1 files changed, 59 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/debug/OutputSearchChain.java b/container-search/src/main/java/com/yahoo/search/debug/OutputSearchChain.java
new file mode 100644
index 00000000000..4413ea462c8
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/search/debug/OutputSearchChain.java
@@ -0,0 +1,59 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.debug;
+
+import static com.yahoo.protect.Validator.ensureNotNull;
+
+import com.yahoo.jrt.Request;
+import com.yahoo.jrt.StringValue;
+import com.yahoo.jrt.Value;
+import com.yahoo.yolean.Exceptions;
+import com.yahoo.search.handler.SearchHandler;
+import com.yahoo.search.searchchain.SearchChain;
+import com.yahoo.search.searchchain.SearchChainRegistry;
+
+/**
+ * Outputs a human readable representation of a given search chain.
+ *
+ * @author tonytv
+ */
+final class OutputSearchChain implements DebugMethodHandler {
+      private String getSearchChainName(Request request) {
+        final int numParameters = request.parameters().size();
+
+        if (numParameters == 0)
+            return SearchHandler.defaultSearchChainName;
+        else if (numParameters == 1)
+            return request.parameters().get(0).asString();
+        else
+            throw new RuntimeException("Too many parameters given.");
+    }
+
+    private SearchChain getSearchChain(SearchChainRegistry registry, String searchChainName) {
+        SearchChain searchChain = registry.getComponent(searchChainName);
+        ensureNotNull("There is no search chain named '" + searchChainName + "'", searchChain);
+        return searchChain;
+    }
+
+    public JrtMethodSignature getSignature() {
+        String returnTypes = "" + (char)Value.STRING;
+        String parametersTypes = "*"; //optional string
+        return new JrtMethodSignature(returnTypes, parametersTypes);
+    }
+
+    public void invoke(Request request) {
+        try {
+            SearchHandler searchHandler = SearcherUtils.getSearchHandler();
+            SearchChainRegistry searchChainRegistry = searchHandler.getSearchChainRegistry();
+            SearchChain searchChain = getSearchChain(searchChainRegistry,
+                    getSearchChainName(request));
+
+            SearchChainTextRepresentation textRepresentation = new SearchChainTextRepresentation(searchChain, searchChainRegistry);
+            request.returnValues().add(new StringValue(textRepresentation.toString()));
+        } catch (Exception e) {
+            request.setError(1000, Exceptions.toMessageString(e));
+        }
+    }
+
+
+}
+