diff --git a/json-path/src/main/java/com/jayway/jsonpath/Configuration.java b/json-path/src/main/java/com/jayway/jsonpath/Configuration.java
index df353203..b60ca78a 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/Configuration.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/Configuration.java
@@ -69,29 +69,29 @@ public class Configuration {
     }
 
     public Configuration jsonProvider(JsonProvider newJsonProvider) {
-        return Configuration.builder().jsonProvider(newJsonProvider).conversionProvider(mappingProvider).options(options).build();
+        return Configuration.builder().jsonProvider(newJsonProvider).mappingProvider(mappingProvider).options(options).build();
     }
 
     public JsonProvider jsonProvider() {
         return jsonProvider;
     }
 
-    public MappingProvider conversionProvider() {
+    public MappingProvider mappingProvider() {
         return mappingProvider;
     }
 
-    public Configuration conversionProvider(MappingProvider newMappingProvider) {
-        return Configuration.builder().jsonProvider(jsonProvider).conversionProvider(newMappingProvider).options(options).build();
+    public Configuration mappingProvider(MappingProvider newMappingProvider) {
+        return Configuration.builder().jsonProvider(jsonProvider).mappingProvider(newMappingProvider).options(options).build();
     }
 
     public Configuration addOptions(Option... options) {
         EnumSet<Option> opts = EnumSet.noneOf(Option.class);
         opts.addAll(this.options);
         opts.addAll(asList(options));
-        return Configuration.builder().jsonProvider(jsonProvider).conversionProvider(mappingProvider).options(opts).build();
+        return Configuration.builder().jsonProvider(jsonProvider).mappingProvider(mappingProvider).options(opts).build();
     }
     public Configuration options(Option... options) {
-        return Configuration.builder().jsonProvider(jsonProvider).conversionProvider(mappingProvider).options(options).build();
+        return Configuration.builder().jsonProvider(jsonProvider).mappingProvider(mappingProvider).options(options).build();
     }
 
     public Set<Option> getOptions() {
@@ -122,7 +122,7 @@ public class Configuration {
             return this;
         }
 
-        public ConfigurationBuilder conversionProvider(MappingProvider provider) {
+        public ConfigurationBuilder mappingProvider(MappingProvider provider) {
             this.mappingProvider = provider;
             return this;
         }
@@ -164,8 +164,9 @@ public class Configuration {
         Set<Option> options();
 
         /**
+         * Returns the default {@link com.jayway.jsonpath.spi.mapper.MappingProvider}
          *
-         * @return
+         * @return default mapping provider
          */
         MappingProvider mappingProvider();
 
diff --git a/json-path/src/main/java/com/jayway/jsonpath/Criteria.java b/json-path/src/main/java/com/jayway/jsonpath/Criteria.java
index adca5392..b1ad6fd0 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/Criteria.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/Criteria.java
@@ -195,7 +195,7 @@ public class Criteria implements Predicate {
             @Override
             boolean eval(Object expected, final Object actual, final PredicateContext ctx) {
                 Predicate exp = (Predicate) expected;
-                return exp.apply(new PredicateContextImpl(actual, ctx.rootDocument(), ctx.configuration()));
+                return exp.apply(new PredicateContextImpl(actual, ctx.root(), ctx.configuration()));
             }
         },
         NOT_EMPTY {
@@ -273,20 +273,20 @@ public class Criteria implements Predicate {
             boolean exists = ((Boolean) expected);
             try {
                 Configuration c = Configuration.builder().jsonProvider(ctx.configuration().jsonProvider()).options().build();
-                path.evaluate(ctx.contextDocument(), ctx.rootDocument(), c).getValue();
+                path.evaluate(ctx.item(), ctx.root(), c).getValue();
                 return exists;
             } catch (PathNotFoundException e) {
                 return !exists;
             }
         } else {
             try {
-                final Object actual = path.evaluate(ctx.contextDocument(), ctx.rootDocument(), ctx.configuration()).getValue();
+                final Object actual = path.evaluate(ctx.item(), ctx.root(), ctx.configuration()).getValue();
 
                 Object expectedVal = expected;
                 if(expected instanceof Path){
                     Path expectedPath = (Path) expected;
-                    Object doc = expectedPath.isRootPath()?ctx.rootDocument():ctx.contextDocument();
-                    expectedVal = expectedPath.evaluate(doc, ctx.rootDocument(), ctx.configuration()).getValue();
+                    Object doc = expectedPath.isRootPath()?ctx.root():ctx.item();
+                    expectedVal = expectedPath.evaluate(doc, ctx.root(), ctx.configuration()).getValue();
                 }
 
                 return criteriaType.eval(expectedVal, actual, ctx);
diff --git a/json-path/src/main/java/com/jayway/jsonpath/Predicate.java b/json-path/src/main/java/com/jayway/jsonpath/Predicate.java
index 5eeebd1c..be1bff15 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/Predicate.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/Predicate.java
@@ -1,5 +1,7 @@
 package com.jayway.jsonpath;
 
