| // SPDX-License-Identifier: LGPL-2.1-or-later |
| // Copyright (c) 2012-2014 Monty Program Ab |
| // Copyright (c) 2015-2021 MariaDB Corporation Ab |
| |
| package org.mariadb.jdbc.plugin.codec; |
| |
| import java.io.*; |
| import java.sql.SQLDataException; |
| import java.util.Calendar; |
| import java.util.EnumSet; |
| import org.mariadb.jdbc.client.*; |
| import org.mariadb.jdbc.client.socket.Writer; |
| import org.mariadb.jdbc.plugin.Codec; |
| import org.mariadb.jdbc.util.constants.ServerStatus; |
| |
| /** InputStream codec */ |
| public class StreamCodec implements Codec<InputStream> { |
| |
| /** default instance */ |
| public static final StreamCodec INSTANCE = new StreamCodec(); |
| |
| private static final EnumSet<DataType> COMPATIBLE_TYPES = |
| EnumSet.of( |
| DataType.VARCHAR, |
| DataType.VARSTRING, |
| DataType.STRING, |
| DataType.BLOB, |
| DataType.TINYBLOB, |
| DataType.MEDIUMBLOB, |
| DataType.LONGBLOB); |
| |
| public String className() { |
| return InputStream.class.getName(); |
| } |
| |
| public boolean canDecode(ColumnDecoder column, Class<?> type) { |
| return COMPATIBLE_TYPES.contains(column.getType()) && type.isAssignableFrom(InputStream.class); |
| } |
| |
| @Override |
| public InputStream decodeText(ReadableByteBuf buf, int length, ColumnDecoder column, Calendar cal) |
| throws SQLDataException { |
| switch (column.getType()) { |
| case STRING: |
| case VARCHAR: |
| case VARSTRING: |
| case BLOB: |
| case TINYBLOB: |
| case MEDIUMBLOB: |
| case LONGBLOB: |
| ByteArrayInputStream is = new ByteArrayInputStream(buf.buf(), buf.pos(), length); |
| buf.skip(length); |
| return is; |
| default: |
| buf.skip(length); |
| throw new SQLDataException( |
| String.format("Data type %s cannot be decoded as Stream", column.getType())); |
| } |
| } |
| |
| @Override |
| public InputStream decodeBinary( |
| ReadableByteBuf buf, int length, ColumnDecoder column, Calendar cal) throws SQLDataException { |
| switch (column.getType()) { |
| case STRING: |
| case VARCHAR: |
| case VARSTRING: |
| case BLOB: |
| case TINYBLOB: |
| case MEDIUMBLOB: |
| case LONGBLOB: |
| ByteArrayInputStream is = new ByteArrayInputStream(buf.buf(), buf.pos(), length); |
| buf.skip(length); |
| return is; |
| default: |
| buf.skip(length); |
| throw new SQLDataException( |
| String.format("Data type %s cannot be decoded as Stream", column.getType())); |
| } |
| } |
| |
| public boolean canEncode(Object value) { |
| return value instanceof InputStream; |
| } |
| |
| @Override |
| public void encodeText(Writer encoder, Context context, Object value, Calendar cal, Long maxLen) |
| throws IOException { |
| encoder.writeBytes(ByteArrayCodec.BINARY_PREFIX); |
| byte[] array = new byte[4096]; |
| int len; |
| InputStream stream = (InputStream) value; |
| |
| if (maxLen == null) { |
| while ((len = stream.read(array)) > 0) { |
| encoder.writeBytesEscaped( |
| array, len, (context.getServerStatus() & ServerStatus.NO_BACKSLASH_ESCAPES) != 0); |
| } |
| } else { |
| while ((len = stream.read(array)) > 0 && maxLen > 0) { |
| encoder.writeBytesEscaped( |
| array, |
| Math.min(len, maxLen.intValue()), |
| (context.getServerStatus() & ServerStatus.NO_BACKSLASH_ESCAPES) != 0); |
| maxLen -= len; |
| } |
| } |
| encoder.writeByte('\''); |
| } |
| |
| @Override |
| public void encodeBinary(Writer encoder, Object value, Calendar cal, Long maxLength) |
| throws IOException { |
| // length is not known |
| byte[] blobBytes = new byte[4096]; |
| int pos = 0; |
| byte[] array = new byte[4096]; |
| InputStream stream = (InputStream) value; |
| |
| int len; |
| if (maxLength == null) { |
| while ((len = stream.read(array)) > 0) { |
| if (blobBytes.length - pos < len) { |
| byte[] newBlobBytes = new byte[blobBytes.length + 65536]; |
| System.arraycopy(blobBytes, 0, newBlobBytes, 0, blobBytes.length); |
| blobBytes = newBlobBytes; |
| } |
| System.arraycopy(array, 0, blobBytes, pos, len); |
| pos += len; |
| } |
| } else { |
| long remainingLen = maxLength; |
| while ((len = stream.read(array)) > 0 && remainingLen > 0) { |
| len = Math.min((int) remainingLen, len); |
| if (blobBytes.length - pos < len) { |
| byte[] newBlobBytes = new byte[blobBytes.length + 65536]; |
| System.arraycopy(blobBytes, 0, newBlobBytes, 0, blobBytes.length); |
| blobBytes = newBlobBytes; |
| } |
| System.arraycopy(array, 0, blobBytes, pos, len); |
| pos += len; |
| remainingLen -= len; |
| } |
| } |
| encoder.writeLength(pos); |
| encoder.writeBytes(blobBytes, 0, pos); |
| } |
| |
| @Override |
| public void encodeLongData(Writer encoder, InputStream value, Long maxLength) throws IOException { |
| byte[] array = new byte[4096]; |
| int len; |
| if (maxLength == null) { |
| while ((len = value.read(array)) > 0) { |
| encoder.writeBytes(array, 0, len); |
| } |
| } else { |
| long maxLen = maxLength; |
| while ((len = value.read(array)) > 0 && maxLen > 0) { |
| encoder.writeBytes(array, 0, Math.min(len, (int) maxLen)); |
| maxLen -= len; |
| } |
| } |
| } |
| |
| @Override |
| public byte[] encodeData(InputStream value, Long maxLength) throws IOException { |
| ByteArrayOutputStream bb = new ByteArrayOutputStream(); |
| byte[] array = new byte[4096]; |
| int len; |
| if (maxLength == null) { |
| while ((len = value.read(array)) > 0) { |
| bb.write(array, 0, len); |
| } |
| } else { |
| long maxLen = maxLength; |
| while ((len = value.read(array)) > 0 && maxLen > 0) { |
| bb.write(array, 0, Math.min(len, (int) maxLen)); |
| maxLen -= len; |
| } |
| } |
| return bb.toByteArray(); |
| } |
| |
| public int getBinaryEncodeType() { |
| return DataType.BLOB.get(); |
| } |
| |
| public boolean canEncodeLongData() { |
| return true; |
| } |
| } |