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.codegen.expression.Variable;
  import io.activej.common.annotation.ExposedInternals;
  import io.activej.serializer.CompatibilityLevel;
  import io.activej.serializer.def.PrimitiveSerializerDef;
  import io.activej.serializer.def.SerializerDef;
  import io.activej.serializer.def.SerializerDefWithNullable;
  import io.activej.serializer.def.SerializerDefs;
  
  import static io.activej.codegen.expression.Expressions.*;
  import static io.activej.serializer.CompatibilityLevel.LEVEL_4;
  import static io.activej.serializer.def.SerializerExpressions.readByte;
  import static io.activej.serializer.def.SerializerExpressions.writeByte;
  
  @ExposedInternals
  public final class BooleanSerializerDef extends PrimitiveSerializerDef implements SerializerDefWithNullable {
  	public static final byte NULLABLE_NULL = 0b00;
  	public static final byte NULLABLE_FALSE = 0b10;
  	public static final byte NULLABLE_TRUE = 0b11;
  
  	public final boolean nullable;
  
  	@SuppressWarnings("unused") // used via reflection
  	public BooleanSerializerDef() {
  		this(true, false);
  	}
  
  	public BooleanSerializerDef(boolean wrapped, boolean nullable) {
  		super(boolean.class, wrapped);
  		if (nullable && !wrapped) throw new IllegalArgumentException("'boolean' primitive type cannot be nullable");
  		this.nullable = nullable;
  	}
  
  	@Override
  	public SerializerDef ensureWrapped() {
  		return new BooleanSerializerDef(true, nullable);
  	}
  
  	@Override
  	protected boolean castToPrimitive() {
  		return !nullable;
  	}
  
  	@Override
  	protected Expression doSerialize(Expression byteArray, Variable off, Expression value, CompatibilityLevel compatibilityLevel) {
  		return !nullable ?
  			writeByte(byteArray, off, value) :
  			ifNull(value,
  				writeByte(byteArray, off, value(NULLABLE_NULL)),
  				writeByte(byteArray, off, bitOr(cast(call(value, "booleanValue"), byte.class), value(0b10))));
  	}
  
  	@Override
  	protected Expression doDeserialize(Expression in, CompatibilityLevel compatibilityLevel) {
  		return let(readByte(in), aByte ->
  			!nullable ?
  				cast(aByte, boolean.class) :
  				ifEq(aByte, value(NULLABLE_NULL),
  					nullRef(Boolean.class),
  					cast(bitAnd(aByte, value(1)), Boolean.class)
  				));
  	}
  
  	@Override
  	public SerializerDef ensureNullable(CompatibilityLevel compatibilityLevel) {
  		if (compatibilityLevel.getLevel() < LEVEL_4.getLevel()) {
  			return SerializerDefs.ofNullable(this);
  		}
  		return new BooleanSerializerDef(wrapped, true);
  	}
  }
  