+import com.jayway.jsonpath.spi.mapper.MappingException;
+
 /**
  *
  */
@@ -10,16 +12,23 @@ public interface Predicate {
     public interface PredicateContext {
 
         /**
-         * Returns the current element being evaluated by this predicate
+         * Returns the current item being evaluated by this predicate
+         * @return current document
+         */
+        Object item();
+
+        /**
+         * Returns the current item being evaluated by this predicate. It will be mapped
+         * to the provided class
          * @return current document
          */
-        Object contextDocument();
+        <T> T item(Class<T> clazz) throws MappingException;
 
         /**
          * Returns the root document (the complete JSON)
          * @return root document
          */
-        Object rootDocument();
+        Object root();
 
         /**
          * Configuration to use when evaluating
diff --git a/json-path/src/main/java/com/jayway/jsonpath/internal/JsonReader.java b/json-path/src/main/java/com/jayway/jsonpath/internal/JsonReader.java
index e6562b92..344f0e1a 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/internal/JsonReader.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/internal/JsonReader.java
@@ -114,7 +114,7 @@ public class JsonReader implements ParseContext, ReadContext {
     }
 
     private <T> T convert(Object obj, Class<T> targetType, Configuration configuration){
-        return configuration.conversionProvider().map(obj, targetType, configuration);
+        return configuration.mappingProvider().map(obj, targetType, configuration);
     }
 
 }
diff --git a/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/EvaluationContextImpl.java b/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/EvaluationContextImpl.java
index 6651ae53..1f5a2fae 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/EvaluationContextImpl.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/EvaluationContextImpl.java
@@ -27,7 +27,7 @@ public class EvaluationContextImpl implements EvaluationContext {
 
     public EvaluationContextImpl(Path path, Object rootDocument, Configuration configuration) {
         notNull(path, "path can not be null");
-        notNull(rootDocument, "rootDocument can not be null");
+        notNull(rootDocument, "root can not be null");
         notNull(configuration, "configuration can not be null");
         this.path = path;
         this.rootDocument = rootDocument;
diff --git a/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/PredicateContextImpl.java b/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/PredicateContextImpl.java
index 7c2b9e9a..9f12cca4 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/PredicateContextImpl.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/internal/compiler/PredicateContextImpl.java
@@ -2,6 +2,7 @@ package com.jayway.jsonpath.internal.compiler;
 
 import com.jayway.jsonpath.Configuration;
 import com.jayway.jsonpath.Predicate;
+import com.jayway.jsonpath.spi.mapper.MappingException;
 
 public class PredicateContextImpl implements Predicate.PredicateContext {
     private final Object contextDocument;
@@ -15,12 +16,17 @@ public class PredicateContextImpl implements Predicate.PredicateContext {
     }
 
     @Override
-    public Object contextDocument() {
+    public Object item() {
         return contextDocument;
     }
 
     @Override
-    public Object rootDocument() {
+    public <T> T item(Class<T> clazz) throws MappingException {
+        return  configuration().mappingProvider().map(contextDocument, clazz, configuration);
+    }
+
+    @Override
+    public Object root() {
         return rootDocument;
     }
 
diff --git a/json-path/src/main/java/com/jayway/jsonpath/internal/spi/mapper/DefaultMappingProvider.java b/json-path/src/main/java/com/jayway/jsonpath/internal/spi/mapper/DefaultMappingProvider.java
index a5bd2103..f4fcfe08 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/internal/spi/mapper/DefaultMappingProvider.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/internal/spi/mapper/DefaultMappingProvider.java
@@ -19,10 +19,7 @@ public class DefaultMappingProvider implements MappingProvider {
         addMapper(new DateMapper());
     }
 
-
-
-
-    public void addMapper(Mapper converter) {
+    protected void addMapper(Mapper converter) {
         for (Mapper.ConvertiblePair convertible : converter.getConvertibleTypes()) {
             if(!converters.containsKey(convertible.getTargetType())){
                 converters.put(convertible.getTargetType(), new HashMap<Class<?>, Mapper>());
diff --git a/json-path/src/main/java/com/jayway/jsonpath/spi/mapper/MappingProvider.java b/json-path/src/main/java/com/jayway/jsonpath/spi/mapper/MappingProvider.java
index bcc2cec9..f168dac3 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/spi/mapper/MappingProvider.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/spi/mapper/MappingProvider.java
@@ -2,6 +2,19 @@ package com.jayway.jsonpath.spi.mapper;
 
 import com.jayway.jsonpath.Configuration;
 
