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com.sun.enterprise.util.ObjectAnalyzer Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
/**
* WBN -- generic mechanism for simulating toString() and equals()
* for any class
*/
package com.sun.enterprise.util;
//
import java.lang.reflect.*;
import java.util.Vector;
import java.util.logging.*;
public class ObjectAnalyzer {
/**
* @param className
* @return */
public static String getMethods(String className) {
try {
Class clazz = Class.forName(className);
return getMethods(clazz, false);
}
catch (Exception e) {
return "Error loading class: " + e.getMessage();//NOI18N
}
}
////////////////////////////////////////////////////////////////////////////
/**
* @param obj
* @return */
public static String getMethods(Object obj) {
return getMethods(obj, false);
}
////////////////////////////////////////////////////////////////////////////
/**
* @param obj
* @param settersOnly
* @return */
public static String getMethods(Object obj, boolean settersOnly) {
try {
Class clazz = safeGetClass(obj);
return getMethods(clazz, settersOnly);
}
catch (Exception e) {
return e.getMessage();
}
}
////////////////////////////////////////////////////////////////////////////
/**
* @param clazz
* @param settersOnly
* @return */
public static String getMethods(Class clazz, boolean settersOnly) {
StringBuilder sb = new StringBuilder();
Method[] methods = clazz.getMethods();
for (int i = 0; i < methods.length; i++) {
Method m = methods[i];
boolean isSetter = m.getName().startsWith("set");//NOI18N
if (settersOnly && isSetter == false)
continue;
sb.append(m.toString()).append('\n');
}
return sb.toString();
}
////////////////////////////////////////////////////////////////////////////
/**
* @param obj
* @return */
public static String getSetters(Object obj) {
return getMethods(obj, true);
}
////////////////////////////////////////////////////////////////////////////
/**
* @param clazz
* @return */
public static String getSetters(Class clazz) {
return getMethods(clazz, true);
}
////////////////////////////////////////////////////////////////////////////
/**
* @param obj
* @return */
public static String toString(Object obj) {
return toString(obj, false);
}
////////////////////////////////////////////////////////////////////////////
/**
* @param obj
* @return */
public static String toStringWithSuper(Object obj) {
return toString(obj, true);
}
////////////////////////////////////////////////////////////////////////////
/**
* @param a
* @param b
* @return */
public static boolean equals(Object a, Object b) {
Class cl = a.getClass();
if (!cl.equals(b.getClass()))
return false;
Field[] fields = cl.getDeclaredFields();
setAccessible(fields);
for (int i = 0; i < fields.length; i++) {
Field f = fields[i];
try {
if (!f.get(a).equals(f.get(b)))
return false;
}
catch (IllegalAccessException e) {
return false;
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////
public static void useShortClassNames() {
useShortClassNames_ = true;
}
////////////////////////////////////////////////////////////////////////////
public static void useLongClassNames() {
useShortClassNames_ = false;
}
////////////////////////////////////////////////////////////////////////////
private static String toString(Object obj, boolean doSuperClasses) {
try {
return getFieldInfo(obj, doSuperClasses).toString();
}
catch (ObjectAnalyzerException e) {
return e.getMessage();
}
}
////////////////////////////////////////////////////////////////////////////
private static Class safeGetClass(Object obj) throws ObjectAnalyzerException {
if (obj == null)
throw new ObjectAnalyzerException(fatal + "null Object parameter");//NOI18N
Class cl = obj.getClass();
if (cl == null)
throw new ObjectAnalyzerException(fatal + "getClass() on parameter Object returned null");//NOI18N
return cl;
}
////////////////////////////////////////////////////////////////////////////
private static Class safeGetSuperclass(Class cl) throws ObjectAnalyzerException {
Class sc = cl.getSuperclass();
if (sc == null)
throw new ObjectAnalyzerException("getSuperclass() on parameter Object returned null");//NOI18N
return sc;
}
////////////////////////////////////////////////////////////////////////////
private static FieldInfoVector getFieldInfo(Object obj, boolean doSuperClasses) throws ObjectAnalyzerException {
FieldInfoVector fiv = new FieldInfoVector();
Class cl = safeGetClass(obj);
if (doSuperClasses == false) {
getFieldInfo(cl, obj, fiv);
return fiv;
}
for (Class theClass = cl; !theClass.equals(Object.class); theClass = safeGetSuperclass(theClass))
getFieldInfo(theClass, obj, fiv);
return fiv;
}
////////////////////////////////////////////////////////////////////////////
private static void getFieldInfo(Class cl, Object obj, FieldInfoVector fiv) throws ObjectAnalyzerException {
Field[] fields = null;
try {
fields = cl.getDeclaredFields();
}
catch (SecurityException e) {
throw new ObjectAnalyzerException("got a SecurityException when calling getDeclaredFields() on " + cl.getName());//NOI18N
}
// FindBugs says this is a redundant null check. We are now depending
// on (assuming) that getDeclaredFields() will never return null;
//if (fields == null)
//throw new ObjectAnalyzerException("calling getDeclaredFields() on " + cl.getName() + " returned null");//NOI18N
setAccessible(fields);
for (int i = 0; i < fields.length; i++) {
Field f = fields[i];
String sval;
String modifiers = Modifier.toString(f.getModifiers());
String className = cl.getName();
if (useShortClassNames_)
className = StringUtils.toShortClassName(className);
if (modifiers.length() <= 0)
modifiers = "(package)";//NOI18N
try {
Object val = f.get(obj);
if (val == null)
sval = "";//NOI18N
else
sval = val.toString();
}
catch (IllegalAccessException e) {
sval = "";//NOI18N
}
fiv.addElement(new FieldInfo(className, f, sval, modifiers));
}
}
////////////////////////////////////////////////////////////////////////////
private static void setAccessible(Field[] fields) {
if (setAccessibleMethod == null)
return; // Must be pre JDK 1.2.x
try {
Boolean b = Boolean.valueOf(true);
setAccessibleMethod.invoke(null, new Object[]{fields, b});
}
catch (Exception e) {
Logger.getAnonymousLogger().warning("Got an exception invoking setAccessible: " + e);//NOI18N
}
}
////////////////////////////////////////////////////////////////////////////
private static void setupSetAccessibleMethod() {
// whoa! what's this reflection stuff doing here?
