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/*
 * Copyright 2014 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.auto;

import java.util.Optional;

import br.com.objectos.code.AccessInfo;
import br.com.objectos.code.Artifact;
import br.com.objectos.code.MethodInfo;
import br.com.objectos.code.SimpleTypePrimitives;
import br.com.objectos.code.TypeInfo;

/**
 * @author [email protected] (Patricia Nascimento)
 */
class IsPredicateCanvas {

  public static final IsPredicateCanvas INSTANCE = new IsPredicateCanvas();

  private IsPredicateCanvas() {
  }

  public static Optional toArtifact(TypeInfo typeInfo, MethodInfo methodInfo) {
    return INSTANCE.code(typeInfo, methodInfo);
  }

  private Optional code(TypeInfo typeInfo, MethodInfo methodInfo) {
    if (methodInfo.hasAccessInfo(AccessInfo.PRIVATE)) {
      return Optional.empty();
    }

    if (!methodInfo.hasReturnTypeInfo(SimpleTypePrimitives.BOOLEAN)) {
      return Optional.empty();
    }

    Artifact artifact = codeMethod(typeInfo, methodInfo);
    return Optional.of(artifact);
  }

  private Artifact codeMethod(TypeInfo typeInfo, MethodInfo methodInfo) {
    IsPredicate predicate = IsPredicate.wrap(typeInfo, methodInfo);
    return Artifact.of(predicate.get());
  }

}