solr/core/src/java/org/apache/solr/core/SolrClassLoader.java

/*
 * 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.solr.core;

import java.io.Closeable;

import org.apache.lucene.analysis.util.ResourceLoader;

/**
 * A generic interface to load classes and resources. This helps us to avoid using {@link SolrResourceLoader} directly
 *
 */
public interface SolrClassLoader extends Closeable, ResourceLoader {

  <T> T newInstance(String cname, Class<T> expectedType, String... subpackages);

  default <T> T newInstance(PluginInfo info, Class<T> expectedType) {
   return newInstance(info.className, expectedType);
  }

  <T> T newInstance(String cName, Class<T> expectedType, String[] subPackages, Class[] params, Object[] args);

  <T> Class<? extends T> findClass(String cname, Class<T> expectedType);

  default  <T> Class<? extends T> findClass(PluginInfo info, Class<T> expectedType){
    return findClass(info.className, expectedType);
  }
}