From ce57ab760f69de6db452def7ffbf5b114a2d8694 Mon Sep 17 00:00:00 2001
From: mark <mark@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 10 Mar 2006 21:46:48 +0000
Subject:        Imported GNU Classpath 0.90        * scripts/makemake.tcl: Set
 gnu/java/awt/peer/swing to ignore.        * gnu/classpath/jdwp/VMFrame.java
 (SIZE): New constant.        * java/lang/VMCompiler.java: Use
 gnu.java.security.hash.MD5.        * java/lang/Math.java: New override file. 
       * java/lang/Character.java: Merged from Classpath.        (start, end):
 Now 'int's.        (canonicalName): New field.        (CANONICAL_NAME,
 NO_SPACES_NAME, CONSTANT_NAME): New constants.        (UnicodeBlock): Added
 argument.        (of): New overload.        (forName): New method.       
 Updated unicode blocks.        (sets): Updated.        * sources.am:
 Regenerated.        * Makefile.in: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111942 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libjava/classpath/java/awt/CardLayout.java | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

(limited to 'libjava/classpath/java/awt/CardLayout.java')

diff --git a/libjava/classpath/java/awt/CardLayout.java b/libjava/classpath/java/awt/CardLayout.java
index 8582c5f099b..8b3fea2ca23 100644
--- a/libjava/classpath/java/awt/CardLayout.java
+++ b/libjava/classpath/java/awt/CardLayout.java
@@ -117,7 +117,7 @@ public class CardLayout implements LayoutManager2, Serializable
   /**
    * Cause the first component in the container to be displayed.
    *
-   * @param parent The parent container
+   * @param parent The parent container, not <code>null</code>.
    */
   public void first (Container parent)
   {
@@ -181,7 +181,7 @@ public class CardLayout implements LayoutManager2, Serializable
   /**
    * Cause the last component in the container to be displayed.
    * 
-   * @param parent The parent container
+   * @param parent The parent container, not <code>null</code>.
    */
   public void last (Container parent)
   {
@@ -247,7 +247,7 @@ public class CardLayout implements LayoutManager2, Serializable
    * this current card is the  last one in the deck, the first
    * component is displayed.
    * 
-   * @param parent The parent container
+   * @param parent The parent container, not <code>null</code>.
    */
   public void next (Container parent)
   {
@@ -271,7 +271,7 @@ public class CardLayout implements LayoutManager2, Serializable
    * If this current card is the first one in the deck, the last
    * component is displayed.
    * 
-   * @param parent The parent container
+   * @param parent The parent container, not <code>null</code>.
    */
   public void previous (Container parent)
   {
@@ -321,13 +321,19 @@ public class CardLayout implements LayoutManager2, Serializable
 
   /**
    * Cause the named component to be shown.  If the component name is
-   * unknown, this method does nothing.
+   * unknown or <code>null</code>, this method does nothing.
    * 
-   * @param parent The parent container
-   * @param name The name of the component to show
+   * @param parent The parent container, not <code>null</code>.
+   * @param name The name of the component to show 
    */
   public void show (Container parent, String name)
   {
+    if (name == null)
+      return;
+   
+    if (parent.getLayout() != this)
+      throw new IllegalArgumentException("parent's layout is not this CardLayout");
+    
     Object target = tab.get (name);
     if (target != null)
       {
@@ -362,9 +368,15 @@ public class CardLayout implements LayoutManager2, Serializable
    * 
    * @param parent The parent container
    * @param what The type of goto: FIRST, LAST, NEXT or PREV
+   * 
+   * @throws IllegalArgumentException if parent has not this 
+   * CardLayout set as its layout.
    */
   private void gotoComponent (Container parent, int what)
   {
+    if (parent.getLayout() != this)
+      throw new IllegalArgumentException("parent's layout is not this CardLayout");
+    
     synchronized (parent.getTreeLock ())
       {
 	int num = parent.ncomponents;
-- 
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