From 1865f0b68d0af1c7d90b4b5bcb1aec91054c724b Mon Sep 17 00:00:00 2001
From: Henri Yandell <bayard@apache.org>
Date: Mon, 22 Mar 2010 06:22:28 +0000
Subject: [PATCH] Vararging constructor methods; much like the method ones were
 in MethodUtils. LANG-396

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@925970 13f79535-47bb-0310-9956-ffa450edef68
---
 .../lang3/reflect/ConstructorUtils.java       | 69 ++-----------------
 1 file changed, 4 insertions(+), 65 deletions(-)

diff --git a/src/main/java/org/apache/commons/lang3/reflect/ConstructorUtils.java b/src/main/java/org/apache/commons/lang3/reflect/ConstructorUtils.java
index c7a968d8c..a7792e924 100644
--- a/src/main/java/org/apache/commons/lang3/reflect/ConstructorUtils.java
+++ b/src/main/java/org/apache/commons/lang3/reflect/ConstructorUtils.java
@@ -64,30 +64,6 @@ public ConstructorUtils() {
         super();
     }
 
-    /**
-     * <p>Convenience method returning new instance of <code>klazz</code> using a single argument constructor.
-     * The formal parameter type is inferred from the actual values of <code>arg</code>.
-     * See {@link #invokeExactConstructor(Class, Object[], Class[])} for more details.</p>
-     *
-     * <p>The signatures should be assignment compatible.</p>
-     *
-     * @param cls the class to be constructed.
-     * @param arg the actual argument
-     * @return new instance of <code>klazz</code>
-     *
-     * @throws NoSuchMethodException If the constructor cannot be found
-     * @throws IllegalAccessException If an error occurs accessing the constructor
-     * @throws InvocationTargetException If an error occurs invoking the constructor
-     * @throws InstantiationException If an error occurs instantiating the class
-     *
-     * @see #invokeConstructor(java.lang.Class, java.lang.Object[], java.lang.Class[])
-     */
-    public static <T> T invokeConstructor(Class<T> cls, Object arg)
-            throws NoSuchMethodException, IllegalAccessException,
-            InvocationTargetException, InstantiationException {
-        return invokeConstructor(cls, new Object[] { arg });
-    }
-
     /**
      * <p>Returns new instance of <code>klazz</code> created using the actual arguments <code>args</code>.
      * The formal parameter types are inferred from the actual values of <code>args</code>.
@@ -106,7 +82,7 @@ public static <T> T invokeConstructor(Class<T> cls, Object arg)
      *
      * @see #invokeConstructor(java.lang.Class, java.lang.Object[], java.lang.Class[])
      */
-    public static <T> T invokeConstructor(Class<T> cls, Object[] args)
+    public static <T> T invokeConstructor(Class<T> cls, Object... args)
             throws NoSuchMethodException, IllegalAccessException,
             InvocationTargetException, InstantiationException {
         if (null == args) {
@@ -155,30 +131,6 @@ public static <T> T invokeConstructor(Class<T> cls, Object[] args,
         return ctor.newInstance(args);
     }
 
-    /**
-     * <p>Convenience method returning new instance of <code>klazz</code> using a single argument constructor.
-     * The formal parameter type is inferred from the actual values of <code>arg</code>.
-     * See {@link #invokeExactConstructor(Class, Object[], Class[])} for more details.</p>
-     *
-     * <p>The signatures should match exactly.</p>
-     *
-     * @param cls the class to be constructed.
-     * @param arg the actual argument
-     * @return new instance of <code>klazz</code>
-     *
-     * @throws NoSuchMethodException If the constructor cannot be found
-     * @throws IllegalAccessException If an error occurs accessing the constructor
-     * @throws InvocationTargetException If an error occurs invoking the constructor
-     * @throws InstantiationException If an error occurs instantiating the class
-     *
-     * @see #invokeExactConstructor(java.lang.Class, java.lang.Object[], java.lang.Class[])
-     */
-    public static <T> T invokeExactConstructor(Class<T> cls, Object arg)
-            throws NoSuchMethodException, IllegalAccessException,
-            InvocationTargetException, InstantiationException {
-        return invokeExactConstructor(cls, new Object[] { arg });
-    }
-
     /**
      * <p>Returns new instance of <code>klazz</code> created using the actual arguments <code>args</code>.
      * The formal parameter types are inferred from the actual values of <code>args</code>.
@@ -197,7 +149,7 @@ public static <T> T invokeExactConstructor(Class<T> cls, Object arg)
      *
      * @see #invokeExactConstructor(java.lang.Class, java.lang.Object[], java.lang.Class[])
      */
-    public static <T> T invokeExactConstructor(Class<T> cls, Object[] args)
+    public static <T> T invokeExactConstructor(Class<T> cls, Object... args)
             throws NoSuchMethodException, IllegalAccessException,
             InvocationTargetException, InstantiationException {
         if (null == args) {
@@ -248,19 +200,6 @@ public static <T> T invokeExactConstructor(Class<T> cls, Object[] args,
         return ctor.newInstance(args);
     }
 
-    /**
-     * Returns a constructor with single argument.
-     * @param cls the class to be constructed
-     * @param parameterType The constructor parameter type
-     * @return null if matching accessible constructor can not be found.
-     * @see Class#getConstructor
-     * @see #getAccessibleConstructor(java.lang.reflect.Constructor)
-     */
-    public static <T> Constructor<T> getAccessibleConstructor(Class<T> cls,
-            Class<?> parameterType) {
-        return getAccessibleConstructor(cls, new Class[] { parameterType });
-    }
-
     /**
      * Returns a constructor given a class and signature.
      * @param cls the class to be constructed
@@ -270,7 +209,7 @@ public static <T> Constructor<T> getAccessibleConstructor(Class<T> cls,
      * @see #getAccessibleConstructor(java.lang.reflect.Constructor)
      */
     public static <T> Constructor<T> getAccessibleConstructor(Class<T> cls,
-            Class<?>[] parameterTypes) {
+            Class<?>... parameterTypes) {
         try {
             return getAccessibleConstructor(cls.getConstructor(parameterTypes));
         } catch (NoSuchMethodException e) {
@@ -307,7 +246,7 @@ public static <T> Constructor<T> getAccessibleConstructor(Constructor<T> ctor) {
      */
     @SuppressWarnings("unchecked")
     public static <T> Constructor<T> getMatchingAccessibleConstructor(Class<T> cls,
-            Class<?>[] parameterTypes) {
+            Class<?>... parameterTypes) {
         // see if we can find the constructor directly
         // most of the time this works and it's much faster
         try {