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From kevinxu021 <...@git.apache.org>
Subject [GitHub] incubator-trafodion pull request #799: [TRAFODION-2308]JDBC T4 support read ...
Date Fri, 04 Nov 2016 07:55:26 GMT
Github user kevinxu021 commented on a diff in the pull request:

    https://github.com/apache/incubator-trafodion/pull/799#discussion_r86500287
  
    --- Diff: core/conn/jdbcT4/src/main/java/org/trafodion/jdbc/t4/TrafT4Blob.java ---
    @@ -0,0 +1,166 @@
    +// @@@ 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.util.logging.Level;
    +import java.util.logging.LogRecord;
    +
    +public class TrafT4Blob implements Blob {
    +	private byte[] data_;
    +	private boolean isFreed_ = false;
    +	private TrafT4Connection connection_ = null;
    +
    +	public TrafT4Blob(TrafT4Connection connection, String lobHandle) throws SQLException
{
    +		if (connection_.props_.t4Logger_.isLoggable(Level.FINE) == true) {
    +			Object p[] = T4LoggingUtilities.makeParams(connection_.props_, connection, lobHandle);
    +			connection_.props_.t4Logger_.logp(Level.FINE, "TrafT4ResultSet", "getClob", "", p);
    +		}
    +		if (connection_.props_.getLogWriter() != null) {
    +			LogRecord lr = new LogRecord(Level.FINE, "");
    +			Object p[] = T4LoggingUtilities.makeParams(connection_.props_, connection, lobHandle);
    +			lr.setParameters(p);
    +			lr.setSourceClassName("TrafT4ResultSet");
    +			lr.setSourceMethodName("getClob");
    +			T4LogFormatter lf = new T4LogFormatter();
    +			String temp = lf.format(lr);
    +			connection_.props_.getLogWriter().println(temp);
    +		}
    +	}
    +
    +	public InputStream getBinaryStream() throws SQLException {
    +		testAvailability();
    +		return new ByteArrayInputStream(this.data_);
    +	}
    +
    +	public InputStream getBinaryStream(long pos, long length) throws SQLException {
    +		testAvailability();
    +		TrafT4Messages.throwUnsupportedFeatureException(connection_.props_, connection_.getLocale(),
    +				"getBinaryStream()");
    +		return null;
    +	}
    +
    +	/*
    +	 * 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.
    +	 *  */
    +	public byte[] getBytes(long pos, int length) throws SQLException {
    +		testAvailability();
    +
    +		byte[] buf = null;
    +		int startPos = (int)pos - 1;
    +		int endPos = startPos + length;
    +
    +		if((startPos > data_.length) || (startPos < 0) || (length < 0))
    +			throw TrafT4Messages.createSQLException(this.connection_.props_, this.connection_.getLocale(),
    +					"out_of_lob_bound_msg", null);
    --- End diff --
    
    should be "out_of_log_bound"


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