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    • io.kubernetes.client.fluent.Visitor Maven / Gradle / Ivy

    /*
Copyright 2022 The Kubernetes Authors.
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.kubernetes.client.fluent;

import java.lang.reflect.Method;
import java.util.List;
import java.util.function.Predicate;

@FunctionalInterface
public interface Visitor {
  default Class getType() {
    List args = Visitors.getTypeArguments(Visitor.class, getClass());
    if (args == null || args.isEmpty()) {
      return null;
    }
    return (Class) args.get(0);
  }

  void visit(T element);

  default int order() {
    return 0;
  }

  default void visit(List path, T element) {
    visit(element);
  }

  default  Boolean canVisit(java.util.List path, F target) {
    if (target == null) {
      return false;
    }

    if (getType() == null) {
      return hasVisitMethodMatching(target);
    } else if (!getType().isAssignableFrom(target.getClass())) {
      return false;
    }

    try {
      return getRequirement().test(path);
    } catch (ClassCastException e) {
      // This will happen if predicte does not match the Object.
      // So, instead of using reflection to determine that, let's just catch the error
      return false;
    }
  }

  default  java.lang.Boolean hasVisitMethodMatching(F target) {
    for (Method method : getClass().getMethods()) {
      if (!method.getName().equals("visit") || method.getParameterTypes().length != 1) {
        continue;
      }
      Class visitorType = method.getParameterTypes()[0];
      if (visitorType.isAssignableFrom(target.getClass())) {
        return true;
      } else {
        return false;
      }
    }
    return false;
  }

  default  Predicate> getRequirement() {
    return p -> true;
  }

  default  java.util.function.Predicate> hasItem(
      java.lang.Class type, java.util.function.Predicate predicate) {
    Predicate> result =
        l -> l.stream().filter(i -> type.isInstance(i)).map(i -> type.cast(i)).anyMatch(predicate);
    return result;
  }

  default 
     Visitor addRequirement(
      java.lang.Class
     type, java.util.function.Predicate
     predicate) {
    return addRequirement(predicate);
  }

  default io.kubernetes.client.fluent.Visitor addRequirement(
      java.util.function.Predicate predicate) {
    return new DelegatingVisitor(getType(), this) {
      @Override
      public Predicate> getRequirement() {
        return Visitor.this.getRequirement().and(predicate);
      }
    };
  }
}
    
    
    
    

    




    
    
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