1 files changed, 69 insertions, 0 deletions
diff --git a/vespa-hadoop/src/main/java/com/yahoo/vespa/hadoop/mapreduce/util/TupleTools.java b/vespa-hadoop/src/main/java/com/yahoo/vespa/hadoop/mapreduce/util/TupleTools.java
new file mode 100644
index 00000000000..1d11a3f9fdd
--- /dev/null
+++ b/vespa-hadoop/src/main/java/com/yahoo/vespa/hadoop/mapreduce/util/TupleTools.java
@@ -0,0 +1,69 @@
+package com.yahoo.vespa.hadoop.mapreduce.util;
+
+import org.apache.pig.ResourceSchema;
+import org.apache.pig.data.Tuple;
+import org.apache.pig.impl.logicalLayer.schema.Schema;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class TupleTools {
+
+    private static final Pattern pattern = Pattern.compile("<([\\w]+)>");
+
+    public static Map<String, Object> tupleMap(Schema schema, Tuple tuple) throws IOException {
+        Map<String, Object> tupleMap = new HashMap<>((int)Math.ceil(tuple.size() / 0.75) + 1);
+        List<Schema.FieldSchema> schemas = schema.getFields();
+        for (int i = 0; i < schemas.size(); i++) {
+            Schema.FieldSchema field = schemas.get(i);
+            String alias = field.alias;
+            Object value = tuple.get(i);
+            if (value != null) {
+                tupleMap.put(alias, value);
+            }
+        }
+        return tupleMap;
+    }
+
+    public static Map<String, Object> tupleMap(ResourceSchema schema, Tuple tuple) throws IOException {
+        Map<String, Object> tupleMap = new HashMap<>((int)Math.ceil(tuple.size() / 0.75) + 1);
+        ResourceSchema.ResourceFieldSchema[] schemas = schema.getFields();
+        for (int i = 0; i < schemas.length; i++) {
+            ResourceSchema.ResourceFieldSchema field = schemas[i];
+            String alias = field.getName();
+            Object value = tuple.get(i);
+            if (value != null) {
+                tupleMap.put(alias, value);
+            }
+        }
+        return tupleMap;
+    }
+
+    public static String toString(Schema schema, Tuple tuple, String template) throws IOException {
+        return toString(tupleMap(schema, tuple), template);
+    }
+
+    public static String toString(Map<String,Object> fields, String template) {
+        if (template == null || template.length() == 0) {
+            return template;
+        }
+        if (fields == null || fields.size() == 0) {
+            return template;
+        }
+
+        Matcher m = pattern.matcher(template);
+        StringBuffer sb = new StringBuffer();
+        while (m.find()) {
+            Object value = fields.get(m.group(1));
+            String replacement = value != null ? value.toString() : m.group(0);
+            m.appendReplacement(sb, Matcher.quoteReplacement(replacement));
+        }
+        m.appendTail(sb);
+        return sb.toString();
+    }
+
+}