| /** |
| * 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; |
| } |
| } |
| } |