| // @@@ START COPYRIGHT @@@ |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| // |
| // @@@ END COPYRIGHT @@@ |
| |
| package org.trafodion.jdbc.t4; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.sql.Blob; |
| import java.sql.SQLException; |
| import java.sql.Types; |
| |
| public class TrafT4Blob extends TrafT4Lob implements Blob |
| { |
| public TrafT4Blob(TrafT4Connection connection, String lobHandle, byte[] data) throws SQLException { |
| super(connection, lobHandle, data, Types.BLOB); |
| } |
| |
| @Override |
| public InputStream getBinaryStream() throws SQLException { |
| testAvailability(); |
| return new ByteArrayInputStream((byte[]) data_); |
| } |
| |
| @Override |
| public InputStream getBinaryStream(long pos, long length) throws SQLException { |
| testAvailability(); |
| return new ByteArrayInputStream((byte[]) data_); |
| } |
| |
| /* |
| * Retrieves all or part of the BLOB value that this Blob object represents, |
| * as an array of bytes. This byte array contains up to length consecutive |
| * bytes starting at position pos. |
| * */ |
| |
| @Override |
| public byte[] getBytes(long pos, int length) throws SQLException { |
| testAvailability(); |
| |
| byte[] buf = null; |
| int startPos = (int)pos - 1; |
| int endPos = startPos + length; |
| |
| byte[] binaryData = (byte[]) data_; |
| if ((startPos > binaryData.length) || (startPos < 0) || (length < 0)) |
| throw TrafT4Messages.createSQLException(this.connection_.props_, this.connection_.getLocale(), |
| "out_of_lob_bound", null); |
| |
| if ((endPos - 1) > binaryData.length) { |
| length = binaryData.length - startPos; |
| } |
| buf = new byte[length]; |
| System.arraycopy(binaryData, startPos, buf, 0, length); |
| |
| return buf; |
| } |
| |
| @Override |
| public int setBytes(long pos, byte[] bytes) throws SQLException { |
| testAvailability(); |
| |
| return setBytes(pos, bytes, 0, bytes.length); |
| } |
| |
| @Override |
| public int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException { |
| testAvailability(); |
| OutputStream out = setBinaryStream(pos); |
| |
| try { |
| out.write(bytes, offset, len); |
| } catch (IOException e) { |
| throw TrafT4Messages.createSQLException(this.connection_.props_, this.connection_.getLocale(), |
| "lob_io_error", e.getMessage()); |
| } finally { |
| try { |
| out.close(); |
| } catch (IOException e2) { |
| |
| } |
| } |
| return len; |
| } |
| |
| @Override |
| public long position(Blob pattern, long start) throws SQLException { |
| return position(pattern.getBytes(0, (int) pattern.length()), start); |
| } |
| |
| @Override |
| public long position(byte[] pattern, long start) throws SQLException { |
| TrafT4Messages.throwUnsupportedFeatureException(connection_.props_, connection_.getLocale(), "position()"); |
| return 0; |
| } |
| |
| @Override |
| public OutputStream setBinaryStream(long pos) throws SQLException { |
| testAvailability(); |
| return setOutputStream(pos); |
| } |
| |
| @Override |
| public void truncate(long len) throws SQLException { |
| testAvailability(); |
| |
| if (len < 0 || len > ((byte[]) data_).length) { |
| throw TrafT4Messages.createSQLException(this.connection_.props_, this.connection_.getLocale(), |
| "out_of_lob_bound", null); |
| } |
| |
| byte[] newData = new byte[(int) len]; |
| |
| System.arraycopy(this.data_, 0, newData, 0, (int) len); |
| |
| this.data_ = newData; |
| } |
| |
| /* |
| * After free has been called, any attempt to invoke a method other than |
| * free will result in a SQLException being thrown. |
| */ |
| private void testAvailability() throws SQLException { |
| if (isFreed_) |
| throw TrafT4Messages.createSQLException(null, null, "lob_has_been_freed", null); |
| } |
| |
| |
| @Override |
| public long length() throws SQLException { |
| testAvailability(); |
| return data_ == null ? 0 : ((byte[]) data_).length; |
| } |
| |
| @Override |
| public void free() throws SQLException { |
| data_ = null; |
| isFreed_ = true; |
| } |
| } |