initial check-in, handles zipped app files

src/helma/framework/core/ZippedAppFile.java

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+// ZippedFile.java
+// Copyright (c) Hannes Wallnöfer 2001
+ 
+package helma.framework.core;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.io.*;
+import helma.framework.*;
+import helma.util.Updatable;
+
+
+
+/**
+ * This represents a Zip-File which may contain other Updatables for one or more prototypes.
+ */
+
+
+public class ZippedAppFile implements Updatable {
+
+    Application app;
+    File file;
+    long lastmod;
+
+
+    public ZippedAppFile (File file, Application app) {
+	this.app = app;
+	this.file = file;
+	System.err.println ("CREATING ZIP FILE "+this);
+    }
+
+
+    /**
+     * Tell the type manager whether we need an update. this is the case when
+     * the file has been modified or deleted.
+     */
+    public boolean needsUpdate () {
+	return lastmod != file.lastModified () || !file.exists ();
+    }
+
+
+    public void update () {
+
+	if (!file.exists ()) {
+	    remove ();
+
+	} else {
+
+	    lastmod = file.lastModified ();
+	    System.err.println ("UPDATING ZIP FILE "+this);
+
+	}
+
+    }
+
+    void remove () {
+	app.typemgr.zipfiles.remove (file.getName());
+	System.err.println ("REMOVING ZIP FILE "+this);
+    }
+
+
+    public String toString () {
+	return file.getName();
+    }
+
+
+}
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