Added update(draft).

pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.helenus</groupId>
     <artifactId>helenus-core</artifactId>
-    <version>2.0.21-SNAPSHOT</version>
+    <version>2.0.23-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>helenus</name>

src/main/java/net/helenus/core/HelenusSession.java

@@ -23,23 +23,27 @@ import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
 import java.io.Closeable;
 import java.io.PrintStream;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Set;
+import java.lang.reflect.Method;
+import java.util.*;
 import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Function;
 import net.helenus.core.operation.*;
 import net.helenus.core.reflect.Drafted;
+import net.helenus.core.reflect.DslExportable;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.HelenusEntity;
+import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.MappingUtil;
 import net.helenus.mapping.value.*;
+import net.helenus.support.DslPropertyException;
 import net.helenus.support.Fun;
 import net.helenus.support.Fun.Tuple1;
 import net.helenus.support.Fun.Tuple2;
 import net.helenus.support.Fun.Tuple6;
 
+import static net.helenus.core.Query.eq;
+
 public final class HelenusSession extends AbstractSessionOperations implements Closeable {
 
   private final int MAX_CACHE_SIZE = 10000;
@@ -385,6 +389,53 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return new UpdateOperation(this);
   }
 
+  public <T> UpdateOperation update(Drafted<T> draft) {
+    UpdateOperation update = new UpdateOperation(this);
+    Map<String, Object> map = draft.toMap();
+    HelenusEntity entity = draft.getEntity();
+    Set<String> mutatedProperties = draft.mutated();
+
+    // Add all the mutated values contained in the draft.
+    entity.getOrderedProperties().forEach(property -> {
+      switch (property.getColumnType()) {
+        case PARTITION_KEY:
+        case CLUSTERING_COLUMN:
+          break;
+        default:
+          String propertyName = property.getPropertyName();
+          if (mutatedProperties.contains(propertyName)) {
+            Object value = map.get(propertyName);
+            Getter<Object> getter = new Getter<Object>() {
+              @Override
+              public Object get() {
+                throw new DslPropertyException(new HelenusPropertyNode(property, Optional.empty()));
+              }
+            };
+            update.set(getter, value);
+          }
+      }
+    });
+
+    // Add the partition and clustering keys if they were in the draft (normally the case).
+    entity.getOrderedProperties().forEach(property -> {
+      switch (property.getColumnType()) {
+        case PARTITION_KEY:
+        case CLUSTERING_COLUMN:
+          String propertyName = property.getPropertyName();
+          Object value = map.get(propertyName);
+          Getter<Object> getter = new Getter<Object>() {
+            @Override
+            public Object get() {
+              throw new DslPropertyException(new HelenusPropertyNode(property, Optional.empty()));
+            }
+          };
+          update.where(getter, eq(value));
+      }
+    });
+
+    return update;
+  }
+
   public <V> UpdateOperation update(Getter<V> getter, V v) {
     Objects.requireNonNull(getter, "field is empty");
     Objects.requireNonNull(v, "value is empty");

src/main/java/net/helenus/core/reflect/Drafted.java

@@ -1,9 +1,13 @@
 package net.helenus.core.reflect;
 
+import net.helenus.mapping.HelenusEntity;
+
 import java.util.Set;
 
 public interface Drafted<T> extends MapExportable {
 
+  HelenusEntity getEntity();
+
   Set<String> mutated();
 
   T build();

src/test/java/net/helenus/test/integration/core/simple/SimpleUserTest.java

@@ -20,12 +20,19 @@ import static net.helenus.core.Query.eq;
 import net.helenus.core.Helenus;
 import net.helenus.core.HelenusSession;
 import net.helenus.core.Operator;
+import net.helenus.core.reflect.Drafted;
+import net.helenus.mapping.HelenusEntity;
 import net.helenus.support.Fun;
 import net.helenus.test.integration.build.AbstractEmbeddedCassandraTest;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
 
 public class SimpleUserTest extends AbstractEmbeddedCassandraTest {
 
@@ -150,7 +157,7 @@ public class SimpleUserTest extends AbstractEmbeddedCassandraTest {
     name =
         (String)
             session
-                .select()
+                .<Fun.ArrayTuple>select()
                 .column(user::name)
                 .where(user::id, eq(100L))
                 .sync()
@@ -162,6 +169,34 @@ public class SimpleUserTest extends AbstractEmbeddedCassandraTest {
 
     // UPDATE
 
+    session.update(new Drafted<User>() {
+
+      @Override
+      public HelenusEntity getEntity() { return Helenus.entity(User.class); }
+
+      @Override
+      public Map<String, Object> toMap() {
+        HashMap<String, Object> map = new HashMap<String, Object>();
+        map.put("name", "joeseph");
+        map.put("age", Integer.valueOf(45));
+        map.put("id", 100L);
+        return map;
+      }
+
+      @Override
+      public Set<String> mutated() {
+        Set<String> set = new HashSet<String>();
+        set.add("name");
+        set.add("age");
+        return set;
+      }
+
+      @Override
+      public User build() {
+        return null;
+      }
+    }).sync();
+
     session
             .update(user::name, "albert")
             .set(user::age, 35)

src/test/java/net/helenus/test/unit/core/dsl/Account.java

@@ -19,6 +19,7 @@ import java.util.Date;
 import java.util.Map;
 import java.util.Set;
 import net.helenus.core.reflect.Drafted;
+import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.annotation.*;
 
 @Table
@@ -40,6 +41,10 @@ public interface Account {
   }
 
   class Draft implements Drafted { //TODO
+
+    @Override
+    public HelenusEntity getEntity() { return null; }
+
     @Override
     public Set<String> mutated() {
       return null;