public class IlvVMAPTable extends Object
IlvVMAPTable
encapsulates a VMAP table and reads records from
it.Constructor and Description |
---|
IlvVMAPTable(String fileName)
Constructs an
IlvVMAPTable object from the specified
filename. |
Modifier and Type | Method and Description |
---|---|
void |
closeVMAPDataInput()
Closes the underlying data connection.
|
int |
getColumnCount()
Returns the number of columns in this table.
|
int |
getColumnIndex(String columnName)
Returns the index of the column with the name specified.
|
AbstractColumnInfo |
getColumnInfo(int columnIndex)
Returns the
AbstractColumnInfo object for a specified
column index. |
String |
getColumnName(int columnIndex)
Returns the name of a specified column.
|
String |
getFileName()
Returns the filename for this table.
|
Object[] |
getRecord(int recordIndex)
Returns the record for the index specified.
|
int |
getRecordCount()
Returns the number of records in this table.
|
Object |
getRecordFieldByIndex(int recordIndex,
int fieldIndex)
Returns the value of a particular column, specified by its index for a
specific record.
|
Object |
getRecordFieldByName(int recordIndex,
String fieldName)
Returns the value of a particular column, specified by name for a
specific record.
|
boolean |
isLSBFirst()
Returns
true if this table has least significant byte
first encoding. |
double |
readDouble(IlvVMAPDataInput VMAPDataInput)
Reads a
double instance (8 bytes) from the specified
stream, according to the byte order of this table. |
float |
readFloat(IlvVMAPDataInput VMAPDataInput)
Read a
float instance (4 bytes) from the specified stream,
according to the byte order of this table. |
int |
readInt(byte[] byteArray)
Reads an integer from a byte array (length must be >= 4), according to
the byte order specified in this table.
|
int |
readInt(IlvVMAPDataInput VMAPDataInput)
Reads an
int object (4 bytes) from the specified stream,
according to the byte order of this table. |
long |
readLong(IlvVMAPDataInput VMAPDataInput)
Reads a
long instance (8 bytes) from the specified stream,
according to the byte order of this table. |
short |
readShort(IlvVMAPDataInput VMAPDataInput)
Reads a
short object (2 bytes) from the specified stream,
according to the byte order of this table. |
void |
readTable(boolean fullyRead)
Constructs this
IlvVMAPTable object by reading attributes
from the associated file. |
int |
searchRecordByColumnValue(int columnIndex,
Object value)
Search for the first record encountered that contains a specified value
for a specific column.
|
public IlvVMAPTable(String fileName)
IlvVMAPTable
object from the specified
filename.fileName
- The filename to read the table from.public String getFileName()
public boolean isLSBFirst()
true
if this table has least significant byte
first encoding.true
is returned.public void readTable(boolean fullyRead) throws IOException, IlvVMAPFormatException
IlvVMAPTable
object by reading attributes
from the associated file.fullyRead
- If true
, the whole table is loaded into
memory, otherwise records are read on demand.IOException
IlvVMAPFormatException
public void closeVMAPDataInput() throws IOException
IOException
public int readInt(byte[] byteArray)
byteArray
- The byte array (4 bytes) from which to read an integer.int
value of this array.public int readInt(IlvVMAPDataInput VMAPDataInput) throws IOException
int
object (4 bytes) from the specified stream,
according to the byte order of this table.VMAPDataInput
- The VMAP data input to read from.IOException
public short readShort(IlvVMAPDataInput VMAPDataInput) throws IOException
short
object (2 bytes) from the specified stream,
according to the byte order of this table.VMAPDataInput
- The VMAP data input to read from.IOException
public long readLong(IlvVMAPDataInput VMAPDataInput) throws IOException
long
instance (8 bytes) from the specified stream,
according to the byte order of this table.VMAPDataInput
- The VMAP data input to read from.IOException
public float readFloat(IlvVMAPDataInput VMAPDataInput) throws IOException
float
instance (4 bytes) from the specified stream,
according to the byte order of this table.VMAPDataInput
- The VMAP data input to read from.IOException
public double readDouble(IlvVMAPDataInput VMAPDataInput) throws IOException
double
instance (8 bytes) from the specified
stream, according to the byte order of this table.VMAPDataInput
- The VMAP data input to read from.IOException
public Object[] getRecord(int recordIndex) throws IOException, IlvVMAPFormatException
recordIndex
- The index of the record.recordIndex
is
out of bounds, null
is returned.IOException
IlvVMAPFormatException
public Object getRecordFieldByName(int recordIndex, String fieldName) throws IOException, IlvVMAPFormatException
recordIndex
- The index of the record.fieldName
- The field name.IOException
IlvVMAPFormatException
public Object getRecordFieldByIndex(int recordIndex, int fieldIndex) throws IOException, IlvVMAPFormatException
recordIndex
- The record index.fieldIndex
- The field index.IOException
IlvVMAPFormatException
public int searchRecordByColumnValue(int columnIndex, Object value) throws IOException, IlvVMAPFormatException
Note: this implementation is slow.
columnIndex
- The column index.value
- The value to search for.IOException
IlvVMAPFormatException
public int getColumnCount()
public String getColumnName(int columnIndex)
columnIndex
- The column index.public AbstractColumnInfo getColumnInfo(int columnIndex)
AbstractColumnInfo
object for a specified
column index.columnIndex
- The column index.public int getColumnIndex(String columnName)
columnName
- The column name.-1
is returned.spublic int getRecordCount()
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