Introduce mbox support

[gpl/argeo-slc.git] / ext / javax.mail.mbox / src / com / sun / mail / mbox / UNIXInbox.java

diff --git a/ext/javax.mail.mbox/src/com/sun/mail/mbox/UNIXInbox.java b/ext/javax.mail.mbox/src/com/sun/mail/mbox/UNIXInbox.java
new file mode 100644 (file)
index 0000000..70ce865
--- /dev/null
+++ b/ext/javax.mail.mbox/src/com/sun/mail/mbox/UNIXInbox.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package com.sun.mail.mbox;
+
+import java.io.*;
+
+public class UNIXInbox extends UNIXFolder implements InboxFile {
+    private final String user;
+
+    private static final long serialVersionUID = 651261842162777620L;
+
+    /*
+     * Superclass UNIXFile loads the library containing all the
+     * native code and sets the "loaded" flag if successful.
+     */
+
+    public UNIXInbox(String user, String name) {
+       super(name);
+       this.user = user;
+       if (user == null)
+           throw new NullPointerException("user name is null in UNIXInbox");
+    }
+
+    public boolean lock(String mode) {
+       if (lockType == NATIVE) {
+           if (!loaded)
+               return false;
+           if (!maillock(user, 5))
+               return false;
+       }
+       if (!super.lock(mode)) {
+           if (loaded)
+               mailunlock();
+           return false;
+       }
+       return true;
+    }
+
+    public void unlock() { 
+       super.unlock();
+       if (loaded)
+           mailunlock();
+    }
+
+    public void touchlock() {
+       if (loaded)
+           touchlock0();
+    }
+
+    private transient RandomAccessFile lockfile; // the user's ~/.Maillock file
+    private transient String lockfileName;     // its name
+
+    public boolean openLock(String mode) {
+       if (mode.equals("r"))
+           return true;
+       if (lockfileName == null) {
+           String home = System.getProperty("user.home");
+           lockfileName = home + File.separator + ".Maillock";
+       }
+       try {
+           lockfile = new RandomAccessFile(lockfileName, mode);
+           boolean ret;
+           switch (lockType) {
+           case NONE:
+               ret = true;
+               break;
+           case NATIVE:
+           default:
+               ret = UNIXFile.lock(lockfile.getFD(), mode);
+               break;
+           case JAVA:
+               ret = lockfile.getChannel().
+                   tryLock(0L, Long.MAX_VALUE, !mode.equals("rw")) != null;
+               break;
+           }
+           if (!ret)
+               closeLock();
+           return ret;
+       } catch (IOException ex) {
+       }
+       return false;
+    }
+
+    public void closeLock() {
+       if (lockfile == null)
+           return;
+       try {
+           lockfile.close();
+       } catch (IOException ex) {
+       } finally {
+           lockfile = null;
+       }
+    }
+
+    public boolean equals(Object o) {
+       if (!(o instanceof UNIXInbox))
+           return false;
+       UNIXInbox other = (UNIXInbox)o;
+       return user.equals(other.user) && super.equals(other);
+    }
+
+    public int hashCode() {
+       return super.hashCode() + user.hashCode();
+    }
+
+    private native boolean maillock(String user, int retryCount);
+    private native void mailunlock();
+    private native void touchlock0();
+}