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.jmx;
  
  import java.lang.reflect.Array;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.ArrayList;
  import java.util.List;
  
  public final class ValueFetcherFromGetterArrayAdapter implements ValueFetcher {
  	private final Method getter;
  
  	public ValueFetcherFromGetterArrayAdapter(Method getter) {
  		this.getter = getter;
  	}
  
  	@Override
  	public Object fetchFrom(Object source) {
  		try {
  			Object arr = getter.invoke(source);
  			if (arr.getClass().getComponentType().isPrimitive()) {
  				return wrapPrimitives(arr);
  			}
  			return List.of((Object[]) arr);
  		} catch (IllegalAccessException | InvocationTargetException e) {
  			throw new RuntimeException(e);
  		}
  	}
  
  	private List<Object> wrapPrimitives(Object arr) {
  		int length = Array.getLength(arr);
  		if (length == 0) {
  			return List.of();
  		}
  
  		List<Object> wrappers = new ArrayList<>(length);
  		for (int i = 0; i < length; i++) {
  			wrappers.add(Array.get(arr, i));
  		}
  		return wrappers;
  	}
  }
  