content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.celeborn.reflect;
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.InvocationTargetException;
  import java.security.AccessController;
  import java.security.PrivilegedAction;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.Map;
  
  /** this class is copied from Apache Kyuubi, from derived parquet-common */
  public class DynConstructors {
  
    private DynConstructors() {}
  
    public static class Ctor<C> extends DynMethods.UnboundMethod {
      private final Constructor<C> ctor;
      private final Class<? extends C> constructed;
  
      private Ctor(Constructor<C> constructor, Class<? extends C> constructed) {
        super(null, "newInstance");
        this.ctor = constructor;
        this.constructed = constructed;
      }
  
      public Class<? extends C> getConstructedClass() {
        return constructed;
      }
  
      public C newInstanceChecked(Object... args) throws Exception {
        try {
          if (args.length > ctor.getParameterCount()) {
            return ctor.newInstance(Arrays.copyOfRange(args, 0, ctor.getParameterCount()));
          } else {
            return ctor.newInstance(args);
          }
        } catch (InstantiationException | IllegalAccessException e) {
          throw e;
        } catch (InvocationTargetException e) {
          if (e.getCause() instanceof Exception) {
            throw (Exception) e.getCause();
          }
          if (e.getCause() instanceof RuntimeException) {
            throw (RuntimeException) e.getCause();
          }
          throw new RuntimeException(e.getCause());
        }
      }
  
      public C newInstance(Object... args) {
        try {
          return newInstanceChecked(args);
        } catch (Exception e) {
          if (e instanceof RuntimeException) {
            throw (RuntimeException) e;
          }
          throw new RuntimeException(e);
        }
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <R> R invoke(Object target, Object... args) {
        if (target != null) {
          throw new IllegalArgumentException("Invalid call to constructor: target must be null");
        }
        return (R) newInstance(args);
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <R> R invokeChecked(Object target, Object... args) throws Exception {
        if (target != null) {
          throw new IllegalArgumentException("Invalid call to constructor: target must be null");
        }
        return (R) newInstanceChecked(args);
      }
  
      @Override
      public DynMethods.BoundMethod bind(Object receiver) {
        throw new IllegalStateException("Cannot bind constructors");
      }
  
      @Override
      public boolean isStatic() {
        return true;
      }
  
      @Override
      public String toString() {
        return getClass().getSimpleName() + "(constructor=" + ctor + ", class=" + constructed + ")";
      }
    }
  
    public static Builder builder() {
      return new Builder();
    }
  
    public static Builder builder(Class<?> baseClass) {
      return new Builder(baseClass);
    }
  
    @SuppressWarnings("rawtypes")
    public static class Builder {
      private final Class<?> baseClass;
      private ClassLoader loader = Thread.currentThread().getContextClassLoader();
  
      private Ctor ctor = null;
      private Map<String, Throwable> problems = new HashMap<>();
  
      public Builder(Class<?> baseClass) {
        this.baseClass = baseClass;
      }
  
      public Builder() {
        this.baseClass = null;
      }
  
      /**
       * Set the {@link ClassLoader} used to lookup classes by name.
       *
       * <p>If not set, the current thread's ClassLoader is used.
       *
       * @param newLoader a ClassLoader
       * @return this Builder for method chaining
       */
      public Builder loader(ClassLoader newLoader) {
        this.loader = newLoader;
        return this;
      }
  
      public Builder impl(String className, Class<?>... types) {
        // don't do any work if an implementation has been found
        if (ctor != null) {
          return this;
        }
  
        try {
          Class<?> targetClass = Class.forName(className, true, loader);
          impl(targetClass, types);
        } catch (NoClassDefFoundError | ClassNotFoundException e) {
          // cannot load this implementation
          problems.put(className, e);
        }
        return this;
      }
  
      public <T> Builder impl(Class<T> targetClass, Class<?>... types) {
        // don't do any work if an implementation has been found
        if (ctor != null) {
          return this;
        }
  
        try {
          ctor = new Ctor<T>(targetClass.getConstructor(types), targetClass);
        } catch (NoSuchMethodException e) {
          // not the right implementation
          problems.put(methodName(targetClass, types), e);
        }
        return this;
      }
  
      public Builder hiddenImpl(Class<?>... types) {
        hiddenImpl(baseClass, types);
        return this;
      }
  
