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Posted to commits@sling.apache.org by ro...@apache.org on 2017/11/07 09:55:17 UTC

[sling-org-apache-sling-models-impl] 04/16: SLING-3499 - adding support for custom annotation per injector (thanks Konrad Windszus for the patch!)

This is an automated email from the ASF dual-hosted git repository.

rombert pushed a commit to annotated tag org.apache.sling.models.impl-1.0.6
in repository https://gitbox.apache.org/repos/asf/sling-org-apache-sling-models-impl.git

commit 189f1d3262130da997743732e1b84b1e89cd63e3
Author: Justin Edelson <ju...@apache.org>
AuthorDate: Wed Jun 4 19:38:55 2014 +0000

    SLING-3499 - adding support for custom annotation per injector (thanks Konrad Windszus for the patch!)
    
    git-svn-id: https://svn.apache.org/repos/asf/sling/trunk/bundles/extensions/models/impl@1600469 13f79535-47bb-0310-9956-ffa450edef68
---
 pom.xml                                            |   2 +-
 .../sling/models/impl/ModelAdapterFactory.java     | 424 +++++++++++----------
 .../models/impl/injectors/BindingsInjector.java    |  43 ++-
 .../impl/injectors/ChildResourceInjector.java      |  60 ++-
 .../models/impl/injectors/OSGiServiceInjector.java |  64 +++-
 .../impl/injectors/RequestAttributeInjector.java   |  48 ++-
 .../models/impl/injectors/ValueMapInjector.java    |  62 ++-
 .../sling/models/impl/CustomInjectorTest.java      |  90 +++++
 .../impl/InjectorSpecificAnnotationTest.java       | 180 +++++++++
 .../sling/models/impl/MultipleInjectorTest.java    |   1 +
 .../sling/models/impl/PostConstructTest.java       |   2 +-
 .../models/impl/injector/CustomAnnotation.java     |  32 ++
 .../impl/injector/CustomAnnotationInjector.java    |  66 ++++
 .../models/impl/injector/SimpleInjector.java}      |  21 +-
 .../classes/InjectorSpecificAnnotationModel.java   |  82 ++++
 15 files changed, 941 insertions(+), 236 deletions(-)

diff --git a/pom.xml b/pom.xml
index 2197578..dd759b7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -63,7 +63,7 @@
         <dependency>
             <groupId>org.apache.sling</groupId>
             <artifactId>org.apache.sling.models.api</artifactId>
-            <version>1.0.0</version>
+            <version>1.0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
diff --git a/src/main/java/org/apache/sling/models/impl/ModelAdapterFactory.java b/src/main/java/org/apache/sling/models/impl/ModelAdapterFactory.java
index 21ddc76..483215a 100644
--- a/src/main/java/org/apache/sling/models/impl/ModelAdapterFactory.java
+++ b/src/main/java/org/apache/sling/models/impl/ModelAdapterFactory.java
@@ -34,7 +34,6 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Hashtable;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -65,6 +64,9 @@ import org.apache.sling.models.annotations.Via;
 import org.apache.sling.models.spi.DisposalCallback;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotation;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.Constants;
 import org.osgi.framework.ServiceRegistration;
@@ -177,8 +179,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         if (type.isInterface()) {
             InvocationHandler handler = createInvocationHandler(adaptable, type);
             if (handler != null) {
-                return (AdapterType) Proxy.newProxyInstance(type.getClassLoader(), new Class<?>[] { type },
-                        handler);
+                return (AdapterType) Proxy.newProxyInstance(type.getClassLoader(), new Class<?>[] { type }, handler);
             } else {
                 return null;
             }
@@ -196,12 +197,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         Set<Field> result = new HashSet<Field>();
         while (type != null) {
             Field[] fields = type.getDeclaredFields();
-            for (Field field : fields) {
-                Inject injection = field.getAnnotation(Inject.class);
-                if (injection != null) {
-                    result.add(field);
-                }
-            }
+            addAnnotated(fields, result);
             type = type.getSuperclass();
         }
         return result;
@@ -211,76 +207,124 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         Set<Method> result = new HashSet<Method>();
         while (type != null) {
             Method[] methods = type.getDeclaredMethods();
-            for (Method method : methods) {
-                Inject injection = method.getAnnotation(Inject.class);
-                if (injection != null) {
-                    result.add(method);
-                }
-            }
+            addAnnotated(methods, result);
             type = type.getSuperclass();
         }
         return result;
     }
 
-    private InvocationHandler createInvocationHandler(final Object adaptable, final Class<?> type) {
-        Set<Method> injectableMethods = collectInjectableMethods(type);
-        Map<Method, Object> methods = new HashMap<Method, Object>();
-        MapBackedInvocationHandler handler = new MapBackedInvocationHandler(methods);
+    private <T extends AnnotatedElement> void addAnnotated(T[] elements, Set<T> set) {
+        for (T element : elements) {
+            Inject injection = getAnnotation(element, Inject.class);
+            if (injection != null) {
+                set.add(element);
+            } else {
+                InjectAnnotation modelInject = getAnnotation(element, InjectAnnotation.class);
+                if (modelInject != null) {
+                    set.add(element);
+                }
+            }
+        }
+    }
 
-        DisposalCallbackRegistryImpl registry = createAndRegisterCallbackRegistry(handler);
+    private static interface InjectCallback {
+        /**
+         * Is called each time when the given value should be injected into the given element
+         * @param element
+         * @param value
+         * @return true if injection was successful otherwise false
+         */
+        public boolean inject(AnnotatedElement element, Object value);
+    }
+
+    private static class SetFieldCallback implements InjectCallback {
+
+        private final Object object;
+
+        private SetFieldCallback(Object object) {
+            this.object = object;
+        }
+
+        @Override
+        public boolean inject(AnnotatedElement element, Object value) {
+            return setField((Field) element, object, value);
+        }
+    }
+
+    private static class SetMethodsCallback implements InjectCallback {
+
+        private final Map<Method, Object> methods;
+
+        private SetMethodsCallback( Map<Method, Object> methods) {
+            this.methods = methods;
+        }
+
+        @Override
+        public boolean inject(AnnotatedElement element, Object value) {
+            return setMethod((Method) element, methods, value);
+        }
+    }
+
+    private boolean injectFieldOrMethod(final AnnotatedElement element, final Object adaptable, final Type type,
+            final DisposalCallbackRegistry registry, InjectCallback callback) {
+
+        InjectAnnotationProcessor annotationProcessor = null;
+        String source = getSource(element);
+        boolean wasInjectionSuccessful = false;
 
