| /* |
| * 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 javax.el; |
| |
| public abstract class MethodExpression extends Expression { |
| |
| private static final long serialVersionUID = 8163925562047324656L; |
| |
| /** |
| * @param context The EL context for this evaluation |
| * |
| * @return Information about the method that this expression resolves to |
| * |
| * @throws NullPointerException |
| * If the supplied context is <code>null</code> |
| * @throws PropertyNotFoundException |
| * If a property/variable resolution failed because no match |
| * was found or a match was found but was not readable |
| * @throws MethodNotFoundException |
| * If no matching method can be found |
| * @throws ELException |
| * Wraps any exception throw whilst resolving the property |
| */ |
| public abstract MethodInfo getMethodInfo(ELContext context); |
| |
| /** |
| * @param context The EL context for this evaluation |
| * @param params The parameters with which to invoke this method expression |
| * |
| * @return The result of invoking this method expression |
| * |
| * @throws NullPointerException |
| * If the supplied context is <code>null</code> |
| * @throws PropertyNotFoundException |
| * If a property/variable resolution failed because no match |
| * was found or a match was found but was not readable |
| * @throws MethodNotFoundException |
| * If no matching method can be found |
| * @throws ELException |
| * Wraps any exception throw whilst resolving the property or |
| * coercion of the result to the expected return type fails |
| */ |
| public abstract Object invoke(ELContext context, Object[] params); |
| |
| /** |
| * @return This default implementation always returns <code>false</code> |
| * @since EL 3.0 |
| */ |
| public boolean isParametersProvided() { |
| // Expected to be over-ridden by implementation |
| return false; |
| } |
| |
| /** |
| * @since EL 2.2 |
| * |
| * Note: The spelling mistake is deliberate. |
| * isParmetersProvided() - Specification definition |
| * isParametersProvided() - Corrected spelling |
| * |
| * @return Always <code>false</code> |
| * |
| * @deprecated Use {@link #isParametersProvided()} |
| */ |
| @Deprecated |
| public boolean isParmetersProvided() { |
| // Expected to be over-ridden by implementation |
| return false; |
| } |
| } |