Add XPathMapper, useful for mapping XML file data into Solr

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@525033 13f79535-47bb-0310-9956-ffa450edef68

client/ruby/solr-ruby/lib/solr/importer.rb

@@ -13,3 +13,4 @@
 module Solr; module Importer; end; end
 require 'solr/importer/mapper'
 require 'solr/importer/tab_delimited_file_source'
+require 'solr/importer/xpath_mapper'

client/ruby/solr-ruby/lib/solr/importer/xpath_mapper.rb

@@ -0,0 +1,27 @@
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'xml/libxml'
+
+# For files with the first line containing field names
+class Solr::Importer::XPathMapper < Solr::Importer::Mapper
+  def field_data(doc, xpath)
+    doc.find(xpath.to_s).collect do |node|
+      case node
+        when XML::Attr
+          node.value
+        when XML::Node
+          node.content
+      end
+    end
+  end
+end

client/ruby/solr-ruby/test/unit/xpath_mapper_test.rb

@@ -0,0 +1,33 @@
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'solr'
+require 'test/unit'
+
+class XPathMapperTest < Test::Unit::TestCase
+  
+  def setup
+    @doc = XML::Document.file(File.expand_path(File.dirname(__FILE__)) + "/xpath_test_file.xml")
+  end
+
+  def test_simple_xpath
+    mapping = {:solr_field1 => :'/root/parent/child',
+               :solr_field2 => :'/root/parent/child/@attribute'}    
+    
+    mapper = Solr::Importer::XPathMapper.new(mapping)    
+    mapped_data = mapper.map(@doc)
+        
+    assert_equal ['text1', 'text2'], mapped_data[:solr_field1]
+    assert_equal ['attribute1', 'attribute2'], mapped_data[:solr_field2]
+  end
+
+end

client/ruby/solr-ruby/test/unit/xpath_test_file.xml

@@ -0,0 +1,6 @@
+<root>
+  <parent>
+    <child attribute="attribute1">text1</child>
+    <child attribute="attribute2">text2</child>
+  </parent>
+</root>