From a140b73e9761b7bc53b6b801648bb03c2f5824a9 Mon Sep 17 00:00:00 2001
From: jprocter <jprocter@compbio.dundee.ac.uk>
Date: Fri, 17 Aug 2007 13:52:40 +0000
Subject: [PATCH] new method to test if a particular file is or is related to
 the target of a lock

git-svn-id: https://svn.lifesci.dundee.ac.uk/svn/repository/trunk@432 be28352e-c001-0410-b1a7-c7978e42abec
---
 src/uk/ac/vamsas/client/simpleclient/FileLock.java  |   19 +++++++++++++++++--
 src/uk/ac/vamsas/client/simpleclient/Lock.java      |    7 +++++++
 .../ac/vamsas/client/simpleclient/NativeLock.java   |    6 ++++++
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/src/uk/ac/vamsas/client/simpleclient/FileLock.java b/src/uk/ac/vamsas/client/simpleclient/FileLock.java
index 9201702..40ee9cf 100644
--- a/src/uk/ac/vamsas/client/simpleclient/FileLock.java
+++ b/src/uk/ac/vamsas/client/simpleclient/FileLock.java
@@ -64,7 +64,7 @@ public class FileLock extends Lock {
     super(lockfile);
     // try and get a lock.
     try {
-      _lock = new File(lockfile.getParentFile(), lockfile.getName()+"."+_LockSuffix);
+      _lock = make_lockForTarget(lockfile);
       if (!ensureLockFile(block)) {
         log.debug("Couldn't get lock on "+_lock);
         tidy();
@@ -87,7 +87,14 @@ public class FileLock extends Lock {
           + lockfile.getAbsolutePath(),e);
     }
   }
-  
+  /**
+   * 
+   * @param lockfile target of lock
+   * @return file object that will be locked for lockfile
+   */
+  private File make_lockForTarget(File lockfile) {
+    return new File(lockfile.getParentFile(), lockfile.getName()+"."+_LockSuffix);
+  }
   private boolean openRaFile() throws IOException {
     if (target==null)
       return false;
@@ -208,4 +215,12 @@ public class FileLock extends Lock {
     log.debug("Failed to getRaChannel on target "+target);
     return null;
   }
+  public boolean isTargetLockFile(File afile) {
+    if (isLocked())
+    {
+      if (target.equals(afile) || make_lockForTarget(target).equals(afile))
+        return true;
+    }
+    return false;
+  }
 }
diff --git a/src/uk/ac/vamsas/client/simpleclient/Lock.java b/src/uk/ac/vamsas/client/simpleclient/Lock.java
index a124745..bd968fb 100644
--- a/src/uk/ac/vamsas/client/simpleclient/Lock.java
+++ b/src/uk/ac/vamsas/client/simpleclient/Lock.java
@@ -34,6 +34,13 @@ public abstract class Lock {
     target = lockfile;
   }
   /**
+   * test whether the given file is a target or related to the lock
+   * on the target file.
+   * @param afile a file
+   * @return true if target is locked and afile is related to target
+   */
+  public abstract boolean isTargetLockFile(File afile);
+  /**
    * 
    * @return true if lock is held on the target
    */
diff --git a/src/uk/ac/vamsas/client/simpleclient/NativeLock.java b/src/uk/ac/vamsas/client/simpleclient/NativeLock.java
index f980f45..ccaa407 100644
--- a/src/uk/ac/vamsas/client/simpleclient/NativeLock.java
+++ b/src/uk/ac/vamsas/client/simpleclient/NativeLock.java
@@ -172,4 +172,10 @@ public class NativeLock extends Lock {
     return null;
   }
 
+  public boolean isTargetLockFile(File afile) {
+    if (isLocked() && target.equals(afile))
+      return true;
+    return false;
+  }
+
 }
-- 
1.7.10.2