com.ergotech.vib.servers.plc

Class PLCDataBlock

java.lang.Object

com.ergotech.vib.servers.plc.PLCDataBlock

Direct Known Subclasses:

ControlLogixDataBlock, ControlLogixResponseDataBlock, DF1DataBlock, ModbusDataBlock, PPIDataBlock

public class PLCDataBlock
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	cvsRev

Constructor Summary

Constructors

Constructor and Description
PLCDataBlock() This will create an empty data block with an offset and length of zero and null data.
PLCDataBlock(byte[] data) This will create a data block with an offset of zero and a length of the total length of the data.
PLCDataBlock(byte[] data, int offset, int length) This will create a data block with the specified offset and a length.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object test) Check for equality.
byte[]	getData() Returns the data array.
int	getLength() Returns the length.
int	getOffset() Returns the offset.
void	setData(byte[] data) Sets the data array.
void	setLength(int length) Sets the length of the data.
void	setOffset(int offset) Sets the offset.

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cvsRev

public static final java.lang.String cvsRev

See Also:

Constant Field Values

Constructor Detail

PLCDataBlock

public PLCDataBlock()

This will create an empty data block with an offset and length of zero and null data. This can be passed into a method and used to return data.

PLCDataBlock

public PLCDataBlock(byte[] data)

This will create a data block with an offset of zero and a length of the total length of the data.

PLCDataBlock

public PLCDataBlock(byte[] data,
                    int offset,
                    int length)

This will create a data block with the specified offset and a length.

Method Detail

equals

public boolean equals(java.lang.Object test)

Check for equality. This compares the type, then the length, offset and finally the data.

Overrides:

equals in class java.lang.Object

getData

public byte[] getData()

Returns the data array.

getLength

public int getLength()

Returns the length.

getOffset

public int getOffset()

Returns the offset.

setData

public void setData(byte[] data)

Sets the data array. This also sets the offset to zero and the length to the length of the data array.

setLength

public void setLength(int length)

Sets the length of the data.

setOffset

public void setOffset(int offset)

Sets the offset. This will also decrease the length by the amount of the offset