content: /*
   * Copyright (C) 2020 ActiveJ 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.activej.serializer.def.impl;
  
  import io.activej.codegen.expression.Expression;
  import io.activej.common.annotation.ExposedInternals;
  import io.activej.serializer.CompatibilityLevel;
  import io.activej.serializer.def.SerializerDef;
  
  import java.util.Collections;
  import java.util.EnumSet;
  import java.util.HashSet;
  import java.util.Set;
  
  import static io.activej.codegen.expression.Expressions.*;
  import static io.activej.serializer.util.Utils.initialCapacity;
  
  @ExposedInternals
  public final class SetSerializerDef extends RegularCollectionSerializerDef {
  	public SetSerializerDef(SerializerDef valueSerializer, boolean nullable) {
  		super(valueSerializer, Set.class, Set.class, Object.class, nullable);
  	}
  
  	@Override
  	protected SerializerDef doEnsureNullable(CompatibilityLevel compatibilityLevel) {
  		return new SetSerializerDef(valueSerializer, true);
  	}
  
  	@Override
  	protected Expression doDecode(StaticDecoders staticDecoders, Expression in, int version, CompatibilityLevel compatibilityLevel, Expression length) {
  		Decoder decoder = valueSerializer.defineDecoder(staticDecoders, version, compatibilityLevel);
  		return ifEq(length, value(0),
  			staticCall(Collections.class, "emptySet"),
  			ifEq(length, value(1),
  				staticCall(Collections.class, "singleton", decoder.decode(in)),
  				super.doDecode(staticDecoders, in, version, compatibilityLevel, length)));
  	}
  
  	@Override
  	protected Expression createBuilder(Expression length) {
  		if (valueSerializer.getDecodeType().isEnum()) {
  			return staticCall(EnumSet.class, "noneOf", value(valueSerializer.getEncodeType()));
  		}
  		return constructor(HashSet.class, initialCapacity(length));
  	}
  }
  