+        // find the right injector
         for (Injector injector : sortedInjectors) {
-            Iterator<Method> it = injectableMethods.iterator();
-            while (it.hasNext()) {
-                Method method = it.next();
-                String source = getSource(method);
-                if (source == null || source.equals(injector.getName())) {
-                    String name = getName(method);
-                    Type returnType = mapPrimitiveClasses(method.getGenericReturnType());
-                    Object injectionAdaptable = getAdaptable(adaptable, method);
-                    if (injectionAdaptable != null) {
-                        Object value = injector.getValue(injectionAdaptable, name, returnType, method, registry);
-                        if (setMethod(method, methods, value)) {
-                            it.remove();
-                        }
+            if (source == null || source.equals(injector.getName())) {
+                // get annotation processor
+                if (injector instanceof InjectAnnotationProcessorFactory) {
+                    annotationProcessor = ((InjectAnnotationProcessorFactory) injector).createAnnotationProcessor(adaptable,
+                            element);
+                }
+
+                String name = getName(element, annotationProcessor);
+                Object injectionAdaptable = getAdaptable(adaptable, element, annotationProcessor);
+                if (injectionAdaptable != null) {
+                    Object value = injector.getValue(injectionAdaptable, name, type, element, registry);
+                    if (callback.inject(element, value)) {
+                        wasInjectionSuccessful = true;
+                        break;
                     }
                 }
             }
         }
+        // if injection failed, use default
+        if (!wasInjectionSuccessful) {
+            wasInjectionSuccessful = injectDefaultValue(element, type, annotationProcessor, callback);
+        }
 
-        registry.seal();
-
-        Iterator<Method> it = injectableMethods.iterator();
-        while (it.hasNext()) {
-            Method method = it.next();
-            Default defaultAnnotation = method.getAnnotation(Default.class);
-            if (defaultAnnotation != null) {
-                Type returnType = mapPrimitiveClasses(method.getGenericReturnType());
-                Object value = getDefaultValue(defaultAnnotation, returnType);
-                if (setMethod(method, methods, value)) {
-                    it.remove();
-                }
-            }
+        // if default is not set, check if mandatory
+        if (!wasInjectionSuccessful && !isOptional(element, annotationProcessor)) {
+            return false;
         }
+        return true;
+    }
 
-        if (injectableMethods.isEmpty()) {
-            return handler;
-        } else {
-            Set<Method> requiredMethods = new HashSet<Method>();
-            for (Method method : injectableMethods) {
-                if (method.getAnnotation(Optional.class) == null) {
-                    requiredMethods.add(method);
-                }
-            }
+    private InvocationHandler createInvocationHandler(final Object adaptable, final Class<?> type) {
+        Set<Method> injectableMethods = collectInjectableMethods(type);
+        final Map<Method, Object> methods = new HashMap<Method, Object>();
+        SetMethodsCallback callback = new SetMethodsCallback(methods);
+        MapBackedInvocationHandler handler = new MapBackedInvocationHandler(methods);
 
-            if (!requiredMethods.isEmpty()) {
-                log.warn("Required methods {} on model class {} were not able to be injected.", requiredMethods,
-                        type);
-                return null;
-            } else {
-                return handler;
+        DisposalCallbackRegistryImpl registry = createAndRegisterCallbackRegistry(handler);
+        Set<Method> requiredMethods = new HashSet<Method>();
+
+        for (Method method : injectableMethods) {
+            Type returnType = mapPrimitiveClasses(method.getGenericReturnType());
+            if (!injectFieldOrMethod(method, adaptable, returnType, registry, callback)) {
+                requiredMethods.add(method);
             }
         }
+        registry.seal();
+        if (!requiredMethods.isEmpty()) {
+            log.warn("Required methods {} on model interface {} were not able to be injected.", requiredMethods, type);
+            return null;
+        }
+        return handler;
     }
 
     private DisposalCallbackRegistryImpl createAndRegisterCallbackRegistry(Object object) {
@@ -367,160 +411,133 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         } else {
             object = constructorToUse.newInstance();
         }
+        InjectCallback callback = new SetFieldCallback(object);
 
         DisposalCallbackRegistryImpl registry = createAndRegisterCallbackRegistry(object);
 
-        for (Injector injector : sortedInjectors) {
-            Iterator<Field> it = injectableFields.iterator();
-            while (it.hasNext()) {
-                Field field = it.next();
-                String source = getSource(field);
-                if (source == null || source.equals(injector.getName())) {
-                    String name = getName(field);
-                    Type fieldType = mapPrimitiveClasses(field.getGenericType());
-                    Object injectionAdaptable = getAdaptable(adaptable, field);
-                    if (injectionAdaptable != null) {
-                        Object value = injector.getValue(injectionAdaptable, name, fieldType, field, registry);
-                        if (setField(field, object, value)) {
-                            it.remove();
-                        }
-                    }
-                }
+        Set<Field> requiredFields = new HashSet<Field>();
+
+        for (Field field : injectableFields) {
+            Type fieldType = mapPrimitiveClasses(field.getGenericType());
+            if (!injectFieldOrMethod(field, adaptable, fieldType, registry, callback)) {
+                requiredFields.add(field);
             }
         }
 
         registry.seal();
+        if (!requiredFields.isEmpty()) {
+            log.warn("Required properties {} on model class {} were not able to be injected.", requiredFields, type);
+            return null;
+        }
+        try {
+            invokePostConstruct(object);
+            return object;
+        } catch (Exception e) {
+            log.error("Unable to invoke post construct method.", e);
+            return null;
+        }
 
-        Iterator<Field> it = injectableFields.iterator();
-        while (it.hasNext()) {
-            Field field = it.next();
-            Default defaultAnnotation = field.getAnnotation(Default.class);
-            if (defaultAnnotation != null) {
-                Type fieldType = mapPrimitiveClasses(field.getGenericType());
-                Object value = getDefaultValue(defaultAnnotation, fieldType);
-                if (setField(field, object, value)) {
-                    it.remove();
-                }
+    }
+
+    private boolean isOptional(AnnotatedElement point, InjectAnnotationProcessor annotationProcessor) {
+        if (annotationProcessor != null) {
+            Boolean isOptional = annotationProcessor.isOptional();
+            if (isOptional != null) {
+                return isOptional.booleanValue();
             }
         }
+        return (point.getAnnotation(Optional.class) != null);
+    }
 
