/*
 * 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,
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 * See the License for the specific language governing permissions and
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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 MethodResolver variant for data binding purposes, using reflection to access instance methods on a given target object.

This accessor does not resolve static methods and also no technical methods on java.lang.Object or java.lang.Class. For unrestricted resolution, choose ReflectiveMethodResolver instead.

Author:Juergen Hoeller
See Also:
Since:4.3.15
/** * 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.
/** * Create a new data-binding method resolver for instance method resolution. */
public static DataBindingMethodResolver forInstanceMethodInvocation() { return new DataBindingMethodResolver(); } }