/*
* Copyright 2002-2011 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.ast;
import java.util.List;
import org.springframework.core.convert.TypeDescriptor;
/**
* Utility methods (formatters, etc) used during parsing and evaluation.
*
* @author Andy Clement
*/
public class FormatHelper {
/**
* Produce a nice string 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 nicely formatted string, eg. foo(String,int)
*/
public static String formatMethodForMessage(String name, List<TypeDescriptor> argumentTypes) {
StringBuilder sb = new StringBuilder();
sb.append(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();
}
/**
* Produce a nice string for a given class object.
* For example, 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
*/
public static String formatClassNameForMessage(Class<?> clazz) {
if (clazz == null) {
return "null";
}
StringBuilder fmtd = new StringBuilder();
if (clazz.isArray()) {
int dims = 1;
Class baseClass = clazz.getComponentType();
while (baseClass.isArray()) {
baseClass = baseClass.getComponentType();
dims++;
}
fmtd.append(baseClass.getName());
for (int i = 0; i < dims; i++) {
fmtd.append("[]");
}
} else {
fmtd.append(clazz.getName());
}
return fmtd.toString();
}
}