svn commit: r1630709 - /oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java

[bf...@apache.org]

Author: bfoster
Date: Fri Oct 10 08:02:40 2014
New Revision: 1630709

URL: http://svn.apache.org/r1630709
Log:
- Allow for pushpull fileretriction parsered metadata to be used in renaming convention
-----------
OODT-760

Added:
    oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java   (with props)

Added: oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java
URL: http://svn.apache.org/viewvc/oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java?rev=1630709&view=auto
==============================================================================
--- oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java (added)
+++ oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java Fri Oct 10 08:02:40 2014
@@ -0,0 +1,78 @@
+package org.apache.oodt.cas.metadata.extractors;
+
+import java.io.File;
+import java.util.List;
+
+import org.apache.oodt.cas.metadata.Metadata;
+import org.apache.oodt.cas.metadata.exceptions.MetExtractionException;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Lists;
+
+/**
+ * Supports data source key look via parent key if files key is no good.
+ * 
+ * Expected file name:
+ * <parent_key>-<primary_key>.<post_fix>
+ * 
+ * @author bfoster@apache.com (Brian Foster)
+ */
+public class ParentKeyDataSourceMetExtractor extends DataSourceMetExtractor {
+
+  private String key;
+  
+  @Override
+  protected Metadata extrMetadata(File file) throws MetExtractionException {
+    try {
+      key = getPrimaryKey(file);
+      return extrMetadata(file);
+    } catch (MetExtractionException e) {
+      key = getParentKey(file);
+      if (key != null) {
+        return extrMetadata(file);
+      } else {
+        throw e;
+      }
+    }
+  }
+
+  @VisibleForTesting
+  protected String getKey(File file) {
+    return key;
+  }
+
+  private String getPrimaryKey(File file) {
+    String key = getKeyAtIndex(file, Index.PRIMARY);
+    return key == null ? super.getKey(file) : key;
+  }
+
+  private String getParentKey(File file) {
+    return getKeyAtIndex(file, Index.PARENT);
+  }
+
+  private String getKeyAtIndex(File file, Index index) {
+    String key = super.getKey(file);
+    List<String> splitKey = Lists.newArrayList(Splitter.on("-").split(key));
+    if (splitKey.size() == 2) {
+      return splitKey.get(index.getNumeric());
+    } else {
+      return null;
+    }
+  }
+
+  private enum Index {
+    PRIMARY(1),
+    PARENT(0);
+    
+    private int index;
+
+    Index(int index) {
+      this.index = index;
+    }
+
+    public int getNumeric() {
+      return index;
+    }
+  }
+}

Propchange: oodt/trunk/metadata/src/main/java/org/apache/oodt/cas/metadata/extractors/ParentKeyDataSourceMetExtractor.java
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