1 files changed, 74 insertions, 0 deletions
diff --git a/nouveau/src/main/java/org/apache/couchdb/nouveau/resources/AnalyzeResource.java b/nouveau/src/main/java/org/apache/couchdb/nouveau/resources/AnalyzeResource.java
new file mode 100644
index 000000000..e29657eab
--- /dev/null
+++ b/nouveau/src/main/java/org/apache/couchdb/nouveau/resources/AnalyzeResource.java
@@ -0,0 +1,74 @@
+//
+// Licensed 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.
+
+package org.apache.couchdb.nouveau.resources;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.couchdb.nouveau.api.AnalyzeRequest;
+import org.apache.couchdb.nouveau.api.AnalyzeResponse;
+import org.apache.couchdb.nouveau.lucene9.Lucene9AnalyzerFactory;
+import org.apache.lucene.analysis.Analyzer;
+import org.apache.lucene.analysis.TokenStream;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+
+import com.codahale.metrics.annotation.ExceptionMetered;
+import com.codahale.metrics.annotation.Metered;
+import com.codahale.metrics.annotation.ResponseMetered;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotNull;
+import jakarta.ws.rs.Consumes;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.WebApplicationException;
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.Response.Status;
+
+@Path("/analyze")
+@Metered
+@ResponseMetered
+@ExceptionMetered(cause = IOException.class)
+@Consumes(MediaType.APPLICATION_JSON)
+@Produces(MediaType.APPLICATION_JSON)
+public final class AnalyzeResource {
+
+    @POST
+    public AnalyzeResponse analyzeText(@NotNull @Valid AnalyzeRequest request) throws IOException {
+        try {
+            final List<String> tokens = tokenize(Lucene9AnalyzerFactory.newAnalyzer(request.getAnalyzer()),
+                    request.getText());
+            return new AnalyzeResponse(tokens);
+        } catch (IllegalArgumentException e) {
+            throw new WebApplicationException(request.getAnalyzer() + " not a valid analyzer",
+                    Status.BAD_REQUEST);
+        }
+    }
+
+    private List<String> tokenize(final Analyzer analyzer, final String text) throws IOException {
+        final List<String> result = new ArrayList<String>(10);
+        try (final TokenStream tokenStream = analyzer.tokenStream("default", text)) {
+            tokenStream.reset();
+            while (tokenStream.incrementToken()) {
+                final CharTermAttribute term = tokenStream.getAttribute(CharTermAttribute.class);
+                result.add(term.toString());
+            }
+            tokenStream.end();
+        }
+        return result;
+    }
+
+}