Added a JsonFormatter to indent JSON output using the new Formatter support introduced by @skuppa in

a90aa7f

Author: Jon Brisbin

src/main/java/org/springframework/data/rest/shell/formatter/FormatProvider.java

@@ -8,14 +8,15 @@
 @Component
 public class FormatProvider {
   private final Collection<Formatter> availableFormatter = new ArrayList<Formatter>();
-  private final NoOpFormatter noOpFormatter = new NoOpFormatter();
+  private final NoOpFormatter         noOpFormatter      = new NoOpFormatter();
 
   public FormatProvider() {
     availableFormatter.add(new XmlFormatter());
+    availableFormatter.add(new JsonFormatter());
   }
 
   public Formatter getFormatter(String contentType) {
-    for (Formatter formatter : availableFormatter) {
+    for(Formatter formatter : availableFormatter) {
       if(formatter.isSupported(contentType)) {
         return formatter;
       }

src/main/java/org/springframework/data/rest/shell/formatter/JsonFormatter.java

@@ -0,0 +1,43 @@
+package org.springframework.data.rest.shell.formatter;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+import org.codehaus.jackson.map.ObjectMapper;
+import org.codehaus.jackson.map.SerializationConfig;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+
+/**
+ * @author Jon Brisbin
+ */
+public class JsonFormatter extends FormatterSupport {
+
+  private static final List<String> SUPPORTED = Arrays.asList("json");
+  private final        ObjectMapper mapper    = new ObjectMapper();
+
+  {
+    mapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true);
+  }
+
+  @Override public Collection<String> getSupportedList() {
+    return SUPPORTED;
+  }
+
+  @Override public String format(String nonFormattedString) {
+    Object obj;
+    try {
+      if(nonFormattedString.startsWith("[")) {
+        obj = mapper.readValue(nonFormattedString.getBytes(), List.class);
+      } else {
+        obj = mapper.readValue(nonFormattedString.getBytes(), Map.class);
+      }
+      return mapper.writeValueAsString(obj);
+    } catch(IOException e) {
+      throw new HttpMessageNotReadableException(e.getMessage(), e);
+    }
+  }
+
+}