content: /*
   * 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.airlift.bytecode.expression;
  
  import com.google.common.collect.ImmutableList;
  import io.airlift.bytecode.BytecodeBlock;
  import io.airlift.bytecode.BytecodeNode;
  import io.airlift.bytecode.MethodGenerationContext;
  import io.airlift.bytecode.instruction.LabelNode;
  
  import java.util.List;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static io.airlift.bytecode.ParameterizedType.type;
  
  class NotBytecodeExpression
          extends BytecodeExpression
  {
      private final BytecodeExpression value;
  
      NotBytecodeExpression(BytecodeExpression value)
      {
          super(type(boolean.class));
          this.value = value;
          checkArgument(value.getType().getPrimitiveType() == boolean.class, "Expected value to be type boolean but is %s", value.getType());
      }
  
      @Override
      public BytecodeNode getBytecode(MethodGenerationContext generationContext)
      {
          LabelNode trueLabel = new LabelNode("true");
          LabelNode endLabel = new LabelNode("end");
          return new BytecodeBlock()
                  .append(value)
                  .ifTrueGoto(trueLabel)
                  .push(true)
                  .gotoLabel(endLabel)
                  .visitLabel(trueLabel)
                  .push(false)
                  .visitLabel(endLabel);
      }
  
      @Override
      public List<BytecodeNode> getChildNodes()
      {
          return ImmutableList.of(value);
      }
  
      @Override
      protected String formatOneLine()
      {
          return "(!" + value + ")";
      }
  }
  