/*
 * 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
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 * See the License for the specific language governing permissions and
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package org.springframework.expression.spel.ast;

import java.util.List;

import org.springframework.core.convert.TypeDescriptor;
import org.springframework.lang.Nullable;
import org.springframework.util.ClassUtils;

Utility methods (formatters etc) used during parsing and evaluation.
Author:Andy Clement
/** * Utility methods (formatters etc) used during parsing and evaluation. * * @author Andy Clement */
abstract class FormatHelper {
Produce a readable representation for a given method name with specified arguments.
Params:
  • name – the name of the method
  • argumentTypes – the types of the arguments to the method
Returns:a nicely formatted representation, e.g. foo(String,int)
/** * Produce a readable representation for a given method name with specified arguments. * @param name the name of the method * @param argumentTypes the types of the arguments to the method * @return a nicely formatted representation, e.g. {@code foo(String,int)} */
public static String formatMethodForMessage(String name, List<TypeDescriptor> argumentTypes) { StringBuilder sb = new StringBuilder(name); sb.append("("); for (int i = 0; i < argumentTypes.size(); i++) { if (i > 0) { sb.append(","); } TypeDescriptor typeDescriptor = argumentTypes.get(i); if (typeDescriptor != null) { sb.append(formatClassNameForMessage(typeDescriptor.getType())); } else { sb.append(formatClassNameForMessage(null)); } } sb.append(")"); return sb.toString(); }
Determine a readable name for a given Class object.

A String array will have the formatted name "java.lang.String[]".

Params:
  • clazz – the Class whose name is to be formatted
See Also:
Returns:a formatted String suitable for message inclusion
/** * Determine a readable name for a given Class object. * <p>A String array will have the formatted name "java.lang.String[]". * @param clazz the Class whose name is to be formatted * @return a formatted String suitable for message inclusion * @see ClassUtils#getQualifiedName(Class) */
public static String formatClassNameForMessage(@Nullable Class<?> clazz) { return (clazz != null ? ClassUtils.getQualifiedName(clazz) : "null"); } }