-        if (injectableFields.isEmpty()) {
-            try {
-                invokePostConstruct(object);
-                return object;
-            } catch (Exception e) {
-                log.error("Unable to invoke post construct method.", e);
-                return null;
-            }
-        } else {
-            Set<Field> requiredFields = new HashSet<Field>();
-            for (Field field : injectableFields) {
-                if (field.getAnnotation(Optional.class) == null) {
-                    requiredFields.add(field);
-                }
-            }
+    private boolean injectDefaultValue(AnnotatedElement point, Type type, InjectAnnotationProcessor processor,
+            InjectCallback callback) {
 
-            if (!requiredFields.isEmpty()) {
-                log.warn("Required properties {} on model class {} were not able to be injected.", requiredFields,
-                        type);
-                return null;
-            } else {
-                try {
-                    invokePostConstruct(object);
-                    return object;
-                } catch (Exception e) {
-                    log.error("Unable to invoke post construct method.", e);
-                    return null;
-                }
+        if (processor != null) {
+            if (processor.hasDefault()) {
+                return callback.inject(point, processor.getDefault());
             }
         }
-    }
+        Default defaultAnnotation = point.getAnnotation(Default.class);
+        if (defaultAnnotation == null) {
+            return false;
+        }
+
+        type = mapPrimitiveClasses(type);
+        Object value = null;
 
-    private Object getDefaultValue(Default defaultAnnotation, Type type) {
         if (type instanceof Class) {
             Class<?> injectedClass = (Class<?>) type;
             if (injectedClass.isArray()) {
                 Class<?> componentType = injectedClass.getComponentType();
                 if (componentType == String.class) {
-                    return defaultAnnotation.values();
-                }
-                if (componentType == Integer.TYPE) {
-                    return defaultAnnotation.intValues();
-                }
-                if (componentType == Integer.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.intValues());
-                }
-                if (componentType == Long.TYPE) {
-                    return defaultAnnotation.longValues();
-                }
-                if (componentType == Long.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.longValues());
-                }
-                if (componentType == Boolean.TYPE) {
-                    return defaultAnnotation.booleanValues();
-                }
-                if (componentType == Boolean.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.booleanValues());
-                }
-                if (componentType == Short.TYPE) {
-                    return defaultAnnotation.shortValues();
-                }
-                if (componentType == Short.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.shortValues());
-                }
-                if (componentType == Float.TYPE) {
-                    return defaultAnnotation.floatValues();
-                }
-                if (componentType == Float.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.floatValues());
-                }
-                if (componentType == Double.TYPE) {
-                    return defaultAnnotation.doubleValues();
-                }
-                if (componentType == Double.class) {
-                    return ArrayUtils.toObject(defaultAnnotation.doubleValues());
+                    value = defaultAnnotation.values();
+                } else if (componentType == Integer.TYPE) {
+                    value = defaultAnnotation.intValues();
+                } else if (componentType == Integer.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.intValues());
+                } else if (componentType == Long.TYPE) {
+                    value = defaultAnnotation.longValues();
+                } else if (componentType == Long.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.longValues());
+                } else if (componentType == Boolean.TYPE) {
+                    value = defaultAnnotation.booleanValues();
+                } else if (componentType == Boolean.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.booleanValues());
+                } else if (componentType == Short.TYPE) {
+                    value = defaultAnnotation.shortValues();
+                } else if (componentType == Short.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.shortValues());
+                } else if (componentType == Float.TYPE) {
+                    value = defaultAnnotation.floatValues();
+                } else if (componentType == Float.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.floatValues());
+                } else if (componentType == Double.TYPE) {
+                    value = defaultAnnotation.doubleValues();
+                } else if (componentType == Double.class) {
+                    value = ArrayUtils.toObject(defaultAnnotation.doubleValues());
+                } else {
+                    log.warn("Default values for {} are not supported", componentType);
+                    return false;
                 }
-
-                log.warn("Default values for {} are not supported", componentType);
-                return null;
             } else {
                 if (injectedClass == String.class) {
-                    return defaultAnnotation.values()[0];
-                }
-                if (injectedClass == Integer.class) {
-                    return defaultAnnotation.intValues()[0];
-                }
-                if (injectedClass == Long.class) {
-                    return defaultAnnotation.longValues()[0];
-                }
-                if (injectedClass == Boolean.class) {
-                    return defaultAnnotation.booleanValues()[0];
-                }
-                if (injectedClass == Short.class) {
-                    return defaultAnnotation.shortValues()[0];
-                }
-                if (injectedClass == Float.class) {
-                    return defaultAnnotation.floatValues()[0];
-                }
-                if (injectedClass == Double.class) {
-                    return defaultAnnotation.doubleValues()[0];
+                    value = defaultAnnotation.values()[0];
+                } else if (injectedClass == Integer.class) {
+                    value = defaultAnnotation.intValues()[0];
+                } else if (injectedClass == Long.class) {
+                    value = defaultAnnotation.longValues()[0];
+                } else if (injectedClass == Boolean.class) {
+                    value = defaultAnnotation.booleanValues()[0];
+                } else if (injectedClass == Short.class) {
+                    value = defaultAnnotation.shortValues()[0];
+                } else if (injectedClass == Float.class) {
+                    value = defaultAnnotation.floatValues()[0];
+                } else if (injectedClass == Double.class) {
+                    value = defaultAnnotation.doubleValues()[0];
+                } else {
+                    log.warn("Default values for {} are not supported", injectedClass);
+                    return false;
                 }
-
-                log.warn("Default values for {} are not supported", injectedClass);
-                return null;
             }
         } else {
             log.warn("Cannot provide default for {}", type);
-            return null;
+            return false;
         }
+        return callback.inject(point, value);
     }
 
-    private Object getAdaptable(Object adaptable, AnnotatedElement point) {
-        Via viaAnnotation = point.getAnnotation(Via.class);
-        if (viaAnnotation == null) {
-            return adaptable;
+    private Object getAdaptable(Object adaptable, AnnotatedElement point, InjectAnnotationProcessor processor) {
+        String viaPropertyName = null;
+        if (processor != null) {
+            viaPropertyName = processor.getVia();
+        }
+        if (viaPropertyName == null) {
+            Via viaAnnotation = point.getAnnotation(Via.class);
+            if (viaAnnotation == null) {
+                return adaptable;
+            }
+            viaPropertyName = viaAnnotation.value();
         }
-        String viaPropertyName = viaAnnotation.value();
         try {
             return PropertyUtils.getProperty(adaptable, viaPropertyName);
         } catch (Exception e) {
@@ -529,19 +546,33 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         }
     }
 
