1 files changed, 149 insertions, 0 deletions
diff --git a/src/nwi/classes/com/sun/nwi/impl/NWReflection.java b/src/nwi/classes/com/sun/nwi/impl/NWReflection.java
new file mode 100644
index 0000000..51037af
--- /dev/null
+++ b/src/nwi/classes/com/sun/nwi/impl/NWReflection.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. 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.sun.nwi.impl;
+
+import java.lang.reflect.*;
+import javax.media.nwi.*;
+
+public final class NWReflection {
+  public static final boolean DEBUG = Debug.debug("NWReflection");
+
+  public static final boolean isClassAvailable(String clazzName) {
+    try {
+        Class clazz = Class.forName(clazzName);
+        return null!=clazz;
+    } catch (Throwable e) { }
+    return false;
+  }
+
+  public static final Class getClass(String clazzName) {
+    try {
+        return Class.forName(clazzName);
+    } catch (Throwable e) { }
+    return null;
+  }
+
+  public static final Constructor getConstructor(String clazzName, Class[] cstrArgTypes) {
+    Class factoryClass = null;
+    Constructor factory = null;
+
+    try {
+        factoryClass = Class.forName(clazzName);
+        if (factoryClass == null) {
+          throw new NWException(clazzName + " not available");
+        }
+        try {
+            factory = factoryClass.getDeclaredConstructor( cstrArgTypes );
+        } catch(NoSuchMethodException nsme) {
+          throw new NWException("Constructor: '" + clazzName + "("+cstrArgTypes+")' not found");
+        }
+        return factory;
+    } catch (Throwable e) { 
+      if (DEBUG) {
+          e.printStackTrace();
+      }
+      throw new NWException(e);
+    }
+  }
+
+  public static final Constructor getConstructor(String clazzName) {
+    return getConstructor(clazzName, new Class[0]);
+  }
+
+  public static final Object createInstance(String clazzName, Class[] cstrArgTypes, Object[] cstrArgs) {
+    Constructor factory = null;
+
+    try {
+        factory = getConstructor(clazzName, cstrArgTypes);
+        return factory.newInstance( cstrArgs ) ;
+    } catch (Exception e) {
+      throw new NWException(e);
+    }
+  }
+
+  public static final Object createInstance(String clazzName, Object[] cstrArgs) {
+    Class[] cstrArgTypes = new Class[cstrArgs.length];
+    for(int i=0; i<cstrArgs.length; i++) {
+        cstrArgTypes[i] = cstrArgs[i].getClass();
+    }
+    return createInstance(clazzName, cstrArgTypes, cstrArgs);
+  }
+
+  public static final Object createInstance(String clazzName) {
+    return createInstance(clazzName, new Class[0], null);
+  }
+
+  public static final boolean instanceOf(Object obj, String clazzName) {
+    return instanceOf(obj.getClass(), clazzName);
+  }
+  public static final boolean instanceOf(Class 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, "java.awt.Component");
+  }
+
+  public static boolean isAWTComponent(Class clazz) {
+      return instanceOf(clazz, "java.awt.Component");
+  }
+
+}
+