/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed 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.
 */

package org.springframework.jdbc.support.lob;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.SQLException;

import org.springframework.lang.Nullable;
import org.springframework.util.StreamUtils;

Simple JDBC Blob adapter that exposes a given byte array or binary stream. Optionally used by DefaultLobHandler.
Author:Juergen Hoeller
Since:2.5.3
/** * Simple JDBC {@link Blob} adapter that exposes a given byte array or binary stream. * Optionally used by {@link DefaultLobHandler}. * * @author Juergen Hoeller * @since 2.5.3 */
class PassThroughBlob implements Blob { @Nullable private byte[] content; @Nullable private InputStream binaryStream; private long contentLength; public PassThroughBlob(byte[] content) { this.content = content; this.contentLength = content.length; } public PassThroughBlob(InputStream binaryStream, long contentLength) { this.binaryStream = binaryStream; this.contentLength = contentLength; } @Override public long length() throws SQLException { return this.contentLength; } @Override public InputStream getBinaryStream() throws SQLException { if (this.content != null) { return new ByteArrayInputStream(this.content); } else { return (this.binaryStream != null ? this.binaryStream : StreamUtils.emptyInput()); } } @Override public InputStream getBinaryStream(long pos, long length) throws SQLException { throw new UnsupportedOperationException(); } @Override public OutputStream setBinaryStream(long pos) throws SQLException { throw new UnsupportedOperationException(); } @Override public byte[] getBytes(long pos, int length) throws SQLException { throw new UnsupportedOperationException(); } @Override public int setBytes(long pos, byte[] bytes) throws SQLException { throw new UnsupportedOperationException(); } @Override public int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException { throw new UnsupportedOperationException(); } @Override public long position(byte[] pattern, long start) throws SQLException { throw new UnsupportedOperationException(); } @Override public long position(Blob pattern, long start) throws SQLException { throw new UnsupportedOperationException(); } @Override public void truncate(long len) throws SQLException { throw new UnsupportedOperationException(); } @Override public void free() throws SQLException { // no-op } }