| /* |
| * 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.internal; |
| |
| import java.io.InvalidObjectException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Type; |
| |
| import javax.management.openmbean.CompositeData; |
| import javax.management.openmbean.CompositeDataSupport; |
| import javax.management.openmbean.CompositeDataView; |
| import javax.management.openmbean.CompositeType; |
| import javax.management.openmbean.OpenDataException; |
| |
| /** |
| * Open type converter for Composite type |
| * |
| * |
| */ |
| |
| public class CompositeConverter extends OpenTypeConverter { |
| |
| private final String[] itemNames; |
| private final Method[] getters; |
| private final OpenTypeConverter[] getterConverters; |
| private CompositeBuilder compositeBuilder; |
| |
| CompositeConverter(Class targetClass, CompositeType compositeType, String[] itemNames, |
| Method[] getters) throws OpenDataException { |
| super(targetClass, compositeType, CompositeData.class); |
| |
| assert (itemNames.length == getters.length); |
| |
| this.itemNames = itemNames; |
| this.getters = getters; |
| this.getterConverters = new OpenTypeConverter[getters.length]; |
| for (int i = 0; i < getters.length; i++) { |
| Type retType = getters[i].getGenericReturnType(); |
| getterConverters[i] = OpenTypeConverter.toConverter(retType); |
| } |
| } |
| |
| /** |
| * Converts to open value |
| */ |
| @Override |
| Object toNonNullOpenValue(Object value) throws OpenDataException { |
| CompositeType ct = (CompositeType) getOpenType(); |
| if (value instanceof CompositeDataView) |
| return ((CompositeDataView) value).toCompositeData(ct); |
| if (value == null) |
| return null; |
| |
| Object[] values = new Object[getters.length]; |
| for (int i = 0; i < getters.length; i++) { |
| try { |
| Object got = getters[i].invoke(value, (Object[]) null); |
| values[i] = getterConverters[i].toOpenValue(got); |
| } catch (Exception e) { |
| throw openDataException("Error calling getter for " + itemNames[i] + ": " + e, e); |
| } |
| } |
| return new CompositeDataSupport(ct, itemNames, values); |
| } |
| |
| /** |
| * Determine how to convert back from the CompositeData into the original Java type. For a type |
| * that is not reconstructible, this method will fail every time, and will throw the right |
| * exception. |
| */ |
| private synchronized void makeCompositeBuilder() throws InvalidObjectException { |
| if (compositeBuilder != null) |
| return; |
| |
| Class targetClass = (Class<?>) getTargetType(); |
| |
| CompositeBuilder[][] builders = {{new CompositeBuilderViaFrom(targetClass, itemNames),}, |
| {new CompositeBuilderViaConstructor(targetClass, itemNames),}, |
| {new CompositeBuilderCheckGetters(targetClass, itemNames, getterConverters), |
| new CompositeBuilderViaSetters(targetClass, itemNames), |
| new CompositeBuilderViaProxy(targetClass, itemNames),},}; |
| CompositeBuilder foundBuilder = null; |
| |
| StringBuilder whyNots = new StringBuilder(); |
| Throwable possibleCause = null; |
| find: for (CompositeBuilder[] relatedBuilders : builders) { |
| for (int i = 0; i < relatedBuilders.length; i++) { |
| CompositeBuilder builder = relatedBuilders[i]; |
| String whyNot = builder.applicable(getters); |
| if (whyNot == null) { |
| foundBuilder = builder; |
| break find; |
| } |
| Throwable cause = builder.possibleCause(); |
| if (cause != null) |
| possibleCause = cause; |
| if (whyNot.length() > 0) { |
| if (whyNots.length() > 0) |
| whyNots.append("; "); |
| whyNots.append(whyNot); |
| if (i == 0) |
| break; |
| } |
| } |
| } |
| if (foundBuilder == null) { |
| String msg = "Do not know how to make a " + targetClass.getName() + " from a CompositeData: " |
| + whyNots; |
| if (possibleCause != null) |
| msg += ". Remaining exceptions show a POSSIBLE cause."; |
| throw invalidObjectException(msg, possibleCause); |
| } |
| compositeBuilder = foundBuilder; |
| } |
| |
| @Override |
| void checkReconstructible() throws InvalidObjectException { |
| makeCompositeBuilder(); |
| } |
| |
| @Override |
| public Object fromNonNullOpenValue(Object value) throws InvalidObjectException { |
| makeCompositeBuilder(); |
| return compositeBuilder.fromCompositeData((CompositeData) value, itemNames, getterConverters); |
| } |
| |
| } |