-    private String getName(Field field) {
-        Named named = field.getAnnotation(Named.class);
+    private String getName(AnnotatedElement element, InjectAnnotationProcessor processor) {
+        // try to get the name from injector-specific annotation
+        if (processor != null) {
+            String name = processor.getName();
+            if (name != null) {
+                return name;
+            }
+        }
+        // alternative for name attribute
+        Named named = element.getAnnotation(Named.class);
         if (named != null) {
             return named.value();
         }
+        if (element instanceof Method) {
+            return getNameFromMethod((Method) element);
+        } else if (element instanceof Field) {
+            return getNameFromField((Field) element);
+        } else {
+            throw new IllegalArgumentException("The given element must be either method or field but is " + element);
+        }
+    }
+
+    private String getNameFromField(Field field) {
         return field.getName();
     }
 
-    private String getName(Method method) {
-        Named named = method.getAnnotation(Named.class);
-        if (named != null) {
-            return named.value();
-        }
+    private String getNameFromMethod(Method method) {
         String methodName = method.getName();
         if (methodName.startsWith("get")) {
             return methodName.substring(3, 4).toLowerCase() + methodName.substring(4);
@@ -606,7 +637,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         return type;
     }
 
-    private boolean setField(Field field, Object createdObject, Object value) {
+    private static boolean setField(Field field, Object createdObject, Object value) {
         if (value != null) {
             if (!isAcceptableType(field.getType(), value) && value instanceof Adaptable) {
                 value = ((Adaptable) value).adaptTo(field.getType());
@@ -634,7 +665,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         }
     }
 
-    private boolean setMethod(Method method, Map<Method, Object> methods, Object value) {
+    private static boolean setMethod(Method method, Map<Method, Object> methods, Object value) {
         if (value != null) {
             if (!isAcceptableType(method.getReturnType(), value) && value instanceof Adaptable) {
                 value = ((Adaptable) value).adaptTo(method.getReturnType());
@@ -649,7 +680,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         }
     }
 
-    private boolean isAcceptableType(Class<?> type, Object value) {
+    private static boolean isAcceptableType(Class<?> type, Object value) {
         if (type.isInstance(value)) {
             return true;
         }
@@ -690,8 +721,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         properties.put("scheduler.concurrent", false);
         properties.put("scheduler.period", Long.valueOf(30));
 
-        this.jobRegistration = bundleContext.registerService(Runnable.class.getName(), this,
-                properties);
+        this.jobRegistration = bundleContext.registerService(Runnable.class.getName(), this, properties);
 
         this.listener = new ModelPackageBundleListener(ctx.getBundleContext(), this);
 
@@ -703,7 +733,7 @@ public class ModelAdapterFactory implements AdapterFactory, Runnable {
         printerProps.put("felix.webconsole.configprinter.modes", "always");
 
         this.configPrinterRegistration = bundleContext.registerService(Object.class.getName(),
-            new ModelConfigurationPrinter(this), printerProps);
+                new ModelConfigurationPrinter(this), printerProps);
     }
 
     @Deactivate
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/BindingsInjector.java b/src/main/java/org/apache/sling/models/impl/injectors/BindingsInjector.java
index aa5ed5c..e2140e2 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/BindingsInjector.java
+++ b/src/main/java/org/apache/sling/models/impl/injectors/BindingsInjector.java
@@ -25,8 +25,12 @@ import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Property;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.sling.api.scripting.SlingBindings;
+import org.apache.sling.models.annotations.injectorspecific.ScriptVariable;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.Constants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -34,7 +38,7 @@ import org.slf4j.LoggerFactory;
 @Component
 @Service
 @Property(name = Constants.SERVICE_RANKING, intValue = 1000)
-public class BindingsInjector implements Injector {
+public class BindingsInjector implements Injector, InjectAnnotationProcessorFactory {
 
     private static final Logger log = LoggerFactory.getLogger(BindingsInjector.class);
 
@@ -52,7 +56,8 @@ public class BindingsInjector implements Injector {
         }
     }
 
-    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
+    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
         SlingBindings bindings = getBindings(adaptable);
         if (bindings == null) {
             return null;
@@ -75,4 +80,38 @@ public class BindingsInjector implements Injector {
         }
     }
 
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        // check if the element has the expected annotation
+        ScriptVariable annotation = element.getAnnotation(ScriptVariable.class);
+        if (annotation != null) {
+            return new ScriptVariableAnnotationProcessor(annotation);
+        }
+        return null;
+    }
+
+    private static class ScriptVariableAnnotationProcessor extends AbstractInjectAnnotationProcessor {
+
+        private final ScriptVariable annotation;
+
+        public ScriptVariableAnnotationProcessor(ScriptVariable annotation) {
+            this.annotation = annotation;
+        }
+
+        @Override
+        public Boolean isOptional() {
+            return annotation.optional();
+        }
+
+        @Override
+        public String getName() {
+            // since null is not allowed as default value in annotations, the empty string means, the default should be
+            // used!
+            if (annotation.name().isEmpty()) {
+                return null;
+            }
+            return annotation.name();
+        }
+    }
+
 }
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java b/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java
index 194db83..500473b 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java
+++ b/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java
@@ -19,18 +19,24 @@ package org.apache.sling.models.impl.injectors;
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Type;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Property;
 import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.api.SlingHttpServletRequest;
 import org.apache.sling.api.resource.Resource;
+import org.apache.sling.models.annotations.injectorspecific.ChildResource;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.Constants;
 
 @Component
 @Service
 @Property(name = Constants.SERVICE_RANKING, intValue = 3000)
-public class ChildResourceInjector implements Injector {
+public class ChildResourceInjector implements Injector, InjectAnnotationProcessorFactory {
 
     @Override
     public String getName() {
@@ -38,7 +44,8 @@ public class ChildResourceInjector implements Injector {
     }
 
     @Override
-    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
+    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
         if (adaptable instanceof Resource) {
             return ((Resource) adaptable).getChild(name);
         } else {
@@ -46,4 +53,53 @@ public class ChildResourceInjector implements Injector {
         }
     }
 
