| /* |
| * 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.commons.jexl3.internal.introspection; |
| import java.util.Map; |
| |
| /** |
| * Specialized executor to set a property in a Map. |
| * @since 2.0 |
| */ |
| public final class MapSetExecutor extends AbstractExecutor.Set { |
| /** The java.util.map.put method used as an active marker in MapSet. */ |
| private static final java.lang.reflect.Method MAP_SET = initMarker(Map.class, "put", Object.class, Object.class); |
| /** The property. */ |
| private final Object property; |
| /** The property value class. */ |
| private final Class<?> valueClass; |
| |
| /** |
| * Attempts to discover a MapSetExecutor. |
| * |
| * @param is the introspector |
| * @param clazz the class to find the set method from |
| * @param identifier the key to use as an argument to the get method |
| * @param value the value to use as argument in map.put(key,value) |
| * @return the executor if found, null otherwise |
| */ |
| public static MapSetExecutor discover(final Introspector is, final Class<?> clazz, final Object identifier, final Object value) { |
| if (Map.class.isAssignableFrom(clazz)) { |
| return new MapSetExecutor(clazz, MAP_SET, identifier, value); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Creates an instance. |
| * @param clazz the class the set method applies to |
| * @param method the method called through this executor |
| * @param key the key to use as 1st argument to the set method |
| * @param value the value to use as 2nd argument to the set method |
| */ |
| private MapSetExecutor(final Class<?> clazz, final java.lang.reflect.Method method, final Object key, final Object value) { |
| super(clazz, method); |
| property = key; |
| valueClass = classOf(value); |
| } |
| |
| @Override |
| public Object getTargetProperty() { |
| return property; |
| } |
| |
| @Override |
| public Object invoke(final Object obj, final Object value) { |
| @SuppressWarnings("unchecked") // ctor only allows Map instances - see discover() method |
| final Map<Object,Object> map = ((Map<Object, Object>) obj); |
| map.put(property, value); |
| return value; |
| } |
| |
| @Override |
| public Object tryInvoke(final Object obj, final Object key, final Object value) { |
| if (obj != null |
| && method != null |
| && objectClass.equals(obj.getClass()) |
| && ((property == null && key == null) |
| || (property != null && key != null && property.getClass().equals(key.getClass()))) |
| && valueClass.equals(classOf(value))) { |
| @SuppressWarnings("unchecked") // ctor only allows Map instances - see discover() method |
| final Map<Object,Object> map = ((Map<Object, Object>) obj); |
| map.put(key, value); |
| return value; |
| } |
| return TRY_FAILED; |
| } |
| } |