/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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.html
* or glassfish/bootstrap/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 glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* 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
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
/**
* WBN -- generic mechanism for simulating toString() and equals()
* for any class
*/
package com.sun.enterprise.util.diagnostics;
import java.lang.reflect.*;
import java.util.Vector;
import com.sun.enterprise.util.diagnostics.Reporter;
import com.sun.enterprise.util.StringUtils;
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)
{
String s = new String();
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;
s = s + m.toString() + '\n';
}
return s;
}
////////////////////////////////////////////////////////////////////////////
/**
* @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
if(! (obj instanceof Object))
throw new ObjectAnalyzerException(fatal + "Object parameter is not really a java.lang.Object");//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 != null && !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
}
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 = "<null>";//NOI18N
else
sval = val.toString();
}
catch (IllegalAccessException e)
{
sval = "<IllegalAccessException>";//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)
{
Reporter.warn("Got an exception invoking setAccessible: " + e);//NOI18N
}
}
////////////////////////////////////////////////////////////////////////////
private static void setupSetAccessibleMethod()
{
// whoa! what's this reflection crap 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)
{
Reporter.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
{
Reporter.verbose("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 = new String("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;
}
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