| /* |
| * 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.geode.management.configuration; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.util.Objects; |
| import java.util.Properties; |
| import java.util.regex.Pattern; |
| |
| import com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import org.apache.commons.lang3.StringUtils; |
| |
| import org.apache.geode.util.internal.GeodeJsonMapper; |
| |
| /** |
| * Used to configure an attribute that represents an instance of a java class. |
| * If the class implements {@link org.apache.geode.cache.Declarable} then |
| * properties can also be configured that will be used to initialize the instance. |
| */ |
| public class ClassName implements Serializable { |
| private static final long serialVersionUID = 1L; |
| |
| private String className; |
| private Properties initProperties; |
| private static ObjectMapper mapper = GeodeJsonMapper.getMapper(); |
| |
| /** |
| * Can be used when updating an attribute to configure |
| * it with no class name. |
| */ |
| public static final ClassName EMPTY = new ClassName(""); |
| |
| /** |
| * Object to be instantiated using the empty param constructor of the className |
| * |
| * @param className this class needs a no-arg constructor. |
| */ |
| public ClassName(String className) { |
| this(className, "{}"); |
| } |
| |
| /** |
| * this is a convenient way to create a ClassName object using json represented properties |
| * |
| * @param className this class needs to have a no-arg constructor |
| * @param jsonInitProperties a json representation of the initialization properties |
| * that will be passed to {@link org.apache.geode.cache.Declarable#initialize}. |
| * If the className is not Declarable, then these properties will be ignored |
| * @throws IllegalArgumentException if the class name is not valid |
| * @throws IllegalArgumentException if jsonInitProperties is invalid JSON |
| */ |
| public ClassName(String className, String jsonInitProperties) { |
| this(className, createProperties(jsonInitProperties)); |
| } |
| |
| private static Properties createProperties(String jsonInitProperties) { |
| if (StringUtils.isBlank(jsonInitProperties)) { |
| return new Properties(); |
| } |
| try { |
| return mapper.readValue(jsonInitProperties, Properties.class); |
| } catch (IOException e) { |
| throw new IllegalArgumentException("Invalid JSON: " + jsonInitProperties, e); |
| } |
| } |
| |
| /** |
| * @param className the name of the class to be instantiated. This class needs to have |
| * a no-arg constructor. |
| * @param properties the initialization properties |
| * that will be passed to {@link org.apache.geode.cache.Declarable#initialize}. |
| * If the className is not Declarable, then these properties will be ignored |
| * |
| * @throws IllegalArgumentException if classname contains illegal classname characters |
| */ |
| @JsonCreator |
| public ClassName(@JsonProperty("className") String className, |
| @JsonProperty("initProperties") Properties properties) { |
| if (StringUtils.isBlank(className)) { |
| this.className = ""; |
| this.initProperties = new Properties(); |
| return; |
| } |
| // validate the className |
| if (!isClassNameValid(className)) { |
| throw new IllegalArgumentException("Invalid className"); |
| } |
| this.className = className; |
| this.initProperties = properties == null ? new Properties() : properties; |
| } |
| |
| /** |
| * @return the name of the class |
| */ |
| public String getClassName() { |
| return className; |
| } |
| |
| /** |
| * @return the properties that will be used when an instance is created. |
| */ |
| public Properties getInitProperties() { |
| return initProperties; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(className, initProperties); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == null) { |
| return false; |
| } |
| |
| if (!(o instanceof ClassName)) { |
| return false; |
| } |
| |
| ClassName that = (ClassName) o; |
| |
| return this.className.equals(that.getClassName()) |
| && this.getInitProperties().equals(that.getInitProperties()); |
| } |
| |
| /** |
| * this provides a convenient method to validate if the given name is a valid classname |
| * |
| * @return false if classname is blank or has invalid classname characters |
| */ |
| public static boolean isClassNameValid(String className) { |
| if (StringUtils.isBlank(className)) { |
| return false; |
| } |
| String regex = "([\\p{L}_$][\\p{L}\\p{N}_$]*\\.)*[\\p{L}_$][\\p{L}\\p{N}_$]*"; |
| return Pattern.matches(regex, className); |
| } |
| |
| } |