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java.lang.Object com.metamatrix.common.types.BlobImpl
public class BlobImpl
This object holds a chunk of binary data and implements the JDBC Blob interface. This object presents a streaming interface but actually encapsulates the entire blob object. Connectors can construct this object when dealing with large objects.
Field Summary | |
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static int |
DEFAULT_MAX_SIZE
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Constructor Summary | |
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BlobImpl(java.sql.Blob blob)
Creates a MMBlob object by calling getBytes on the
Blob argument. |
|
BlobImpl(byte[] originalData)
Creates a MMBlob object by copying the data in originalData |
|
BlobImpl(java.io.InputStream in,
int length)
|
Method Summary | |
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boolean |
equals(java.lang.Object obj)
Compares two MMBlob objects for equality. |
void |
free()
|
java.io.InputStream |
getBinaryStream()
Retrieves the BLOB designated by this
Blob instance as a stream. |
java.io.InputStream |
getBinaryStream(long arg0,
long arg1)
|
byte[] |
getBytes(long pos,
int length)
Returns as an array of bytes, part or all of the BLOB
value that this Blob object designates. |
long |
length()
Returns the number of bytes in the BLOB value
designated by this Blob object. |
long |
position(java.sql.Blob pattern,
long start)
Determines the byte position in the BLOB value
designated by this Blob object at which
pattern begins. |
long |
position(byte[] pattern,
long start)
Determines the byte position at which the specified byte pattern begins within the BLOB
value that this Blob object represents. |
java.io.OutputStream |
setBinaryStream(long pos)
|
int |
setBytes(long pos,
byte[] bytes)
|
int |
setBytes(long pos,
byte[] bytes,
int offset,
int len)
|
java.lang.String |
toString()
Returns a String that is a comma delimited list of up to the first 5 and last 5 bytes of the Blob in Hexadecimal. |
void |
truncate(long len)
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Methods inherited from class java.lang.Object |
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clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final int DEFAULT_MAX_SIZE
Constructor Detail |
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public BlobImpl(java.sql.Blob blob) throws java.sql.SQLException
getBytes
on the
Blob
argument.
blob
- the Blob object to get the data from.
java.sql.SQLException
public BlobImpl(byte[] originalData)
originalData
originalData
- the array of bytes to copy into this MMBlob object.public BlobImpl(java.io.InputStream in, int length) throws java.sql.SQLException
java.sql.SQLException
Method Detail |
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public java.io.InputStream getBinaryStream() throws java.sql.SQLException
BLOB
designated by this
Blob
instance as a stream.
getBinaryStream
in interface java.sql.Blob
BLOB
data
java.sql.SQLException
- if there is an error accessing the
BLOB
public byte[] getBytes(long pos, int length) throws java.sql.SQLException
BLOB
value that this Blob
object designates. The byte
array contains up to length
consecutive bytes
starting at position pos
.
getBytes
in interface java.sql.Blob
pos
- the ordinal position of the first byte in the
BLOB
value to be extracted; the first byte is at
position 1length
- the number of consecutive bytes to be copied
length
consecutive bytes from the BLOB
value designated
by this Blob
object, starting with the
byte at position pos
java.sql.SQLException
- if there is an error accessing the
BLOB
public long length() throws java.sql.SQLException
BLOB
value
designated by this Blob
object.
length
in interface java.sql.Blob
BLOB
in bytes
java.sql.SQLException
- if there is an error accessing the
length of the BLOB
public long position(java.sql.Blob pattern, long start) throws java.sql.SQLException
BLOB
value
designated by this Blob
object at which
pattern
begins. The search begins at position
start
.
position
in interface java.sql.Blob
pattern
- the Blob
object designating
the BLOB
value for which to searchstart
- the position in the BLOB
value
at which to begin searching; the first position is 1
java.sql.SQLException
- if there is an error accessing the
BLOB
public long position(byte[] pattern, long start) throws java.sql.SQLException
pattern
begins within the BLOB
value that this Blob
object represents. The
search for pattern
begins at position
start
.
position
in interface java.sql.Blob
pattern
- the byte array for which to searchstart
- the position at which to begin searching; the
first position is 1
java.sql.SQLException
- if there is an error accessing the
BLOB
public boolean equals(java.lang.Object obj)
equals
in class java.lang.Object
Object.equals(Object)
public java.lang.String toString()
toString
in class java.lang.Object
public int setBytes(long pos, byte[] bytes) throws java.sql.SQLException
setBytes
in interface java.sql.Blob
java.sql.SQLException
Blob.setBytes(long, byte[])
public int setBytes(long pos, byte[] bytes, int offset, int len) throws java.sql.SQLException
setBytes
in interface java.sql.Blob
java.sql.SQLException
Blob.setBytes(long, byte[], int, int)
public java.io.OutputStream setBinaryStream(long pos) throws java.sql.SQLException
setBinaryStream
in interface java.sql.Blob
java.sql.SQLException
Blob.setBinaryStream(long)
public void truncate(long len) throws java.sql.SQLException
truncate
in interface java.sql.Blob
java.sql.SQLException
Blob.truncate(long)
public void free() throws java.sql.SQLException
free
in interface java.sql.Blob
java.sql.SQLException
public java.io.InputStream getBinaryStream(long arg0, long arg1) throws java.sql.SQLException
getBinaryStream
in interface java.sql.Blob
java.sql.SQLException
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