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JNI binding generator (Android runtime)
/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*/
package com.jogamp.common.util;
import java.lang.reflect.*;
import com.jogamp.common.JogampRuntimeException;
import jogamp.common.Debug;
public final class ReflectionUtil {
public static final boolean DEBUG = Debug.debug("ReflectionUtil");
public static class AWTNames {
public static final String ComponentClass = "java.awt.Component" ;
public static final String GraphicsEnvironmentClass = "java.awt.GraphicsEnvironment";
public static final String isHeadlessMethod = "isHeadless";
}
private static final Class[] zeroTypes = new Class[0];
/**
* Returns true only if the class could be loaded.
*/
public static final boolean isClassAvailable(String clazzName, ClassLoader cl) {
try {
return null != Class.forName(clazzName, false, cl);
} catch (ClassNotFoundException e) {
return false;
}
}
/**
* Loads and returns the class or null.
* @see Class#forName(java.lang.String, boolean, java.lang.ClassLoader)
*/
public static final Class getClass(String clazzName, boolean initialize, ClassLoader cl)
throws JogampRuntimeException {
try {
return getClassImpl(clazzName, initialize, cl);
} catch (ClassNotFoundException e) {
throw new JogampRuntimeException(clazzName + " not available", e);
}
}
private static Class getClassImpl(String clazzName, boolean initialize, ClassLoader cl) throws ClassNotFoundException {
return Class.forName(clazzName, initialize, cl);
}
/**
* @throws JogampRuntimeException if the constructor can not be delivered.
*/
public static final Constructor getConstructor(String clazzName, Class[] cstrArgTypes, ClassLoader cl)
throws JogampRuntimeException {
try {
return getConstructor(getClassImpl(clazzName, true, cl), cstrArgTypes);
} catch (ClassNotFoundException ex) {
throw new JogampRuntimeException(clazzName + " not available", ex);
}
}
static final String asString(Class[] argTypes) {
StringBuilder args = new StringBuilder();
boolean coma = false;
if(null != argTypes) {
for (int i = 0; i < argTypes.length; i++) {
if(coma) {
args.append(", ");
}
args.append(argTypes[i].getName());
coma = true;
}
}
return args.toString();
}
/**
* Returns a compatible constructor
* if available, otherwise throws an exception.
*
* It first attempts to get the specific Constructor
* using the given cstrArgTypes.
* If this fails w/ NoSuchMethodException, a compatible
* Constructor is being looked-up w/ with parameter types assignable
* from the given cstrArgs.
*
*
* @throws JogampRuntimeException if the constructor can not be delivered.
*/
public static final Constructor getConstructor(Class clazz, Class ... cstrArgTypes)
throws JogampRuntimeException {
if(null == cstrArgTypes) {
cstrArgTypes = zeroTypes;
}
Constructor cstr = null;
try {
cstr = clazz.getDeclaredConstructor(cstrArgTypes);
} catch (NoSuchMethodException ex) {
// ok, cont. w/ 'isAssignableFrom()' validation
}
if(null == cstr) {
final Constructor[] cstrs = clazz.getConstructors();
for(int i=0; null==cstr && i c = cstrs[i];
final Class[] types = c.getParameterTypes();
if(types.length == cstrArgTypes.length) {
int j;
for(j=0; j getConstructor(String clazzName, ClassLoader cl)
throws JogampRuntimeException {
return getConstructor(clazzName, null, cl);
}
/**
* @throws JogampRuntimeException if the instance can not be created.
*/
public static final Object createInstance(Constructor cstr, Object ... cstrArgs)
throws JogampRuntimeException, RuntimeException
{
try {
return cstr.newInstance(cstrArgs);
} catch (Exception e) {
Throwable t = e;
if (t instanceof InvocationTargetException) {
t = ((InvocationTargetException) t).getTargetException();
}
if (t instanceof Error) {
throw (Error) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
throw new JogampRuntimeException("can not create instance of "+cstr.getName(), t);
}
}
/**
* @throws JogampRuntimeException if the instance can not be created.
