Add default value to <input>.

Submitted by:	Scott Sanders <ssanders@nextance.com>


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273043 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -11,6 +11,8 @@ properties files and output them instead of Ant's properties.
 
 * <filterset> will now resolve filters recursively.
 
+* <input> has a new attribute that allows you to specify a default value.
+
 Changes from Ant 1.4.1 to Ant 1.5
 =================================
 

src/main/org/apache/tools/ant/taskdefs/Input.java

@@ -77,6 +77,7 @@ public class Input extends Task {
     private String validargs = null;
     private String message = "";
     private String addproperty = null;
+    private String defaultvalue = null;
 
     /**
      * Defines valid input parameters as comma separated strings. If set, input
@@ -109,6 +110,17 @@ public class Input extends Task {
         this.message = message;
     }
 
+    /**
+     * Defines the default value of the property to be created from input.
+     * Property value will be set to default if not input is received.
+     *
+     * @param defaultvalue Default value for the property if no input
+     * is received
+     */
+    public void setDefaultvalue (String defaultvalue) {
+        this.defaultvalue = defaultvalue;
+    }
+
     /**
      * Set a multiline message.
      */
@@ -137,8 +149,13 @@ public class Input extends Task {
 
         getProject().getInputHandler().handleInput(request);
 
+        String value = request.getInput();
+        if ((value == null || value.trim().length() == 0) 
+            && defaultvalue != null) {
+            value = defaultvalue;
+        }
         if (addproperty != null) {
-            project.setNewProperty(addproperty, request.getInput());
+            project.setNewProperty(addproperty, value);
         }
     }