cubrid.jdbc.driver.CUBRIDBlobInputStream Maven / Gradle / Ivy
The newest version!
/*
* Copyright (C) 2008 Search Solution Corporation. All rights reserved by Search Solution.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
*/
package cubrid.jdbc.driver;
import java.io.IOException;
import java.io.InputStream;
import java.sql.SQLException;
class CUBRIDBlobInputStream extends InputStream {
private CUBRIDBlob blob;
private long lob_pos;
private long lob_length;
CUBRIDBlobInputStream(CUBRIDBlob blob, long pos, long length)
throws SQLException {
this.blob = blob;
lob_pos = pos;
lob_length = pos - 1 + length;
if (lob_length > blob.length() || lob_length < 0) // overflowed
{
lob_length = blob.length();
}
}
/*
* java.io.InputStream interface
*/
/*
public int available() throws IOException {
return 0;
}
*/
public synchronized int read() throws IOException {
byte[] b = new byte[1];
if (read(b, 0, 1) == 1)
return (0xff & b[0]);
else
return -1;
}
/*
public synchronized int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
*/
public synchronized int read(byte[] b, int off, int len) throws IOException {
if (blob == null)
return -1;
if (b == null)
throw new NullPointerException();
if (off < 0 || len < 0 || off + len > b.length)
throw new IndexOutOfBoundsException();
int read_len;
try {
if (lob_pos - 1 + len > lob_length) {
len = (int) (lob_length - lob_pos + 1);
if (len < 0)
len = 0;
}
byte[] buf = blob.getBytes(lob_pos, len);
System.arraycopy(buf, 0, b, off, buf.length);
read_len = buf.length;
} catch (SQLException e) {
throw new IOException(e.getMessage());
}
lob_pos += read_len;
if (read_len < len || lob_pos > lob_length) {
blob = null;
}
return read_len;
}
public synchronized long skip(long n) throws IOException {
if (n <= 0)
return 0;
if (blob == null)
return 0;
long lob_remains_len = lob_length - lob_pos + 1;
if (n > lob_remains_len) {
n = lob_remains_len;
blob = null;
}
lob_pos += n;
return n;
}
public synchronized void close() throws IOException {
blob = null;
}
/*
public void mark(int readlimit) {
}
*/
/*
public void reset() throws IOException {
throw new IOException("Not supported mark and reset operation");
}
*/
/*
public boolean markSupported() {
return false;
}
*/
}