/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.module.extension.internal.runtime.execution;

import static org.mule.runtime.api.i18n.I18nMessageFactory.createStaticMessage;
import static org.mule.runtime.api.util.Preconditions.checkArgument;
import org.mule.runtime.api.exception.MuleRuntimeException;
import org.mule.runtime.api.meta.model.operation.OperationModel;
import org.mule.runtime.extension.api.runtime.operation.OperationExecutor;
import org.mule.runtime.extension.api.runtime.operation.OperationExecutorFactory;
import org.mule.runtime.module.extension.internal.runtime.operation.ReflectiveMethodOperationExecutor;

import java.lang.reflect.Method;

/**
 * An implementation of {@link OperationExecutorFactory} which produces instances of {@link ReflectiveMethodOperationExecutor}.
 *
 * @param <T> the type of the class in which the implementing method is declared
 * @since 3.7.0
 */
public final class ReflectiveOperationExecutorFactory<T> implements OperationExecutorFactory {

  private final Class<T> implementationClass;
  private final Method operationMethod;

  public ReflectiveOperationExecutorFactory(Class<T> implementationClass, Method operationMethod) {
    checkArgument(implementationClass != null, "implementationClass cannot be null");
    checkArgument(operationMethod != null, "operationMethod cannot be null");

    this.implementationClass = implementationClass;
    this.operationMethod = operationMethod;

  }

  @Override
  public OperationExecutor createExecutor(OperationModel operationModel) {
    Object delegate;
    try {
      delegate = implementationClass.newInstance();
    } catch (Exception e) {
      throw new MuleRuntimeException(createStaticMessage("Could not create instance of operation class "
          + implementationClass.getName()), e);
    }

    return new ReflectiveMethodOperationExecutor(operationModel, operationMethod, delegate);
  }
}