[Bugfix] Populate table name from the identifier in Iceberge conversion

What is the problem?
While converting the iceberg table to other format such as Hudi,
the icerberg source table do not populate the table name. This is
due to iceberg table's behavior as it is treated as Hadoop tables.
This leads to table identified as table-location, leading to confusing
conversation.

Solution:
This commit handles the conversation logic, when icebege table manager
provides HadoopTable, it populate the table name from provided input
TableIdentifier. This ensures that source table name is carried over
to the transformation.

Testing:
- Added unit test to cover this scenario.

Co-authored-by: Tim Brown <[email protected]>

Author: jalpan-randeri

xtable-core/src/main/java/org/apache/xtable/iceberg/IcebergConversionSource.java

@@ -120,10 +120,18 @@ public InternalTable getTable(Snapshot snapshot) {
         irPartitionFields.size() > 0
             ? DataLayoutStrategy.HIVE_STYLE_PARTITION
             : DataLayoutStrategy.FLAT;
+    // When the table name is not explicitly specified, Iceberg assumes the table is HDFS-based,
+    // treating the table name as the location in HDFS. This assumption can lead to mismatches
+    // during metadata conversion. To mitigate this issue, we rely on the table name provided in the
+    // source configuration of the conversation so target matches the user's expectations.
+    // See https://github.com/apache/incubator-xtable/issues/494
     return InternalTable.builder()
         .tableFormat(TableFormat.ICEBERG)
         .basePath(iceTable.location())
-        .name(iceTable.name())
+        .name(
+            iceTable.name().contains(iceTable.location())
+                ? sourceTableConfig.getName()
+                : iceTable.name())
         .partitioningFields(irPartitionFields)
         .latestCommitTime(Instant.ofEpochMilli(snapshot.timestampMillis()))
         .readSchema(irSchema)

xtable-core/src/test/java/org/apache/xtable/iceberg/ITIcebergConversionSource.java

@@ -126,7 +126,7 @@ void getCurrentTableTest() {
               .build();
       validateTable(
           internalTable,
-          testIcebergTable.getBasePath(),
+          testIcebergTable.getTableName(),
           TableFormat.ICEBERG,
           internalSchema,
           DataLayoutStrategy.FLAT,