From 9d7a9a6b6c11f3affe850da4ea01a55af6d14b16 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Fri, 30 Sep 2011 20:50:54 +0200
Subject: Enhance ReflectionUtil getConstructor(..) w/ 2nd attempt of cstr
look-up w/ assignable types
---
.../com/jogamp/common/util/ReflectionUtil.java | 44 +++++++++++++++++++---
1 file changed, 39 insertions(+), 5 deletions(-)
(limited to 'src/java/com/jogamp/common/util')
diff --git a/src/java/com/jogamp/common/util/ReflectionUtil.java b/src/java/com/jogamp/common/util/ReflectionUtil.java
index 01fc736..6345efa 100644
--- a/src/java/com/jogamp/common/util/ReflectionUtil.java
+++ b/src/java/com/jogamp/common/util/ReflectionUtil.java
@@ -38,6 +38,7 @@
package com.jogamp.common.util;
import java.lang.reflect.*;
+
import com.jogamp.common.JogampRuntimeException;
import jogamp.common.Debug;
@@ -103,18 +104,51 @@ public final class ReflectionUtil {
}
/**
+ * Returns a compatible constructor
+ * if available, otherwise throws an exception.
+ * <p>
+ * It first attempts to get the specific Constructor
+ * using the given <code>cstrArgTypes</code>.
+ * If this fails w/ <code>NoSuchMethodException</code>, a compatible
+ * Constructor is being looked-up w/ with parameter types assignable
+ * from the given <code>cstrArgs</code>.
+ * </p>
+ *
* @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 {
- if(null == cstrArgTypes) {
- cstrArgTypes = zeroTypes;
- }
- return clazz.getDeclaredConstructor(cstrArgTypes);
+ cstr = clazz.getDeclaredConstructor(cstrArgTypes);
} catch (NoSuchMethodException ex) {
- throw new JogampRuntimeException("Constructor: '" + clazz + "(" + asString(cstrArgTypes) + ")' not found", ex);
+ // ok, cont. w/ 'isAssignableFrom()' validation
+ }
+ if(null == cstr) {
+ final Constructor<?>[] cstrs = clazz.getConstructors();
+ for(int i=0; null==cstr && i<cstrs.length; i++) {
+ final Constructor<?> c = cstrs[i];
+ final Class<?>[] types = c.getParameterTypes();
+ if(types.length == cstrArgTypes.length) {
+ int j;
+ for(j=0; j<types.length; j++) {
+ if(!types[j].isAssignableFrom(cstrArgTypes[j])) {
+ break; // cont w/ next cstr
+ }
+ }
+ if(types.length == j) {
+ cstr = c; // gotcha
+ }
+ }
+ }
+ }
+ if(null == cstr) {
+ throw new JogampRuntimeException("Constructor: '" + clazz.getName() + "(" + asString(cstrArgTypes) + ")' not found");
}
+ return cstr;
}
public static final Constructor<?> getConstructor(String clazzName, ClassLoader cl)
--
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