Improved conversions.

json-path/src/main/java/com/jayway/jsonpath/JsonModel.java

@@ -122,6 +122,10 @@ public class JsonModel {
         return jsonProvider.isMap(jsonObject);
     }
 
+    public void print(){
+        System.out.println(toJson());
+    }
+
     /**
      * Check if this JsonModel has the given definite path
      *
@@ -705,6 +709,13 @@ public class JsonModel {
          */
         Double getDouble(String key);
 
+        /**
+         * Tries to convert the value associated with the key to an {@link String}
+         * @param key the key
+         * @return converted value
+         */
+        String getString(String key);
+
         /**
          * @see Map#putAll(java.util.Map)
          */
@@ -777,6 +788,9 @@ public class JsonModel {
          * @return this {@link ArrayOps}
          */
         ArrayOps transform(Transformer<List<Object>> transformer);
+        
+        
+        ArrayOps each(Transformer<Object> transformer);
 
         /**
          * @see ListMappingModelReader
@@ -847,6 +861,11 @@ public class JsonModel {
             return ConvertUtils.toDouble(get(key));
         }
 
+        @Override
+        public String getString(String key) {
+            return ConvertUtils.toString(get(key));
+        }
+
         @Override
         public ObjectOps putAll(Map<String, Object> map) {
             getTargetObject(jsonPath, Map.class).putAll(map);
@@ -929,6 +948,16 @@ public class JsonModel {
             return this;
         }
 
+        @Override
+        public ArrayOps each(Transformer<Object> transformer) {
+
+            List targetObject = getTargetObject(jsonPath, List.class);
+            for(int i = 0; i < targetObject.size(); i++){
+                targetObject.set(i, transformer.transform(targetObject.get(i)));
+            }
+            return this;
+        }
+
         @Override
         public <T> List<T> toListOf(Class<T> targetClass) {
             return new DefaultMappingModelReader(getTargetObject(jsonPath, List.class)).toListOf(targetClass);

json-path/src/main/java/com/jayway/jsonpath/internal/ConvertUtils.java

@@ -75,4 +75,12 @@ public class ConvertUtils {
             throw new InvalidConversionException("Could not convert " + o.toString() + " to Double");
         }
     }
+
+    public static String toString(Object o) {
+        if(null == o){
+            return null;
+        }
+
+        return o.toString();
+    }
 }

json-path/src/test/java/com/jayway/jsonpath/JsonModelChainedCallsTest.java

@@ -0,0 +1,103 @@
+package com.jayway.jsonpath;
+
+import org.junit.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static junit.framework.Assert.assertEquals;
+
+/**
+ * Created by IntelliJ IDEA.
+ * User: kallestenflo
+ * Date: 3/14/12
+ * Time: 7:30 AM
+ */
+public class JsonModelChainedCallsTest {
+    
+    public final static String DOCUMENT =
+            "{ \"store\": {\n" +
+                    "    \"book\": [ \n" +
+                    "      { \"category\": \"reference\",\n" +
+                    "        \"author\": \"Nigel Rees\",\n" +
+                    "        \"title\": \"Sayings of the Century\",\n" +
+                    "        \"price\": 8.95\n" +
+                    "      },\n" +
+                    "      { \"category\": \"fiction\",\n" +
+                    "        \"author\": \"Evelyn Waugh\",\n" +
+                    "        \"title\": \"Sword of Honour\",\n" +
+                    "        \"price\": 12.99\n" +
+                    "      },\n" +
+                    "      { \"category\": \"fiction\",\n" +
+                    "        \"author\": \"Herman Melville\",\n" +
+                    "        \"title\": \"Moby Dick\",\n" +
+                    "        \"isbn\": \"0-553-21311-3\",\n" +
+                    "        \"price\": 8.99\n" +
+                    "      },\n" +
+                    "      { \"category\": \"fiction\",\n" +
+                    "        \"author\": \"J. R. R. Tolkien\",\n" +
+                    "        \"title\": \"The Lord of the Rings\",\n" +
+                    "        \"isbn\": \"0-395-19395-8\",\n" +
+                    "        \"price\": 22.99\n" +
+                    "      }\n" +
+                    "    ],\n" +
+                    "    \"bicycle\": {\n" +
+                    "      \"color\": \"red\",\n" +
+                    "      \"price\": 19.95,\n" +
+                    "      \"foo:bar\": \"fooBar\",\n" +
+                    "      \"number\": 12,\n" +
+                    "      \"dot.notation\": \"new\"\n" +
+                    "    }\n" +
+                    "  }\n" +
+                    "}";
+    
+    
+    @Test
+    public void convert_and_map() throws Exception {
+     
+        JsonModel model = JsonModel.model(DOCUMENT);
+        
+        Transformer<Map<String, Object>> transformer = new Transformer<Map<String, Object>>() {
+            @Override
+            public Object transform(Map<String, Object> map) {
+                map.remove("isbn");
+                map.put("author", "kalle");
+                return map;
+            }
+        };
+
+        Book book = model.opsForObject("store.book[0]").transform(transformer).to(Book.class);
+
+        assertEquals(book.author, "kalle");
+    }
+    
+        
+    @Test
+    public void convert_each_and_map() throws Exception {
+     
+        JsonModel model = JsonModel.model(DOCUMENT);
+        
+        Transformer<Object> transformer = new Transformer<Object>() {
+            @Override
+            public Object transform(Object obj) {
+                Map<String, Object> map = (Map<String, Object>) obj;
+                map.remove("isbn");
+                map.put("author", "kalle");
+                return map;
+            }
+        };
+
+        List<Book> books = model.opsForArray("store.book").each(transformer).toList().of(Book.class);
+
+        System.out.println();
+    }
+    
+    
+    public static class Book {
+        public String category;
+        public String author;
+        public String title;
+        public Double price;
+    }
+    
+}