*/
public static final Object createInstance(Class clazz, Class[] cstrArgTypes, Object ... cstrArgs)
throws JogampRuntimeException, RuntimeException
{
return createInstance(getConstructor(clazz, cstrArgTypes), cstrArgs);
}
public static final Object createInstance(Class clazz, Object ... cstrArgs)
throws JogampRuntimeException, RuntimeException
{
Class[] cstrArgTypes = null;
if(null!=cstrArgs) {
cstrArgTypes = new Class[cstrArgs.length];
for(int i=0; i[] cstrArgTypes, Object[] cstrArgs, ClassLoader cl)
throws JogampRuntimeException, RuntimeException
{
try {
return createInstance(getClassImpl(clazzName, true, cl), cstrArgTypes, cstrArgs);
} catch (ClassNotFoundException ex) {
throw new JogampRuntimeException(clazzName + " not available", ex);
}
}
public static final Object createInstance(String clazzName, Object[] cstrArgs, ClassLoader cl)
throws JogampRuntimeException, RuntimeException
{
Class[] cstrArgTypes = null;
if(null!=cstrArgs) {
cstrArgTypes = new Class[cstrArgs.length];
for(int i=0; i clazz, String clazzName) {
do {
if(clazz.getName().equals(clazzName)) {
return true;
}
clazz = clazz.getSuperclass();
} while (clazz!=null);
return false;
}
public static final boolean implementationOf(Object obj, String faceName) {
return implementationOf(obj.getClass(), faceName);
}
public static final boolean implementationOf(Class clazz, String faceName) {
do {
Class[] clazzes = clazz.getInterfaces();
for(int i=clazzes.length-1; i>=0; i--) {
Class face = clazzes[i];
if(face.getName().equals(faceName)) {
return true;
}
}
clazz = clazz.getSuperclass();
} while (clazz!=null);
return false;
}
public static boolean isAWTComponent(Object target) {
return instanceOf(target, AWTNames.ComponentClass);
}
public static boolean isAWTComponent(Class clazz) {
return instanceOf(clazz, AWTNames.ComponentClass);
}
/**
* @throws JogampRuntimeException if the Method can not be found.
*/
public static final Method getMethod(Class clazz, String methodName, Class ... argTypes)
throws JogampRuntimeException, RuntimeException
{
Throwable t = null;
Method m = null;
try {
m = clazz.getDeclaredMethod(methodName, argTypes);
} catch (NoClassDefFoundError ex0) {
t = ex0;
} catch (NoSuchMethodException ex1) {
t = ex1;
}
if(null != t) {
throw new JogampRuntimeException("Method: '" + clazz + "." + methodName + "(" + asString(argTypes) + ")' not found", t);
}
return m;
}
/**
* @throws JogampRuntimeException if the Method can not be found.
*/
public static final Method getMethod(String clazzName, String methodName, Class[] argTypes, ClassLoader cl)
throws JogampRuntimeException, RuntimeException
{
try {
return getMethod(getClassImpl(clazzName, true, cl), methodName, argTypes);
} catch (ClassNotFoundException ex) {
throw new JogampRuntimeException(clazzName + " not available", ex);
}
}
/**
* @param instance may be null in case of a static method
* @param method the method to be called
* @param args the method arguments
* @return the methods result, maybe null if void
* @throws JogampRuntimeException if call fails
* @throws RuntimeException if call fails
*/
public static final Object callMethod(Object instance, Method method, Object ... args)
throws JogampRuntimeException, RuntimeException
{
try {
return method.invoke(instance, args);
} catch (Exception e) {
Throwable t = e;
if (t instanceof InvocationTargetException) {
t = ((InvocationTargetException) t).getTargetException();
}
if (t instanceof Error) {
throw (Error) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
throw new JogampRuntimeException("calling "+method+" failed", t);
}
}
/**
* @throws JogampRuntimeException if the instance can not be created.
*/
public static final Object callStaticMethod(String clazzName, String methodName, Class[] argTypes, Object[] args, ClassLoader cl)
throws JogampRuntimeException, RuntimeException
{
return callMethod(null, getMethod(clazzName, methodName, argTypes, cl), args);
}
/** Convenient Method access class */
public static class MethodAccessor {
Method m = null;
/** Check {@link #available()} before using instance. */
public MethodAccessor(Class clazz, String methodName, Class ... argTypes) {
try {
m = ReflectionUtil.getMethod(clazz, methodName, argTypes);
} catch (JogampRuntimeException jre) { /* method n/a */ }
}
/** Returns true if method is available, otherwise false. */
public boolean available() {
return null != m;
}
/**
* Check {@link #available()} before calling to avoid throwing a JogampRuntimeException.
* @throws JogampRuntimeException if method is not available
*/
public Object callMethod(Object instance, Object ... args) {
if(null == m) {
throw new JogampRuntimeException("Method not available. Instance: "+instance);
}
return ReflectionUtil.callMethod(instance, m, args);
}
}
}