com.davisor.data.stream
Class SimpleDataBuffer

java.lang.Object
  com.davisor.data.stream.SimpleDataBuffer

All Implemented Interfaces:

Data, DataBuffer, DataSource

public class SimpleDataBuffer

extends java.lang.Object

implements DataBuffer

SimpleDataBuffer is a DataBuffer implementation for single DataValues.

Since:

JDK1.2

See Also:

Type

Field Summary

protected DataValue

value The data value.

Constructor Summary

SimpleDataBuffer(DataValue value)
Constructs a new SimpleDataBuffer from the given DataValue.

Method Summary

boolean	close() Dummy implementation for data buffer case.
boolean	equals(java.lang.Object o) Tests if given object equals to this.
DataValue	getData(int index) Gets the specific data element from the data buffer.
int	getSize() Gets the number of data elements in the data buffer.
DataStream	getStream() Gets a new data stream from the data source.
DataStream	getStream(boolean reversed) Gets a new data stream from the data source.
Type	getType() Gets the type of this data object.
int	hashCode() Returns the hash code of the underlying DataValue.
void	setData(DataValue value)
java.lang.String	toString() Returns the string representation of this data buffer.
java.lang.String	toString(java.lang.String id, java.lang.String dataName) Returns a String representation of the DataSource.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

value

protected DataValue value

The data value.

Constructor Detail

SimpleDataBuffer

public SimpleDataBuffer(DataValue value)

Constructs a new SimpleDataBuffer from the given DataValue.

Method Detail

getType

public Type getType()
             throws InvalidDataException

Gets the type of this data object.

Specified by:

getType in interface Data

Returns:

the type associated with this data object

Throws:

InvalidDataException - if type retrieval fails

getData

public DataValue getData(int index)
                  throws com.davisor.core.InvalidIndexException

Gets the specific data element from the data buffer.

Specified by:

getData in interface DataBuffer

Parameters:

index - data element index

Throws:

com.davisor.core.InvalidIndexException - if no data is bound to given index

getSize

public int getSize()

Gets the number of data elements in the data buffer.

Specified by:

getSize in interface DataBuffer

getStream

public DataStream getStream(boolean reversed)
                     throws InvalidDataException

Gets a new data stream from the data source.

Specified by:

getStream in interface DataBuffer

Parameters:

reversed - controls if stream reads buffer forwards or backwards

Throws:

InvalidDataException - if a new stream can not be created

close

public boolean close()

Dummy implementation for data buffer case.

Specified by:

close in interface DataSource

Returns:

true

getStream

public DataStream getStream()
                     throws InvalidDataException

Gets a new data stream from the data source.

Specified by:

getStream in interface DataSource

Throws:

InvalidDataException

toString

public java.lang.String toString(java.lang.String id,
                                 java.lang.String dataName)

Returns a String representation of the DataSource. The possible id and dataname are is overridden with the given calues.

Specified by:

toString in interface DataSource

equals

public boolean equals(java.lang.Object o)

Tests if given object equals to this.

hashCode

public int hashCode()

Returns the hash code of the underlying DataValue.

toString

public java.lang.String toString()

Returns the string representation of this data buffer.

setData

public void setData(DataValue value)