// AccessibleObject is a JDK 1.2 class that lets you peek at
// private variable values. Since we need to support JDK 1.1
// for the VCafe plug-in -- it is now called via 100% reflection
// techniques...
setAccessibleMethod = null;
Class AO;
try {
AO = Class.forName("java.lang.reflect.AccessibleObject");//NOI18N
}
catch (ClassNotFoundException e) {
Logger.getAnonymousLogger().info("Can't find java.lang.reflect.AccessibleObject -- thus I can't show any private or protected variable values. This must be pre JDK 1.2.x");//NOI18N
return;
}
Method[] methods = AO.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
Method m = methods[i];
if (m.getName().equals("setAccessible") && m.getParameterTypes().length == 2)//NOI18N
{
if(Logger.getAnonymousLogger().isLoggable(Level.FINER))
Logger.getAnonymousLogger().finer("Found setAccessible: " + m);//NOI18N
setAccessibleMethod = m;
break;
}
}
}
////////////////////////////////////////////////////////////////////////////
private static final String fatal = "Fatal Error in ObjectAnalyzer.toString(): ";//NOI18N
private static boolean useShortClassNames_ = true;
private static Method setAccessibleMethod;
static {
setupSetAccessibleMethod();
}
////////////////////////////////////////////////////////////////////////////
/**
* @param args */
public static void main(String[] args) {
String s = "Hello!";//NOI18N
System.out.println("Regular: \n" + toString(s) + "\n\n");//NOI18N
System.out.println("Super: \n" + toStringWithSuper(s) + "\n\n");//NOI18N
}
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
class ObjectAnalyzerException extends Exception {
ObjectAnalyzerException(String s) {
super(s);
}
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
class FieldInfo {
Field field;
String value;
//Class clazz;
String className;
String modifiers;
FieldInfo(String c, Field f, String v, String m) {
className = c;
field = f;
value = v;
modifiers = m;
}
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
class FieldInfoVector // { extends Vector
{
Vector v = null;
FieldInfoVector() {
v = new Vector();
}
////////////////////////////////////////////////////////////////////////////
/**
* @param o */
public void addElement(Object o) {
v.addElement(o);
}
////////////////////////////////////////////////////////////////////////////
/**
* @return */
public String toString() {
int veclen = v.size();
StringBuffer s = new StringBuffer();
setLongestNames();
//s.append("classNameLength: " + classNameLength + "fieldNameLength: " + fieldNameLength + "modifiersLength: " + modifiersLength + "\n\n");//NOI18N
s.append(StringUtils.padRight("Class", classNameLength));//NOI18N
s.append(StringUtils.padRight("Modifiers", modifiersLength));//NOI18N
s.append(StringUtils.padRight("Field", fieldNameLength));//NOI18N
s.append("Value");//NOI18N
s.append("\n\n");//NOI18N
for (int i = 0; i < veclen; i++) {
FieldInfo fi = fetch(i);
s.append(StringUtils.padRight(fi.className, classNameLength));
s.append(StringUtils.padRight(fi.modifiers, modifiersLength));
s.append(StringUtils.padRight(fi.field.getName(), fieldNameLength));
s.append(fi.value);
s.append('\n');
}
return s.toString();
}
////////////////////////////////////////////////////////////////////////////
private FieldInfo fetch(int i) {
return (FieldInfo) v.elementAt(i);
}
////////////////////////////////////////////////////////////////////////////
private void setLongestNames() {
int veclen = v.size();
classNameLength = 5;
fieldNameLength = 5;
modifiersLength = 5;
for (int i = 0; i < veclen; i++) {
FieldInfo fi = fetch(i);
int clen = fi.className.length();
int flen = fi.field.getName().length();
int mlen = fi.modifiers.length();
if (clen > classNameLength)
classNameLength = clen;
if (flen > fieldNameLength)
fieldNameLength = flen;
if (mlen > modifiersLength)
modifiersLength = mlen;
}
classNameLength += 2;
fieldNameLength += 2;
modifiersLength += 2;
}
////////////////////////////////////////////////////////////////////////////
private int classNameLength = 0;
private int fieldNameLength = 0;
private int modifiersLength = 0;
}
