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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package org.glassfish.hk2.utilities.reflection;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collection;
/**
* @author jwells
*
*/
public class Pretty {
private static final String DOT = ".";
private static final String NULL_STRING = "null";
/**
* Makes a nice, pretty class (without the package name)
*
* @param clazz Make me a pretty class
* @return A nice string of the class, with no package
*/
public static String clazz(Class clazz) {
if (clazz == null) return NULL_STRING;
String cn = clazz.getName();
int index = cn.lastIndexOf(DOT);
if (index < 0) return cn;
// If this fails, the class name somehow ends in dot, which should be illegal
return cn.substring(index + 1);
}
/**
* Prints a pretty parameterized type
*
* @param pType The parameterized type to print. May not be null
* @return A pretty string version of the parameterized type
*/
public static String pType(ParameterizedType pType) {
StringBuffer sb = new StringBuffer();
sb.append(clazz(ReflectionHelper.getRawClass(pType)) + "<");
boolean first = true;
for (Type t : pType.getActualTypeArguments()) {
if (first) {
first = false;
sb.append(type(t));
}
else {
sb.append("," + type(t));
}
}
sb.append(">");
return sb.toString();
}
/**
* Returns a pretty string for the given type
* @param t A possibly null type
* @return A pretty string representing the type
*/
public static String type(Type t) {
if (t == null) return NULL_STRING;
if (t instanceof Class) {
return clazz((Class) t);
}
if (t instanceof ParameterizedType) {
return pType((ParameterizedType) t);
}
return t.toString();
}
private final static String CONSTRUCTOR_NAME = "";
/**
* Make a nice pretty string out of the constructor and all its
* parameters
*
* @param constructor The constructor to make pretty
* @return A nice pretty string
*/
public static String constructor(Constructor constructor) {
if (constructor == null) return NULL_STRING;
return CONSTRUCTOR_NAME + prettyPrintParameters(constructor.getParameterTypes());
}
/**
* Makes a nice pretty string of the method, with the method name
* and all parameters
*
* @param method The method to make pretty
* @return A nice pretty string
*/
public static String method(Method method) {
if (method == null) return NULL_STRING;
return method.getName() + prettyPrintParameters(method.getParameterTypes());
}
/**
* Returns a pretty string representing a Field
* @param field The possibly null field
* @return A pretty string representing the field
*/
public static String field(Field field) {
if (field == null) return NULL_STRING;
Type t = field.getGenericType();
String baseString;
if (t instanceof Class) {
baseString = clazz((Class) t);
}
else {
baseString = type(t);
}
return "field(" + baseString + " " + field.getName() + " in " + field.getDeclaringClass().getName() + ")";
}
/**
* Returns a pretty string for the given array
* @param array The possibly null array to represent
* @return A pretty string representation of the array
*/
public static String array(Object[] array) {
if (array == null) return NULL_STRING;
StringBuffer sb = new StringBuffer("{");
boolean first = true;
for (Object item : array) {
if (item != null && (item instanceof Class)) {
item = Pretty.clazz((Class) item);
}
if (first) {
first = false;
sb.append((item == null) ? "null" : item.toString());
}
else {
sb.append("," + ((item == null) ? "null" : item.toString()));
}
}
sb.append("})");
return sb.toString();
}
/**
* Returns a pretty string representing the collection
* @param collection A possibly null collection to represent
* @return A pretty string representing the collection
*/
public static String collection(Collection collection) {
if (collection == null) return NULL_STRING;
return array(collection.toArray(new Object[collection.size()]));
}
private static String prettyPrintParameters(Class params[]) {
if (params == null) return NULL_STRING;
StringBuffer sb = new StringBuffer("(");
boolean first = true;
for (Class param : params) {
if (first) {
sb.append(clazz(param));
first = false;
}
else {
sb.append("," + clazz(param));
}
}
sb.append(")");
return sb.toString();
}
}