x, int length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(int columnIndex, InputStream x, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(String columnLabel, InputStream x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(String columnLabel, InputStream x, int length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateAsciiStream(String columnLabel, InputStream x, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBigDecimal(String columnLabel, BigDecimal x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(int columnIndex, InputStream x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(int columnIndex, InputStream x, int length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(int columnIndex, InputStream x, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(String columnLabel, InputStream x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(String columnLabel, InputStream x, int length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBinaryStream(String columnLabel, InputStream x, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(int columnIndex, Blob x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(int columnIndex, InputStream inputStream) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(int columnIndex, InputStream inputStream, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(String columnLabel, Blob x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(String columnLabel, InputStream inputStream) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBlob(String columnLabel, InputStream inputStream, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBoolean(int columnIndex, boolean x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBoolean(String columnLabel, boolean x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateByte(int columnIndex, byte x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateByte(String columnLabel, byte x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBytes(int columnIndex, byte[] x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateBytes(String columnLabel, byte[] x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(int columnIndex, Reader x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(int columnIndex, Reader x, int length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(String columnLabel, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(String columnLabel, Reader reader, int length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateCharacterStream(String columnLabel, Reader reader, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(int columnIndex, Clob x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(int columnIndex, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(int columnIndex, Reader reader, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(String columnLabel, Clob x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(String columnLabel, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateClob(String columnLabel, Reader reader, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateDate(int columnIndex, Date x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateDate(String columnLabel, Date x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateDouble(int columnIndex, double x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateDouble(String columnLabel, double x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateFloat(int columnIndex, float x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateFloat(String columnLabel, float x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateInt(int columnIndex, int x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateInt(String columnLabel, int x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateLong(int columnIndex, long x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateLong(String columnLabel, long x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNCharacterStream(int columnIndex, Reader x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNCharacterStream(String columnLabel, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNCharacterStream(String columnLabel, Reader reader, long length)
throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(int columnIndex, NClob nClob) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(int columnIndex, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(int columnIndex, Reader reader, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(String columnLabel, NClob nClob) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(String columnLabel, Reader reader) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNClob(String columnLabel, Reader reader, long length) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNString(int columnIndex, String nString) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNString(String columnLabel, String nString) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNull(int columnIndex) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateNull(String columnLabel) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateObject(int columnIndex, Object x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateObject(int columnIndex, Object x, int scaleOrLength) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateObject(String columnLabel, Object x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateObject(String columnLabel, Object x, int scaleOrLength) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateRef(int columnIndex, Ref x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateRef(String columnLabel, Ref x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateRow() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateRowId(int columnIndex, RowId x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateRowId(String columnLabel, RowId x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateShort(int columnIndex, short x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateShort(String columnLabel, short x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateSQLXML(int columnIndex, SQLXML xmlObject) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateSQLXML(String columnLabel, SQLXML xmlObject) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateString(int columnIndex, String x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateString(String columnLabel, String x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateTime(int columnIndex, Time x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateTime(String columnLabel, Time x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateTimestamp(int columnIndex, Timestamp x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void updateTimestamp(String columnLabel, Timestamp x) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public boolean wasNull() throws SQLException {
return queryResults.isEmpty();
}
}