+/**
+ * Maps object between different Types
+ */
 public interface MappingProvider {
+
+
+    /**
+     *
+     * @param source object to map
+     * @param targetType the type the source object should be mapped to
+     * @param configuration current configuration
+     * @param <T> the mapped result type
+     * @return return the mapped object
+     */
     <T> T map(Object source, Class<T> targetType, Configuration configuration);
 }
diff --git a/json-path/src/test/java/com/jayway/jsonpath/BaseTest.java b/json-path/src/test/java/com/jayway/jsonpath/BaseTest.java
index be5c680e..06cdfb7e 100644
--- a/json-path/src/test/java/com/jayway/jsonpath/BaseTest.java
+++ b/json-path/src/test/java/com/jayway/jsonpath/BaseTest.java
@@ -1,6 +1,8 @@
 package com.jayway.jsonpath;
 
 import com.jayway.jsonpath.internal.compiler.PredicateContextImpl;
+import com.jayway.jsonpath.internal.spi.json.GsonJsonProvider;
+import com.jayway.jsonpath.internal.spi.mapper.GsonMappingProvider;
 
 public class BaseTest {
     /*
@@ -24,7 +26,11 @@ public class BaseTest {
     }*/
 
 
-
+    public static final Configuration GSON_CONFIGURATION = Configuration
+            .builder()
+            .mappingProvider(new GsonMappingProvider())
+            .jsonProvider(new GsonJsonProvider())
+            .build();
 
     public static final String JSON_DOCUMENT = "{\n" +
             "   \"string-property\" : \"string-value\", \n" +
diff --git a/json-path/src/test/java/com/jayway/jsonpath/FilterTest.java b/json-path/src/test/java/com/jayway/jsonpath/FilterTest.java
index 10452608..0bdc8b39 100644
--- a/json-path/src/test/java/com/jayway/jsonpath/FilterTest.java
+++ b/json-path/src/test/java/com/jayway/jsonpath/FilterTest.java
@@ -374,7 +374,7 @@ public class FilterTest extends BaseTest {
         Predicate p = new Predicate() {
             @Override
             public boolean apply(PredicateContext ctx) {
-                Map<String, Object> t = (Map<String, Object>) ctx.contextDocument();
+                Map<String, Object> t = (Map<String, Object>) ctx.item();
 
                 Object o = t.get("int-key");
 
diff --git a/json-path/src/test/java/com/jayway/jsonpath/JacksonTest.java b/json-path/src/test/java/com/jayway/jsonpath/JacksonTest.java
index 353050da..443ec174 100644
--- a/json-path/src/test/java/com/jayway/jsonpath/JacksonTest.java
+++ b/json-path/src/test/java/com/jayway/jsonpath/JacksonTest.java
@@ -10,7 +10,7 @@ public class JacksonTest {
 
     private static Configuration config = Configuration
             .builder()
-            .conversionProvider(new JacksonMappingProvider())
+            .mappingProvider(new JacksonMappingProvider())
             .jsonProvider(new JacksonJsonProvider())
             .build();
 
diff --git a/json-path/src/test/java/com/jayway/jsonpath/PredicateTest.java b/json-path/src/test/java/com/jayway/jsonpath/PredicateTest.java
new file mode 100644
index 00000000..b4f53cb9
--- /dev/null
+++ b/json-path/src/test/java/com/jayway/jsonpath/PredicateTest.java
@@ -0,0 +1,29 @@
+package com.jayway.jsonpath;
+
+import org.junit.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static com.jayway.jsonpath.JsonPath.using;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class PredicateTest extends BaseTest {
+
+    private static ReadContext reader = using(GSON_CONFIGURATION).parse(JSON_DOCUMENT);
+
+    @Test
+    public void predicates_filters_can_be_applied() {
+
+        Predicate booksWithISBN = new Predicate() {
+            @Override
+            public boolean apply(PredicateContext ctx) {
+                return ctx.item(Map.class).containsKey("isbn");
+            }
+        };
+
+        assertThat(reader.read("$.store.book[?].isbn", List.class, booksWithISBN)).containsOnly("0-395-19395-8", "0-553-21311-3");
+
+
+    }
+}
diff --git a/json-path/src/test/java/com/jayway/jsonpath/old/FilterTest.java b/json-path/src/test/java/com/jayway/jsonpath/old/FilterTest.java
index 60515dc3..3d479e81 100644
--- a/json-path/src/test/java/com/jayway/jsonpath/old/FilterTest.java
+++ b/json-path/src/test/java/com/jayway/jsonpath/old/FilterTest.java
@@ -346,7 +346,7 @@ public class FilterTest extends BaseTest {
         Predicate customFilter = new Predicate () {
             @Override
             public boolean apply(PredicateContext ctx) {
-                if (ctx.configuration().jsonProvider().getMapValue(ctx.contextDocument(), "name").equals("rootGrandChild_A")) {
+                if (ctx.configuration().jsonProvider().getMapValue(ctx.item(), "name").equals("rootGrandChild_A")) {
                     return true;
                 }
                 return false;
@@ -369,7 +369,7 @@ public class FilterTest extends BaseTest {
         Predicate customFilter = new Predicate() {
             @Override
             public boolean apply(PredicateContext ctx) {
-                return 1 == (Integer)ctx.contextDocument();
+                return 1 == (Integer)ctx.item();
             }
         };