Merge pull request #78 from adam-m/master

java bindings add getUniquePath() to FsContent

bindings/java/src/org/sleuthkit/datamodel/FsContent.java

@@ -20,6 +20,7 @@
 
 import java.util.Collections;
 import java.util.List;
+import java.util.StringTokenizer;
 import org.sleuthkit.datamodel.TskData.FileKnown;
 
 /**
@@ -39,6 +40,11 @@ public abstract class FsContent extends AbstractFile {
 	 */
 	protected String parent_path;
 	
+	/*
+	 * Unique path containing image and volume
+	 */
+	protected String unique_path;
+	
 	/*
 	 * md5 hash
 	 */
@@ -389,6 +395,44 @@ public String getParentPath() {
 		return this.parent_path;
 	}
 	
+	/**
+	 * Get the absolute unique across all files in the case 
+	 * parent path string of this FsContent
+	 * The path contains image and volume-system partition
+	 * After first call, every subsequent call returns the cached string
+	 * @return unique absolute file path (cached after first call)
+	 * @throws TskCoreException thrown when critical error occurred in Tsk Core
+	 * and unique absolute path could not be queried
+	 */
+	public String getUniquePath() throws TskCoreException {
+		if (unique_path != null) {
+			return unique_path;
+		}
+		
+		StringBuilder sb = new StringBuilder();
+		//prepend image and volume to file path
+		Image image = this.getImage();
+		StringTokenizer tok = new StringTokenizer(image.getName(), "/\\");
+		String imageName = null;
+		while (tok.hasMoreTokens()) {
+			imageName = tok.nextToken();
+		}
+		sb.append("/").append(imageName);
+		if (parentFileSystem != null) {
+			Content vol = parentFileSystem.getParent();
+			if (vol != null 
+					&& ! vol.equals(image)) {
+				sb.append("/");
+				sb.append(vol.getName());
+			}
+		}
+		
+		sb.append(getParentPath());
+		
+		unique_path = sb.toString();
+		return unique_path;
+	}
+	
 	/**
 	 * Get the md5 hash value as calculated, if present
 	 *