/* * Copyright 2002-2018 the original author or authors. * * Licensed 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.springframework.expression.spel.support; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.List; import org.springframework.core.convert.TypeDescriptor; import org.springframework.expression.AccessException; import org.springframework.expression.EvaluationContext; import org.springframework.expression.MethodExecutor; import org.springframework.lang.Nullable; /** * A {@link org.springframework.expression.MethodResolver} variant for data binding * purposes, using reflection to access instance methods on a given target object. * * <p>This accessor does not resolve static methods and also no technical methods * on {@code java.lang.Object} or {@code java.lang.Class}. * For unrestricted resolution, choose {@link ReflectiveMethodResolver} instead. * * @author Juergen Hoeller * @since 4.3.15 * @see #forInstanceMethodInvocation() * @see DataBindingPropertyAccessor */ public final class DataBindingMethodResolver extends ReflectiveMethodResolver { private DataBindingMethodResolver() { super(); } @Override @Nullable public MethodExecutor resolve(EvaluationContext context, Object targetObject, String name, List<TypeDescriptor> argumentTypes) throws AccessException { if (targetObject instanceof Class) { throw new IllegalArgumentException("DataBindingMethodResolver does not support Class targets"); } return super.resolve(context, targetObject, name, argumentTypes); } @Override protected boolean isCandidateForInvocation(Method method, Class<?> targetClass) { if (Modifier.isStatic(method.getModifiers())) { return false; } Class<?> clazz = method.getDeclaringClass(); return (clazz != Object.class && clazz != Class.class && !ClassLoader.class.isAssignableFrom(targetClass)); } /** * Create a new data-binding method resolver for instance method resolution. */ public static DataBindingMethodResolver forInstanceMethodInvocation() { return new DataBindingMethodResolver(); } }