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        // check if the element has the expected annotation
+        ChildResource annotation = element.getAnnotation(ChildResource.class);
+        if (annotation != null) {
+            return new ChildResourceAnnotationProcessor(annotation, adaptable);
+        }
+        return null;
+    }
+
+    private static class ChildResourceAnnotationProcessor extends AbstractInjectAnnotationProcessor {
+
+        private final ChildResource annotation;
+        private final Object adaptable;
+
+        public ChildResourceAnnotationProcessor(ChildResource annotation, Object adaptable) {
+            this.annotation = annotation;
+            this.adaptable = adaptable;
+        }
+
+        @Override
+        public String getName() {
+            // since null is not allowed as default value in annotations, the empty string means, the default should be
+            // used!
+            if (annotation.name().isEmpty()) {
+                return null;
+            }
+            return annotation.name();
+        }
+
+        @Override
+        public Boolean isOptional() {
+            return annotation.optional();
+        }
+
+        @Override
+        public String getVia() {
+            if (StringUtils.isNotBlank(annotation.via())) {
+                return annotation.via();
+            }
+            // automatically go via resource, if this is the httprequest
+            if (adaptable instanceof SlingHttpServletRequest) {
+                return "resource";
+            } else {
+                return null;
+            }
+        }
+    }
+
 }
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/OSGiServiceInjector.java b/src/main/java/org/apache/sling/models/impl/injectors/OSGiServiceInjector.java
index 59a9636..fb85dc0 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/OSGiServiceInjector.java
+++ b/src/main/java/org/apache/sling/models/impl/injectors/OSGiServiceInjector.java
@@ -27,6 +27,7 @@ import java.util.List;
 
 import javax.servlet.ServletRequest;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Property;
@@ -34,9 +35,13 @@ import org.apache.felix.scr.annotations.Service;
 import org.apache.sling.api.scripting.SlingBindings;
 import org.apache.sling.api.scripting.SlingScriptHelper;
 import org.apache.sling.models.annotations.Filter;
+import org.apache.sling.models.annotations.injectorspecific.OSGiService;
 import org.apache.sling.models.spi.DisposalCallback;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.Constants;
 import org.osgi.framework.InvalidSyntaxException;
@@ -48,7 +53,7 @@ import org.slf4j.LoggerFactory;
 @Component
 @Service
 @Property(name = Constants.SERVICE_RANKING, intValue = 5000)
-public class OSGiServiceInjector implements Injector {
+public class OSGiServiceInjector implements Injector, InjectAnnotationProcessorFactory {
 
     private static final Logger log = LoggerFactory.getLogger(OSGiServiceInjector.class);
 
@@ -64,17 +69,25 @@ public class OSGiServiceInjector implements Injector {
         this.bundleContext = ctx.getBundleContext();
     }
 
-    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
-        Filter filter = element.getAnnotation(Filter.class);
+    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
+        OSGiService annotation = element.getAnnotation(OSGiService.class);
         String filterString = null;
-        if (filter != null) {
-            filterString = filter.value();
+        if (annotation != null) {
+            if (StringUtils.isNotBlank(annotation.filter())) {
+                filterString = annotation.filter();
+            }
+        } else {
+            Filter filter = element.getAnnotation(Filter.class);
+            if (filter != null) {
+                filterString = filter.value();
+            }
         }
-
         return getValue(adaptable, type, filterString, callbackRegistry);
     }
 
-    private <T> Object getService(Object adaptable, Class<T> type, String filter, DisposalCallbackRegistry callbackRegistry) {
+    private <T> Object getService(Object adaptable, Class<T> type, String filter,
+            DisposalCallbackRegistry callbackRegistry) {
         SlingScriptHelper helper = getScriptHelper(adaptable);
 
         if (helper != null) {
@@ -100,7 +113,8 @@ public class OSGiServiceInjector implements Injector {
         }
     }
 
-    private <T> Object[] getServices(Object adaptable, Class<T> type, String filter, DisposalCallbackRegistry callbackRegistry) {
+    private <T> Object[] getServices(Object adaptable, Class<T> type, String filter,
+            DisposalCallbackRegistry callbackRegistry) {
         SlingScriptHelper helper = getScriptHelper(adaptable);
 
         if (helper != null) {
@@ -147,7 +161,8 @@ public class OSGiServiceInjector implements Injector {
         if (type instanceof Class) {
             Class<?> injectedClass = (Class<?>) type;
             if (injectedClass.isArray()) {
-                Object[] services = getServices(adaptable, injectedClass.getComponentType(), filterString, callbackRegistry);
+                Object[] services = getServices(adaptable, injectedClass.getComponentType(), filterString,
+                        callbackRegistry);
                 if (services == null) {
                     return null;
                 }
@@ -180,16 +195,16 @@ public class OSGiServiceInjector implements Injector {
             return null;
         }
     }
-    
+
     private static class Callback implements DisposalCallback {
         private final ServiceReference[] refs;
         private final BundleContext context;
-        
+
         public Callback(ServiceReference[] refs, BundleContext context) {
             this.refs = refs;
             this.context = context;
         }
-        
+
         @Override
         public void onDisposed() {
             if (refs != null) {
@@ -200,4 +215,29 @@ public class OSGiServiceInjector implements Injector {
         }
     }
 
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        // check if the element has the expected annotation
+        OSGiService annotation = element.getAnnotation(OSGiService.class);
+        if (annotation != null) {
+            return new OSGiServiceAnnotationProcessor(annotation);
+        }
+        return null;
+    }
+
+    private static class OSGiServiceAnnotationProcessor extends AbstractInjectAnnotationProcessor {
+
+        private final OSGiService annotation;
+
+        public OSGiServiceAnnotationProcessor(OSGiService annotation) {
+            this.annotation = annotation;
+        }
+
+        @Override
+        public Boolean isOptional() {
+            return annotation.optional();
+        }
+    }
+
+
 }
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/RequestAttributeInjector.java b/src/main/java/org/apache/sling/models/impl/injectors/RequestAttributeInjector.java
index fb73063..23c3907 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/RequestAttributeInjector.java
+++ b/src/main/java/org/apache/sling/models/impl/injectors/RequestAttributeInjector.java
@@ -24,8 +24,12 @@ import javax.servlet.ServletRequest;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Property;
 import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.models.annotations.injectorspecific.RequestAttribute;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.Constants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -33,22 +37,23 @@ import org.slf4j.LoggerFactory;
 @Component
 @Service
 @Property(name = Constants.SERVICE_RANKING, intValue = 4000)
-public class RequestAttributeInjector implements Injector {
+public class RequestAttributeInjector implements Injector, InjectAnnotationProcessorFactory {
 
     private static final Logger log = LoggerFactory.getLogger(RequestAttributeInjector.class);
-    
+
     @Override
     public String getName() {
         return "request-attributes";
     }
 
