/**
* 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.
*/
package org.apache.avro.reflect;
import java.io.IOException;
import java.lang.reflect.Field;
import org.apache.avro.AvroRuntimeException;
import org.apache.avro.io.Decoder;
import org.apache.avro.io.Encoder;
import sun.misc.Unsafe;
@SuppressWarnings("restriction")
class FieldAccessUnsafe extends FieldAccess {
private static final Unsafe UNSAFE;
static {
try {
Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
theUnsafe.setAccessible(true);
UNSAFE = (Unsafe) theUnsafe.get(null);
// It seems not all Unsafe implementations implement the following method.
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
protected FieldAccessor getAccessor(Field field) {
AvroEncode enc = field.getAnnotation(AvroEncode.class);
if (enc != null)
try {
return new UnsafeCustomEncodedField(field, enc.using().newInstance() );
} catch (Exception e) {
throw new AvroRuntimeException("Could not instantiate custom Encoding");
}
Class<?> c = field.getType();
if (c == int.class)
return new UnsafeIntField(field);
else if (c == long.class)
return new UnsafeLongField(field);
else if (c == byte.class)
return new UnsafeByteField(field);
else if (c == float.class)
return new UnsafeFloatField(field);
else if (c == double.class)
return new UnsafeDoubleField(field);
else if (c == char.class)
return new UnsafeCharField(field);
else if (c == boolean.class)
return new UnsafeBooleanField(field);
else if (c == short.class)
return new UnsafeShortField(field);
else
return new UnsafeObjectField(field);
}
abstract static class UnsafeCachedField extends FieldAccessor {
protected final long offset;
protected Field field;
protected final boolean isStringable;
UnsafeCachedField(Field f) {
this.offset = UNSAFE.objectFieldOffset(f);
this.field = f;
this.isStringable = f.isAnnotationPresent(Stringable.class);
}
@Override
protected Field getField() {
return field;
}
@Override
protected boolean supportsIO() {
return true;
}
@Override
protected boolean isStringable() {
return isStringable;
}
}
final static class UnsafeIntField extends UnsafeCachedField {
UnsafeIntField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putInt(object, offset, (Integer) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getInt(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putInt(object, offset, in.readInt());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeInt(UNSAFE.getInt(object, offset));
}
}
final static class UnsafeFloatField extends UnsafeCachedField {
protected UnsafeFloatField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putFloat(object, offset, (Float) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getFloat(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putFloat(object, offset, in.readFloat());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeFloat(UNSAFE.getFloat(object, offset));
}
}
final static class UnsafeShortField extends UnsafeCachedField {
protected UnsafeShortField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putShort(object, offset, (Short) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getShort(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putShort(object, offset, (short) in.readInt());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeInt(UNSAFE.getShort(object, offset));
}
}
final static class UnsafeByteField extends UnsafeCachedField {
protected UnsafeByteField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putByte(object, offset, (Byte) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getByte(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putByte(object, offset, (byte) in.readInt());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeInt(UNSAFE.getByte(object, offset));
}
}
final static class UnsafeBooleanField extends UnsafeCachedField {
protected UnsafeBooleanField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putBoolean(object, offset, (Boolean) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getBoolean(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putBoolean(object, offset, in.readBoolean());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeBoolean(UNSAFE.getBoolean(object, offset));
}
}
final static class UnsafeCharField extends UnsafeCachedField {
protected UnsafeCharField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putChar(object, offset, (Character) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getChar(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putChar(object, offset, (char) in.readInt());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeInt(UNSAFE.getChar(object, offset));
}
}
final static class UnsafeLongField extends UnsafeCachedField {
protected UnsafeLongField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putLong(object, offset, (Long) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getLong(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putLong(object, offset, in.readLong());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeLong(UNSAFE.getLong(object, offset));
}
}
final static class UnsafeDoubleField extends UnsafeCachedField {
protected UnsafeDoubleField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putDouble(object, offset, (Double) value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getDouble(object, offset);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putDouble(object, offset, in.readDouble());
}
@Override
protected void write(Object object, Encoder out) throws IOException {
out.writeDouble(UNSAFE.getDouble(object, offset));
}
}
final static class UnsafeObjectField extends UnsafeCachedField {
protected UnsafeObjectField(Field f) {
super(f);
}
@Override
protected void set(Object object, Object value) {
UNSAFE.putObject(object, offset, value);
}
@Override
protected Object get(Object object) {
return UNSAFE.getObject(object, offset);
}
@Override
protected boolean supportsIO() {
return false;
}
}
final static class UnsafeCustomEncodedField extends UnsafeCachedField {
private CustomEncoding<?> encoding;
UnsafeCustomEncodedField(Field f, CustomEncoding<?> encoding) {
super(f);
this.encoding = encoding;
}
@Override
protected Object get(Object object) throws IllegalAccessException {
return UNSAFE.getObject(object, offset);
}
@Override
protected void set(Object object, Object value) throws IllegalAccessException, IOException {
UNSAFE.putObject(object, offset, value);
}
@Override
protected void read(Object object, Decoder in) throws IOException {
UNSAFE.putObject(object, offset, encoding.read(in));
}
@Override
protected void write(Object object, Encoder out) throws IOException {
encoding.write(UNSAFE.getObject(object, offset), out);
}
protected boolean isCustomEncoded() {
return true;
}
}
}