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com.alachisoft.ncache.client.internal.caching.ClientDataReader Maven / Gradle / Ivy
package com.alachisoft.ncache.client.internal.caching;
import Alachisoft.NCache.Caching.CompressedValueEntry;
import Alachisoft.NCache.Common.Queries.QueryKeyWords;
import com.alachisoft.ncache.client.CacheReader;
import Alachisoft.NCache.Common.ErrorHandling.ErrorCodes;
import Alachisoft.NCache.Common.ErrorHandling.ErrorMessages;
import com.alachisoft.ncache.runtime.exceptions.CacheException;
import com.alachisoft.ncache.runtime.exceptions.OperationFailedException;
import com.alachisoft.ncache.runtime.JSON.JsonUtil;
import java.io.IOException;
class ClientDataReader extends DataReaderCommon implements CacheReader
{
private ClientRecordSetEnumerator _clientRecordSetEnumerator;
private Object[] _currentRow;
private static final String keyColumnName = "$KEY$";
private static final String valueColumnName = "$VALUE$";
public ClientDataReader(ClientRecordSetEnumerator clientRecordSetEnumerator)
{
this(null, clientRecordSetEnumerator);
}
public ClientDataReader(CacheImpl cache, ClientRecordSetEnumerator clientRecordSetEnumerator)
{
_cache = cache;
_clientRecordSetEnumerator = clientRecordSetEnumerator;
}
public void close()
{
if (_clientRecordSetEnumerator != null)
{
_clientRecordSetEnumerator.dispose();
}
}
public boolean read() throws CacheException {
if (_clientRecordSetEnumerator == null)
{
return false;
}
boolean next = _clientRecordSetEnumerator.moveNext();
if (next)
{
_currentRow = _clientRecordSetEnumerator.getCurrent();
}
return next;
}
public boolean getBoolean(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (boolean)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public String getString(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return _currentRow[index] == null ? null: _currentRow[index].toString();
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public java.math.BigDecimal getBigDecimal(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (java.math.BigDecimal)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public double getDouble(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (double)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public short getShort(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (short)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public int getInt(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (int)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public long getLong(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
return (long)(_currentRow[index]);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public T getValue(int index, Class cls) throws ClassNotFoundException, OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
Object obj = _currentRow[index];
CompressedValueEntry cmpEntry = (CompressedValueEntry)((obj instanceof CompressedValueEntry) ? obj : null);
if (cmpEntry != null)
{
try {
obj = extractFromCompressedValueEntry(cmpEntry, cls);
} catch (IOException e) {
throw new OperationFailedException(e);
}
}
return JsonUtil.getValueAs(obj, cls);
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
@Override
public T getValue(String columnName, Class cls) throws IOException, ClassNotFoundException, OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
int index = getOrdinal(columnName);
Object obj = _currentRow[index];
CompressedValueEntry cmpEntry = (CompressedValueEntry)((obj instanceof CompressedValueEntry) ? obj : null);
if (cmpEntry != null)
{
obj = extractFromCompressedValueEntry(cmpEntry, cls);
}
return JsonUtil.getValueAs(obj,cls);
}
public int getValues(Object[] objects, Class cls) throws ClassNotFoundException, OperationFailedException {
if (objects == null)
{
throw new IllegalArgumentException("objects");
}
if (objects.length == 0)
{
throw new IllegalArgumentException("Index was outside the bounds of the array.");
}
if (objects.length < this.getFieldCount())
{
for (int i = 0; i < objects.length; i++)
{
objects[i] = this.getSingleValue(i,(cls==null?Object.class:cls));
}
return objects.length;
}
else
{
for (int i = 0; i < this.getFieldCount(); i++)
{
objects[i] = this.getSingleValue(i,(cls==null?Object.class:cls));
}
return this.getFieldCount();
}
}
private T getSingleValue(int index, Class cls) throws ClassNotFoundException, OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
Object obj = _currentRow[index];
CompressedValueEntry cmpEntry = (CompressedValueEntry)((obj instanceof CompressedValueEntry) ? obj : null);
if (cmpEntry != null)
{
try {
obj = extractObjectFromCompressedValueEntry(cmpEntry, cls );
} catch (IOException e) {
throw new OperationFailedException(e);
}
}
return (T) obj;
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public String getName(int columnIndex)
{
if (columnIndex >= 0 && columnIndex < getFieldCount())
{
String columnName = "";
switch (columnIndex)
{
case 0:
columnName = keyColumnName;
break;
case 1:
columnName = valueColumnName;
break;
}
return columnName;
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public int getOrdinal(String columnName)
{
if (columnName.equalsIgnoreCase(keyColumnName))
{
return 0;
}
else if (columnName.equalsIgnoreCase(valueColumnName))
{
return 1;
}
else
{
throw new IllegalArgumentException("Invalid columnName. Specified column does not exist in RecordSet.");
}
}
public boolean getIsClosed()
{
return _clientRecordSetEnumerator == null;
}
public java.util.Date getDate(int index) throws OperationFailedException {
if (_currentRow == null)
{
throw new OperationFailedException(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED, ErrorMessages.getErrorMessage(ErrorCodes.Queries.CURRENT_STATE_NOT_SUPPORTED));
}
if (index >= 0 && index < getFieldCount())
{
Object obj = _currentRow[index];
return (java.util.Date)obj;
}
else
{
throw new IllegalArgumentException("Invalid index. Specified index does not exist in RecordSet.");
}
}
public int getFieldCount()
{
return _clientRecordSetEnumerator == null ? 0 : _clientRecordSetEnumerator.getFieldCount();
}
private void dispose(boolean disposing)
{
close();
_currentRow = null;
}
public void dispose()
{
dispose(true);
}
protected void finalize() throws Throwable
{
dispose(false);
}
@Override
protected boolean tryGetKeyFromCurrentRow(tangible.RefObject key)
{
Object possiblyKey = _currentRow[getOrdinal(QueryKeyWords.KeyColumn)];
key.argvalue = possiblyKey == null ? null : possiblyKey.toString();
return key.argvalue != null;
}
}