     @Override
-    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
+    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
         if (!(adaptable instanceof ServletRequest)) {
             return null;
         } else if (declaredType instanceof Class<?>) {
             Class<?> clazz = (Class<?>) declaredType;
-            Object attribute = ((ServletRequest)adaptable).getAttribute(name);
+            Object attribute = ((ServletRequest) adaptable).getAttribute(name);
             if (clazz.isInstance(attribute)) {
                 return attribute;
             } else {
@@ -60,4 +65,39 @@ public class RequestAttributeInjector implements Injector {
         }
     }
 
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        // check if the element has the expected annotation
+        RequestAttribute annotation = element.getAnnotation(RequestAttribute.class);
+        if (annotation != null) {
+            return new RequestAttributeAnnotationProcessor(annotation);
+        }
+        return null;
+    }
+
+    private static class RequestAttributeAnnotationProcessor extends AbstractInjectAnnotationProcessor {
+
+        private final RequestAttribute annotation;
+
+        public RequestAttributeAnnotationProcessor(RequestAttribute annotation) {
+            this.annotation = annotation;
+        }
+
+        @Override
+        public Boolean isOptional() {
+            return annotation.optional();
+        }
+
+        @Override
+        public String getName() {
+            // since null is not allowed as default value in annotations, the empty string means, the default should be
+            // used!
+            if (annotation.name().isEmpty()) {
+                return null;
+            }
+            return annotation.name();
+        }
+    }
+
+    
 }
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/ValueMapInjector.java b/src/main/java/org/apache/sling/models/impl/injectors/ValueMapInjector.java
index f6bea43..b5a6a2d 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/ValueMapInjector.java
+++ b/src/main/java/org/apache/sling/models/impl/injectors/ValueMapInjector.java
@@ -19,13 +19,19 @@ package org.apache.sling.models.impl.injectors;
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Type;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Property;
 import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.api.SlingHttpServletRequest;
 import org.apache.sling.api.adapter.Adaptable;
 import org.apache.sling.api.resource.ValueMap;
+import org.apache.sling.models.annotations.injectorspecific.ValueMapValue;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
 import org.osgi.framework.Constants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -33,16 +39,17 @@ import org.slf4j.LoggerFactory;
 @Component
 @Service
 @Property(name = Constants.SERVICE_RANKING, intValue = 2000)
-public class ValueMapInjector implements Injector {
+public class ValueMapInjector implements InjectAnnotationProcessorFactory, Injector {
 
     private static final Logger log = LoggerFactory.getLogger(ValueMapInjector.class);
-    
+
     @Override
     public String getName() {
         return "valuemap";
     }
 
-    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
+    public Object getValue(Object adaptable, String name, Type type, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
         ValueMap map = getMap(adaptable);
         if (map == null) {
             return null;
@@ -65,4 +72,53 @@ public class ValueMapInjector implements Injector {
         }
     }
 
