Implement hashCode() and equals() for ActionFile, FunctionFile, SkinFile and

Template classes. This is required for ZippedAppFile to when removing
Updatables that are no longer contained (revision 1.19 from Dec 7 2004).
Fixes bug 395.

src/helma/framework/core/SkinFile.java

@@ -164,6 +164,28 @@ public final class SkinFile implements Updatable {
      * @return ...
      */
     public String toString() {
-        return "[SkinFile "+prototype.getName() + "/" + name+"]";
+        return new StringBuffer("[SkinFile ").append(prototype.getName())
+                      .append("/").append(name).append("]").toString();
     }
+
+    /**
+     * Override to produce hash code depending on file name
+     *
+     * @return a hash code value for this object.
+     */
+    public int hashCode() {
+        return toString().hashCode();
+    }
+
+    /**
+     * Override to equal other SkinFile with the same source name
+     *
+     * @param obj the object to compare to
+     * @return true if obj is a SkinFile with the same source name
+     */
+    public boolean equals(Object obj) {
+        return (obj instanceof SkinFile) &&
+                toString().equals(obj.toString());
+    }
+
 }

src/helma/scripting/ActionFile.java

@@ -189,4 +189,25 @@ public class ActionFile implements Updatable {
     public String toString() {
         return "ActionFile[" + sourceName + "]";
     }
+
+    /**
+     * Override to produce hash code depending on source name
+     *
+     * @return a hash code value for this object.
+     */
+    public int hashCode() {
+        return sourceName.hashCode();
+    }
+
+    /**
+     * Override to equal other ActionFile with the same source name
+     *
+     * @param obj the object to compare to
+     * @return true if obj is a ActionFile with the same source name
+     */
+    public boolean equals(Object obj) {
+        return (obj instanceof ActionFile) &&
+                sourceName.equals(((ActionFile) obj).getSourceName());
+    }
+
 }

src/helma/scripting/FunctionFile.java

@@ -123,4 +123,24 @@ public class FunctionFile implements Updatable {
     public String toString() {
         return sourceName;
     }
+
+    /**
+     * Override to produce hash code depending on source name
+     *
+     * @return a hash code value for this object.
+     */
+    public int hashCode() {
+        return sourceName.hashCode();
+    }
+
+    /**
+     * Override to equal other FunctionFiles with the same source name
+     *
+     * @param obj the object to compare to
+     * @return true if obj is a FunctionFile with the same source name
+     */
+    public boolean equals(Object obj) {
+        return (obj instanceof FunctionFile) &&
+                sourceName.equals(((FunctionFile) obj).getSourceName());
+    }
 }

src/helma/scripting/Template.java

@@ -235,4 +235,25 @@ public class Template extends ActionFile {
             return "Template.Part [" + content + "," + isStatic + "]";
         }
     }
+
+    /**
+     * Override to produce hash code depending on source name
+     *
+     * @return a hash code value for this object.
+     */
+    public int hashCode() {
+        return sourceName.hashCode();
+    }
+
+    /**
+     * Override to equal other Template with the same source name
+     *
+     * @param obj the object to compare to
+     * @return true if obj is a Template with the same source name
+     */
+    public boolean equals(Object obj) {
+        return (obj instanceof Template) &&
+                sourceName.equals(((Template) obj).getSourceName());
+    }
+
 }