/*
* Copyright (C) 2015 SoftIndex LLC.
*
* 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
*
* 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 io.datakernel.serializer.asm;
import io.datakernel.bytebuf.SerializationUtils;
import io.datakernel.codegen.Expression;
import io.datakernel.codegen.ForVar;
import io.datakernel.codegen.Variable;
import io.datakernel.codegen.utils.Preconditions;
import io.datakernel.serializer.CompatibilityLevel;
import io.datakernel.serializer.NullableOptimization;
import io.datakernel.serializer.SerializerBuilder;
import java.util.*;
import static io.datakernel.codegen.Expressions.*;
public class SerializerGenSet implements SerializerGen, NullableOptimization {
private final SerializerGen valueSerializer;
private final boolean nullable;
public SerializerGenSet(SerializerGen valueSerializer) {
this.valueSerializer = valueSerializer;
this.nullable = false;
}
public SerializerGenSet(SerializerGen valueSerializer, boolean nullable) {
this.valueSerializer = valueSerializer;
this.nullable = nullable;
}
@Override
public void getVersions(VersionsCollector versions) {
versions.addRecursive(valueSerializer);
}
@Override
public boolean isInline() {
return true;
}
@Override
public Class<?> getRawType() {
return Set.class;
}
@Override
public void prepareSerializeStaticMethods(int version, SerializerBuilder.StaticMethods staticMethods, CompatibilityLevel compatibilityLevel) {
valueSerializer.prepareSerializeStaticMethods(version, staticMethods, compatibilityLevel);
}
@Override
public Expression serialize(Expression byteArray, final Variable off, Expression value, final int version, final SerializerBuilder.StaticMethods staticMethods, final CompatibilityLevel compatibilityLevel) {
Expression serializeEach = forEach(value, valueSerializer.getRawType(), new ForVar() {
@Override
public Expression forVar(Expression it) {
return set(off, valueSerializer.serialize(arg(0), arg(1), it, version, staticMethods, compatibilityLevel));
}
});
if (!nullable) {
return sequence(
set(off, callStatic(SerializationUtils.class, "writeVarInt", byteArray, off, call(value, "size"))),
serializeEach, off);
} else {
return ifThenElse(isNull(value),
sequence(set(off, callStatic(SerializationUtils.class, "writeVarInt", byteArray, off, value(0))), off),
sequence(set(off, callStatic(SerializationUtils.class, "writeVarInt", byteArray, off, inc(call(value, "size")))),
serializeEach, off));
}
}
@Override
public void prepareDeserializeStaticMethods(int version, SerializerBuilder.StaticMethods staticMethods, CompatibilityLevel compatibilityLevel) {
valueSerializer.prepareDeserializeStaticMethods(version, staticMethods, compatibilityLevel);
}
@Override
public Expression deserialize(Class<?> targetType, int version, SerializerBuilder.StaticMethods staticMethods, CompatibilityLevel compatibilityLevel) {
boolean isEnum = valueSerializer.getRawType().isEnum();
Class<?> targetInstance = isEnum ? EnumSet.class : LinkedHashSet.class;
Preconditions.check(targetType.isAssignableFrom(targetInstance));
if (!isEnum) {
return deserializeSimpleSet(version, staticMethods, compatibilityLevel);
} else {
return deserializeEnumSet(version, staticMethods, compatibilityLevel);
}
}
private Expression deserializeEnumSet(final int version,
final SerializerBuilder.StaticMethods staticMethods,
final CompatibilityLevel compatibilityLevel) {
Expression len = let(call(arg(0), "readVarInt"));
final Expression container = let(newArray(Object[].class, (!nullable ? len : dec(len))));
Expression array = expressionFor((!nullable ? len : dec(len)), new ForVar() {
@Override
public Expression forVar(Expression it) {
return setArrayItem(container, it, valueSerializer.deserialize(valueSerializer.getRawType(), version, staticMethods, compatibilityLevel));
}
});
Expression list = let(cast(callStatic(Arrays.class, "asList", container), Collection.class));
Expression enumSet = callStatic(EnumSet.class, "copyOf", list);
if (!nullable) {
return sequence(len, container, array, list, enumSet);
} else {
return ifThenElse(cmpEq(len, value(0)),
nullRef(EnumSet.class),
sequence(container, array, list, enumSet));
}
}
private Expression deserializeSimpleSet(final int version,
final SerializerBuilder.StaticMethods staticMethods,
final CompatibilityLevel compatibilityLevel) {
Expression length = let(call(arg(0), "readVarInt"));
final Expression container = let(constructor(LinkedHashSet.class, (!nullable ? length : dec(length))));
Expression deserializeEach = expressionFor((!nullable ? length : dec(length)), new ForVar() {
@Override
public Expression forVar(Expression it) {
return sequence(
call(container, "add", cast(valueSerializer.deserialize(valueSerializer.getRawType(), version, staticMethods, compatibilityLevel), Object.class)),
voidExp()
);
}
});
if (!nullable) {
return sequence(length, container, deserializeEach, container);
} else {
return ifThenElse(cmpEq(length, value(0)),
nullRef(LinkedHashSet.class),
sequence(container, deserializeEach, container)
);
}
}
@Override
public SerializerGen setNullable() {
return new SerializerGenSet(valueSerializer, true);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
SerializerGenSet that = (SerializerGenSet) o;
if (nullable != that.nullable) return false;
return !(valueSerializer != null ? !valueSerializer.equals(that.valueSerializer) : that.valueSerializer != null);
}
@Override
public int hashCode() {
int result = valueSerializer != null ? valueSerializer.hashCode() : 0;
result = 31 * result + (nullable ? 1 : 0);
return result;
}
}