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        // check if the element has the expected annotation
+        ValueMapValue annotation = element.getAnnotation(ValueMapValue.class);
+        if (annotation != null) {
+            return new ValueAnnotationProcessor(annotation, adaptable);
+        }
+        return null;
+    }
+
+    private static class ValueAnnotationProcessor extends AbstractInjectAnnotationProcessor {
+
+        private final ValueMapValue annotation;
+
+        private final Object adaptable;
+
+        public ValueAnnotationProcessor(ValueMapValue annotation, Object adaptable) {
+            this.annotation = annotation;
+            this.adaptable = adaptable;
+        }
+
+        @Override
+        public String getName() {
+            // since null is not allowed as default value in annotations, the empty string means, the default should be
+            // used!
+            if (annotation.name().isEmpty()) {
+                return null;
+            }
+            return annotation.name();
+        }
+
+        @Override
+        public String getVia() {
+            if (StringUtils.isNotBlank(annotation.via())) {
+                return annotation.via();
+            }
+            // automatically go via resource, if this is the httprequest
+            if (adaptable instanceof SlingHttpServletRequest) {
+                return "resource";
+            } else {
+                return null;
+            }
+        }
+
+        @Override
+        public Boolean isOptional() {
+            return annotation.optional();
+        }
+    }
 }
diff --git a/src/test/java/org/apache/sling/models/impl/CustomInjectorTest.java b/src/test/java/org/apache/sling/models/impl/CustomInjectorTest.java
new file mode 100644
index 0000000..2db9d7d
--- /dev/null
+++ b/src/test/java/org/apache/sling/models/impl/CustomInjectorTest.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.sling.models.impl;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import javax.inject.Inject;
+
+import org.apache.sling.models.annotations.Model;
+import org.apache.sling.models.impl.injector.CustomAnnotation;
+import org.apache.sling.models.impl.injector.CustomAnnotationInjector;
+import org.apache.sling.models.impl.injector.SimpleInjector;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.osgi.framework.BundleContext;
+import org.osgi.service.component.ComponentContext;
+
+@RunWith(MockitoJUnitRunner.class)
+public class CustomInjectorTest {
+
+    @Mock
+    private ComponentContext componentCtx;
+
+    @Mock
+    private BundleContext bundleContext;
+
+    private ModelAdapterFactory factory;
+
+    @Before
+    public void setup() {
+        when(componentCtx.getBundleContext()).thenReturn(bundleContext);
+
+        factory = new ModelAdapterFactory();
+        factory.activate(componentCtx);
+    }
+
+    @Test
+    public void testInjectorWhichDoesNotImplementAnnotationProcessor() {
+        factory.bindInjector(new SimpleInjector(), new ServicePropertiesMap(1, 1));
+
+        TestModel model = factory.getAdapter(new Object(), TestModel.class);
+        assertNotNull(model);
+        assertEquals("test string", model.getTestString());
+    }
+
+    @Test
+    public void testInjectorWithCustomAnnotation() {
+        factory.bindInjector(new SimpleInjector(), new ServicePropertiesMap(1, 1));
+        factory.bindInjector(new CustomAnnotationInjector(), new ServicePropertiesMap(1, 1));
+
+        CustomAnnotationModel model = factory.getAdapter(new Object(), CustomAnnotationModel.class);
+        assertNotNull(model);
+        assertEquals("default value", model.getDefaultString());
+        assertEquals("custom value", model.getCustomString());
+    }
+
+    @Model(adaptables = Object.class)
+    public interface TestModel {
+        @Inject
+        String getTestString();
+    }
+
+    @Model(adaptables = Object.class)
+    public interface CustomAnnotationModel {
+        @CustomAnnotation
+        String getDefaultString();
+
+        @Inject
+        String getCustomString();
+    }
+
+}
diff --git a/src/test/java/org/apache/sling/models/impl/InjectorSpecificAnnotationTest.java b/src/test/java/org/apache/sling/models/impl/InjectorSpecificAnnotationTest.java
new file mode 100644
index 0000000..6fe6a2b
--- /dev/null
+++ b/src/test/java/org/apache/sling/models/impl/InjectorSpecificAnnotationTest.java
@@ -0,0 +1,180 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.sling.models.impl;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.sling.api.SlingHttpServletRequest;
+import org.apache.sling.api.resource.Resource;
+import org.apache.sling.api.resource.ValueMap;
+import org.apache.sling.api.scripting.SlingBindings;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.api.wrappers.ValueMapDecorator;
+import org.apache.sling.models.impl.injectors.BindingsInjector;
+import org.apache.sling.models.impl.injectors.ChildResourceInjector;
+import org.apache.sling.models.impl.injectors.OSGiServiceInjector;
+import org.apache.sling.models.impl.injectors.RequestAttributeInjector;
+import org.apache.sling.models.impl.injectors.ValueMapInjector;
+import org.apache.sling.models.testmodels.classes.InjectorSpecificAnnotationModel;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.service.component.ComponentContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@RunWith(MockitoJUnitRunner.class)
+public class InjectorSpecificAnnotationTest {
+
+    @Mock
+    private ComponentContext componentCtx;
+
+    @Mock
+    private BundleContext bundleContext;
+
+    @Mock
+    private SlingHttpServletRequest request;
+
+    @Mock
+    private Logger log;
+
+    private ModelAdapterFactory factory;
+
+    private OSGiServiceInjector osgiInjector;
+
+    @Before
+    public void setup() {
+        when(componentCtx.getBundleContext()).thenReturn(bundleContext);
+        factory = new ModelAdapterFactory();
+        factory.activate(componentCtx);
+
+        osgiInjector = new OSGiServiceInjector();
+        osgiInjector.activate(componentCtx);
+
+        factory.bindInjector(new BindingsInjector(),
+                Collections.<String, Object> singletonMap(Constants.SERVICE_ID, 1L));
+        factory.bindInjector(new ValueMapInjector(),
+                Collections.<String, Object> singletonMap(Constants.SERVICE_ID, 2L));
+        factory.bindInjector(new ChildResourceInjector(),
+                Collections.<String, Object> singletonMap(Constants.SERVICE_ID, 3L));
+        factory.bindInjector(new RequestAttributeInjector(),
+                Collections.<String, Object> singletonMap(Constants.SERVICE_ID, 4L));
+        factory.bindInjector(osgiInjector, Collections.<String, Object> singletonMap(Constants.SERVICE_ID, 5L));
+        SlingBindings bindings = new SlingBindings();
+        bindings.setLog(log);
+        Mockito.when(request.getAttribute(SlingBindings.class.getName())).thenReturn(bindings);
+
+    }
+
+    @Test
+    public void testSimpleValueModel() {
+        Map<String, Object> map = new HashMap<String, Object>();
+        map.put("first", "first-value");
+        map.put("second", "second-value");
+        ValueMap vm = new ValueMapDecorator(map);
+
+        Resource res = mock(Resource.class);
+        when(res.adaptTo(ValueMap.class)).thenReturn(vm);
+        when(request.getResource()).thenReturn(res);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals("first-value", model.getFirst());
+        assertEquals("second-value", model.getSecond());
+    }
+
+    @Test
+    public void testOrderForValueAnnotation() {
+        // make sure that that the correct injection is used
+        // make sure that log is adapted from value map
+        // and not coming from request attribute
+        Logger logFromValueMap = LoggerFactory.getLogger(this.getClass());
+
+        Map<String, Object> map = new HashMap<String, Object>();
+        map.put("first", "first-value");
+        map.put("log", logFromValueMap);
+        ValueMap vm = new ValueMapDecorator(map);
+
+        Resource res = mock(Resource.class);
+        when(res.adaptTo(ValueMap.class)).thenReturn(vm);
+        when(request.getResource()).thenReturn(res);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals("first-value", model.getFirst());
+        assertEquals(logFromValueMap, model.getLog());
+    }
+
+    @Test
+    public void testOSGiService() throws InvalidSyntaxException {
+        ServiceReference ref = mock(ServiceReference.class);
+        Logger log = mock(Logger.class);
+        when(bundleContext.getServiceReferences(Logger.class.getName(), null)).thenReturn(
+                new ServiceReference[] { ref });
+        when(bundleContext.getService(ref)).thenReturn(log);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals(log, model.getService());
+    }
+
+    @Test
+    public void testScriptVariable() throws InvalidSyntaxException {
+        SlingBindings bindings = new SlingBindings();
+        SlingScriptHelper helper = mock(SlingScriptHelper.class);
+        bindings.setSling(helper);
+        when(request.getAttribute(SlingBindings.class.getName())).thenReturn(bindings);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals(helper, model.getHelper());
+    }
+
+    @Test
+    public void testRequestAttribute() throws InvalidSyntaxException {
+        Object attribute = new Object();
+        when(request.getAttribute("attribute")).thenReturn(attribute);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals(attribute, model.getRequestAttribute());
+    }
+
+    @Test
+    public void testChildResource() {
+        Resource res = mock(Resource.class);
+        Resource child = mock(Resource.class);
+        when(res.getChild("child1")).thenReturn(child);
+        when(request.getResource()).thenReturn(res);
+
+        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);
+        assertNotNull("Could not instanciate model", model);
+        assertEquals(child, model.getChildResource());
+    }
+}
diff --git a/src/test/java/org/apache/sling/models/impl/MultipleInjectorTest.java b/src/test/java/org/apache/sling/models/impl/MultipleInjectorTest.java
index b973952..605d750 100644
--- a/src/test/java/org/apache/sling/models/impl/MultipleInjectorTest.java
+++ b/src/test/java/org/apache/sling/models/impl/MultipleInjectorTest.java
@@ -88,6 +88,7 @@ public class MultipleInjectorTest {
         assertEquals(obj.firstAttribute, bindingsValue);
 
