/**
* 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.gora.cassandra.serializers;
import java.nio.ByteBuffer;
import me.prettyprint.cassandra.serializers.BytesArraySerializer;
import me.prettyprint.cassandra.serializers.ByteBufferSerializer;
import me.prettyprint.cassandra.serializers.BooleanSerializer;
import me.prettyprint.cassandra.serializers.DoubleSerializer;
import me.prettyprint.cassandra.serializers.FloatSerializer;
import me.prettyprint.cassandra.serializers.IntegerSerializer;
import me.prettyprint.cassandra.serializers.LongSerializer;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.serializers.SerializerTypeInferer;
import me.prettyprint.hector.api.Serializer;
import org.apache.avro.Schema;
import org.apache.avro.Schema.Type;
import org.apache.avro.generic.GenericArray;
import org.apache.avro.specific.SpecificFixed;
import org.apache.avro.util.Utf8;
import org.apache.gora.persistency.StatefulHashMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Utility class that infers the concrete Serializer needed to turn a value into
* its binary representation
*/
public class GoraSerializerTypeInferer {
public static final Logger LOG = LoggerFactory.getLogger(GoraSerializerTypeInferer.class);
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Object value) {
Serializer serializer = null;
if (value == null) {
serializer = ByteBufferSerializer.get();
} else if (value instanceof Utf8) {
serializer = Utf8Serializer.get();
} else if (value instanceof Boolean) {
serializer = BooleanSerializer.get();
} else if (value instanceof ByteBuffer) {
serializer = ByteBufferSerializer.get();
} else if (value instanceof byte[]) {
serializer = BytesArraySerializer.get();
} else if (value instanceof Double) {
serializer = DoubleSerializer.get();
} else if (value instanceof Float) {
serializer = FloatSerializer.get();
} else if (value instanceof Integer) {
serializer = IntegerSerializer.get();
} else if (value instanceof Long) {
serializer = LongSerializer.get();
} else if (value instanceof String) {
serializer = StringSerializer.get();
} else if (value instanceof SpecificFixed) {
serializer = SpecificFixedSerializer.get(value.getClass());
} else if (value instanceof GenericArray) {
Schema schema = ((GenericArray)value).getSchema();
if (schema.getType() == Type.ARRAY) {
schema = schema.getElementType();
}
serializer = GenericArraySerializer.get(schema);
} else if (value instanceof StatefulHashMap) {
StatefulHashMap map = (StatefulHashMap)value;
if (map.size() == 0) {
serializer = ByteBufferSerializer.get();
}
else {
Object value0 = map.values().iterator().next();
Schema schema = TypeUtils.getSchema(value0);
serializer = StatefulHashMapSerializer.get(schema);
}
} else {
serializer = SerializerTypeInferer.getSerializer(value);
}
return serializer;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Class<?> valueClass) {
Serializer serializer = null;
if (valueClass.equals(Utf8.class)) {
serializer = Utf8Serializer.get();
} else if (valueClass.equals(Boolean.class) || valueClass.equals(boolean.class)) {
serializer = BooleanSerializer.get();
} else if (valueClass.equals(ByteBuffer.class)) {
serializer = ByteBufferSerializer.get();
} else if (valueClass.equals(Double.class) || valueClass.equals(double.class)) {
serializer = DoubleSerializer.get();
} else if (valueClass.equals(Float.class) || valueClass.equals(float.class)) {
serializer = FloatSerializer.get();
} else if (valueClass.equals(Integer.class) || valueClass.equals(int.class)) {
serializer = IntegerSerializer.get();
} else if (valueClass.equals(Long.class) || valueClass.equals(long.class)) {
serializer = LongSerializer.get();
} else if (valueClass.equals(String.class)) {
serializer = StringSerializer.get();
} else {
serializer = SerializerTypeInferer.getSerializer(valueClass);
}
return serializer;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Schema schema) {
Serializer serializer = null;
Type type = schema.getType();
if (type == Type.STRING) {
serializer = Utf8Serializer.get();
} else if (type == Type.BOOLEAN) {
serializer = BooleanSerializer.get();
} else if (type == Type.BYTES) {
serializer = ByteBufferSerializer.get();
} else if (type == Type.DOUBLE) {
serializer = DoubleSerializer.get();
} else if (type == Type.FLOAT) {
serializer = FloatSerializer.get();
} else if (type == Type.INT) {
serializer = IntegerSerializer.get();
} else if (type == Type.LONG) {
serializer = LongSerializer.get();
} else if (type == Type.FIXED) {
Class clazz = TypeUtils.getClass(schema);
serializer = SpecificFixedSerializer.get(clazz);
// serializer = SpecificFixedSerializer.get(schema);
} else if (type == Type.ARRAY) {
serializer = GenericArraySerializer.get(schema.getElementType());
} else if (type == Type.MAP) {
serializer = StatefulHashMapSerializer.get(schema.getValueType());
} else {
serializer = null;
}
return serializer;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Type type) {
Serializer serializer = null;
if (type == Type.STRING) {
serializer = Utf8Serializer.get();
} else if (type == Type.BOOLEAN) {
serializer = BooleanSerializer.get();
} else if (type == Type.BYTES) {
serializer = ByteBufferSerializer.get();
} else if (type == Type.DOUBLE) {
serializer = DoubleSerializer.get();
} else if (type == Type.FLOAT) {
serializer = FloatSerializer.get();
} else if (type == Type.INT) {
serializer = IntegerSerializer.get();
} else if (type == Type.LONG) {
serializer = LongSerializer.get();
} else if (type == Type.FIXED) {
serializer = SpecificFixedSerializer.get();
} else {
serializer = null;
}
return serializer;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Type type, Type elementType) {
Serializer serializer = null;
if (type == null) {
if (elementType == null) {
serializer = null;
} else {
serializer = getSerializer(elementType);
}
} else {
if (elementType == null) {
serializer = getSerializer(type);
}
}
if (type == Type.ARRAY) {
serializer = GenericArraySerializer.get(elementType);
} else if (type == Type.MAP) {
serializer = StatefulHashMapSerializer.get(elementType);
} else {
serializer = null;
}
return serializer;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static <T> Serializer<T> getSerializer(Type type, Class<T> clazz) {
Serializer serializer = null;
if (type != Type.FIXED) {
serializer = null;
}
if (clazz == null) {
serializer = null;
} else {
serializer = SpecificFixedSerializer.get(clazz);
}
return serializer;
}
}