Implement ByteArrayInputStreamCodec

Author: dongKos

r2dbc-mysql/src/main/java/io/asyncer/r2dbc/mysql/codec/ByteArrayInputStreamCodec.java

@@ -0,0 +1,156 @@
+/*
+ * Copyright 2023 asyncer.io projects
+ *
+ * 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
+ *
+ *     https://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 io.asyncer.r2dbc.mysql.codec;
+
+import io.asyncer.r2dbc.mysql.MySqlParameter;
+import io.asyncer.r2dbc.mysql.ParameterWriter;
+import io.asyncer.r2dbc.mysql.api.MySqlReadableMetadata;
+import io.asyncer.r2dbc.mysql.constant.MySqlType;
+import io.asyncer.r2dbc.mysql.internal.util.VarIntUtils;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import reactor.core.publisher.Mono;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import static io.asyncer.r2dbc.mysql.internal.util.InternalArrays.EMPTY_BYTES;
+
+/**
+ * Codec for {@link InputStream}.
+ */
+final class ByteArrayInputStreamCodec extends AbstractClassedCodec<ByteArrayInputStream> {
+
+    static final ByteArrayInputStreamCodec INSTANCE = new ByteArrayInputStreamCodec();
+
+    private ByteArrayInputStreamCodec() {
+        super(ByteArrayInputStream.class);
+    }
+
+    @Override
+    public ByteArrayInputStream decode(ByteBuf value, MySqlReadableMetadata metadata, Class<?> target, boolean binary,
+        CodecContext context) {
+        if (!value.isReadable()) {
+            return new ByteArrayInputStream(EMPTY_BYTES);
+        }
+        return new ByteArrayInputStream(value.array());
+    }
+
+    @Override
+    protected boolean doCanDecode(MySqlReadableMetadata metadata) {
+        return metadata.getJavaType() == InputStream.class;
+    }
+
+    @Override
+    public boolean canEncode(Object value) {
+        return value instanceof InputStream;
+    }
+
+    @Override
+    public MySqlParameter encode(Object value, CodecContext context) {
+        return new ByteArrayInputStreamMysqlParameter((ByteArrayInputStream) value);
+    }
+
+    private static final class ByteArrayInputStreamMysqlParameter extends AbstractMySqlParameter {
+
+        private final ByteArrayInputStream value;
+
+        private ByteArrayInputStreamMysqlParameter(ByteArrayInputStream value) {
+            this.value = value;
+        }
+
+        @Override
+        public Mono<ByteBuf> publishBinary(ByteBufAllocator allocator) {
+            return Mono.fromSupplier(() -> {
+                int size = value.available();
+                if (size == 0) {
+                    return allocator.buffer(Byte.BYTES).writeByte(0);
+                }
+
+                int addedSize = VarIntUtils.varIntBytes(size);
+                ByteBuf buf = allocator.buffer(addedSize + size);
+
+                try {
+                    VarIntUtils.writeVarInt(buf, size);
+
+                    byte[] byteArray = new byte[size];
+                    int readBytes = value.read(byteArray);
+
+                    // ✅ size == 0 이면 readBytes == -1 이어도 무시
+                    if (size != 0 && readBytes != size) {
+                        buf.release();
+                        throw new IllegalStateException("Expected to read " + size + " bytes, but got " + readBytes);
+                    }
+
+                    return buf.writeBytes(byteArray);
+                } catch (IOException e) {
+                    buf.release();
+                    throw new IllegalStateException("Unexpected IOException from ByteArrayInputStream", e);
+                }
+            });
+        }
+
+        @Override
+        public Mono<Void> publishText(ParameterWriter writer) {
+            return Mono.fromRunnable(() -> {
+                try {
+                    int size = value.available();
+                    byte[] byteArray = new byte[size];
+                    int readBytes = value.read(byteArray);
+
+                    // ✅ size == 0 이면 readBytes == -1 이어도 무시
+                    if (size != 0 && readBytes != size) {
+                        throw new IllegalStateException("Expected to read " + size + " bytes, but got " + readBytes);
+                    }
+
+                    writer.writeHex(byteArray);
+                } catch (IOException e) {
+                    throw new IllegalStateException("Unexpected IOException from ByteArrayInputStream", e);
+                }
+            });
+        }
+
+        @Override
+        public String toString() {
+            return value.toString();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (!(o instanceof ByteArrayInputStreamMysqlParameter)) {
+                return false;
+            }
+
+            ByteArrayInputStreamMysqlParameter that = (ByteArrayInputStreamMysqlParameter) o;
+            return value.equals(that.value);
+        }
+
+        @Override
+        public int hashCode() {
+            return value.hashCode();
+        }
+
+        @Override
+        public MySqlType getType() {
+            return MySqlType.VARBINARY;
+        }
+    }
+}

r2dbc-mysql/src/main/java/io/asyncer/r2dbc/mysql/codec/DefaultCodecs.java

@@ -81,7 +81,8 @@ final class DefaultCodecs implements Codecs {
         BlobCodec.INSTANCE,
 
         ByteBufferCodec.INSTANCE,
-        ByteArrayCodec.INSTANCE
+        ByteArrayCodec.INSTANCE,
+        ByteArrayInputStreamCodec.INSTANCE
     );
 
     private final List<Codec<?>> codecs;