         verifyNoMoreInteractions(attributesInjector);
+        verify(bindingsInjector).createAnnotationProcessor(any(), any(AnnotatedElement.class));
         verify(bindingsInjector).getValue(eq(request), eq("firstAttribute"), eq(String.class), any(AnnotatedElement.class), any(DisposalCallbackRegistry.class));
         verifyNoMoreInteractions(bindingsInjector);
     }
diff --git a/src/test/java/org/apache/sling/models/impl/PostConstructTest.java b/src/test/java/org/apache/sling/models/impl/PostConstructTest.java
index 7b59be4..7f54f12 100644
--- a/src/test/java/org/apache/sling/models/impl/PostConstructTest.java
+++ b/src/test/java/org/apache/sling/models/impl/PostConstructTest.java
@@ -49,7 +49,7 @@ public class PostConstructTest {
         ModelAdapterFactory factory = new ModelAdapterFactory();
         factory.activate(componentCtx);
         // no injectors are necessary
-        
+
         SubClass sc = factory.getAdapter(r, SubClass.class);
         assertTrue(sc.getPostConstructCalledTimestampInSub() > sc.getPostConstructCalledTimestampInSuper());
         assertTrue(sc.getPostConstructCalledTimestampInSuper() > 0);
diff --git a/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotation.java b/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotation.java
new file mode 100644
index 0000000..a2c9c55
--- /dev/null
+++ b/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotation.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.sling.models.impl.injector;
+
+import static java.lang.annotation.ElementType.*;
+import static java.lang.annotation.RetentionPolicy.*;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotation;
+
+@Target({ METHOD, FIELD })
+@Retention(RUNTIME)
+@InjectAnnotation
+public @interface CustomAnnotation {
+
+}
diff --git a/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotationInjector.java b/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotationInjector.java
new file mode 100644
index 0000000..053c1e6
--- /dev/null
+++ b/src/test/java/org/apache/sling/models/impl/injector/CustomAnnotationInjector.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.sling.models.impl.injector;
+
+import java.lang.reflect.AnnotatedElement;
+import java.lang.reflect.Type;
+
+import org.apache.sling.models.spi.DisposalCallbackRegistry;
+import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor;
+import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessorFactory;
+
+public class CustomAnnotationInjector implements InjectAnnotationProcessorFactory {
+
+    @Override
+    public String getName() {
+        return "with-annotation";
+    }
+
+    @Override
+    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
+        if (name.equals("customString")) {
+            return "custom value";
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public InjectAnnotationProcessor createAnnotationProcessor(Object adaptable, AnnotatedElement element) {
+        if (element.isAnnotationPresent(CustomAnnotation.class)) {
+            return new Processor();
+        } else {
+            return null;
+        }
+    }
+
+    private class Processor extends AbstractInjectAnnotationProcessor {
+
+        @Override
+        public boolean hasDefault() {
+            return true;
+        }
+
+        @Override
+        public Object getDefault() {
+            return "default value";
+        }
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java b/src/test/java/org/apache/sling/models/impl/injector/SimpleInjector.java
similarity index 64%
copy from src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java
copy to src/test/java/org/apache/sling/models/impl/injector/SimpleInjector.java
index 194db83..316d179 100644
--- a/src/main/java/org/apache/sling/models/impl/injectors/ChildResourceInjector.java
+++ b/src/test/java/org/apache/sling/models/impl/injector/SimpleInjector.java
@@ -14,33 +14,26 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.sling.models.impl.injectors;
+package org.apache.sling.models.impl.injector;
 
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Type;
 
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Property;
-import org.apache.felix.scr.annotations.Service;
-import org.apache.sling.api.resource.Resource;
 import org.apache.sling.models.spi.DisposalCallbackRegistry;
 import org.apache.sling.models.spi.Injector;
-import org.osgi.framework.Constants;
 
-@Component
-@Service
-@Property(name = Constants.SERVICE_RANKING, intValue = 3000)
-public class ChildResourceInjector implements Injector {
+public class SimpleInjector implements Injector {
 
     @Override
     public String getName() {
-        return "child-resources";
+        return "test";
     }
 
     @Override
-    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element, DisposalCallbackRegistry callbackRegistry) {
-        if (adaptable instanceof Resource) {
-            return ((Resource) adaptable).getChild(name);
+    public Object getValue(Object adaptable, String name, Type declaredType, AnnotatedElement element,
+            DisposalCallbackRegistry callbackRegistry) {
+        if (name.equals("testString") && declaredType.equals(String.class)) {
+            return "test string";
         } else {
             return null;
         }
diff --git a/src/test/java/org/apache/sling/models/testmodels/classes/InjectorSpecificAnnotationModel.java b/src/test/java/org/apache/sling/models/testmodels/classes/InjectorSpecificAnnotationModel.java
new file mode 100644
index 0000000..ecbd32d
--- /dev/null
+++ b/src/test/java/org/apache/sling/models/testmodels/classes/InjectorSpecificAnnotationModel.java
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.sling.models.testmodels.classes;
+
+import org.apache.sling.api.SlingHttpServletRequest;
+import org.apache.sling.api.resource.Resource;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.models.annotations.Model;
+import org.apache.sling.models.annotations.injectorspecific.ChildResource;
+import org.apache.sling.models.annotations.injectorspecific.OSGiService;
+import org.apache.sling.models.annotations.injectorspecific.RequestAttribute;
+import org.apache.sling.models.annotations.injectorspecific.ScriptVariable;
+import org.apache.sling.models.annotations.injectorspecific.ValueMapValue;
+import org.slf4j.Logger;
+
+@Model(adaptables = SlingHttpServletRequest.class)
+public class InjectorSpecificAnnotationModel {
+
+    @ValueMapValue(optional = true)
+    private String first;
+
+    @ValueMapValue(name = "second", optional = true)
+    private String secondWithOtherName;
+
+    @ValueMapValue(optional = true)
+    private Logger log;
+
+    @ScriptVariable(optional = true, name = "sling")
+    private SlingScriptHelper helper;
+
+    @RequestAttribute(optional = true, name = "attribute")
+    private Object requestAttribute;
+
+    @OSGiService(optional = true)
+    private Logger service;
+
+    @ChildResource(optional = true, name = "child1")
+    private Resource childResource;
+
+    public String getFirst() {
+        return first;
+    }
+
+    public String getSecond() {
+        return secondWithOtherName;
+    }
+
+    public Logger getLog() {
+        return log;
+    }
+
+    public Logger getService() {
+        return service;
+    }
+
+    public SlingScriptHelper getHelper() {
+        return helper;
+    }
+
+    public Object getRequestAttribute() {
+        return requestAttribute;
+    }
+
+    public Resource getChildResource() {
+        return childResource;
+    }
+
+}

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