      @SuppressWarnings("unchecked")
      public Builder hiddenImpl(String className, Class<?>... types) {
        // don't do any work if an implementation has been found
        if (ctor != null) {
          return this;
        }
  
        try {
          Class targetClass = Class.forName(className, true, loader);
          hiddenImpl(targetClass, types);
        } catch (NoClassDefFoundError | ClassNotFoundException e) {
          // cannot load this implementation
          problems.put(className, e);
        }
        return this;
      }
  
      public <T> Builder hiddenImpl(Class<T> targetClass, Class<?>... types) {
        // don't do any work if an implementation has been found
        if (ctor != null) {
          return this;
        }
  
        try {
          Constructor<T> hidden = targetClass.getDeclaredConstructor(types);
          AccessController.doPrivileged(new MakeAccessible(hidden));
          ctor = new Ctor<T>(hidden, targetClass);
        } catch (SecurityException e) {
          // unusable
          problems.put(methodName(targetClass, types), e);
        } catch (NoSuchMethodException e) {
          // not the right implementation
          problems.put(methodName(targetClass, types), e);
        }
        return this;
      }
  
      @SuppressWarnings("unchecked")
      public <C> Ctor<C> buildChecked() throws NoSuchMethodException {
        if (ctor != null) {
          return ctor;
        }
        throw buildCheckedException(baseClass, problems);
      }
  
      @SuppressWarnings("unchecked")
      public <C> Ctor<C> build() {
        if (ctor != null) {
          return ctor;
        }
        throw buildRuntimeException(baseClass, problems);
      }
    }
  
    private static class MakeAccessible implements PrivilegedAction<Void> {
      private final Constructor<?> hidden;
  
      MakeAccessible(Constructor<?> hidden) {
        this.hidden = hidden;
      }
  
      @Override
      public Void run() {
        hidden.setAccessible(true);
        return null;
      }
    }
  
    private static NoSuchMethodException buildCheckedException(
        Class<?> baseClass, Map<String, Throwable> problems) {
      NoSuchMethodException exc =
          new NoSuchMethodException(
              "Cannot find constructor for " + baseClass + "\n" + formatProblems(problems));
      problems.values().forEach(exc::addSuppressed);
      return exc;
    }
  
    private static RuntimeException buildRuntimeException(
        Class<?> baseClass, Map<String, Throwable> problems) {
      RuntimeException exc =
          new RuntimeException(
              "Cannot find constructor for " + baseClass + "\n" + formatProblems(problems));
      problems.values().forEach(exc::addSuppressed);
      return exc;
    }
  
    private static String formatProblems(Map<String, Throwable> problems) {
      StringBuilder sb = new StringBuilder();
      boolean first = true;
      for (Map.Entry<String, Throwable> problem : problems.entrySet()) {
        if (first) {
          first = false;
        } else {
          sb.append("\n");
        }
        sb.append("\tMissing ")
            .append(problem.getKey())
            .append(" [")
            .append(problem.getValue().getClass().getName())
            .append(": ")
            .append(problem.getValue().getMessage())
            .append("]");
      }
      return sb.toString();
    }
  
    private static String methodName(Class<?> targetClass, Class<?>... types) {
      StringBuilder sb = new StringBuilder();
      sb.append(targetClass.getName()).append("(");
      boolean first = true;
      for (Class<?> type : types) {
        if (first) {
          first = false;
        } else {
          sb.append(",");
        }
        sb.append(type.getName());
      }
      sb.append(")");
      return sb.toString();
    }
  }
  