HSEARCH-1271 Adding toString implementations for easier debugging

engine/src/main/java/org/hibernate/search/backend/spi/Work.java

@@ -29,6 +29,7 @@
  * A unit of work. Only make sense inside the same session since it uses the scope principle.
  *
  * @author Emmanuel Bernard
+ * @author Hardy Ferentschik
  */
 public class Work<T> {
 	private final T entity;
@@ -54,7 +55,7 @@ public Work(T entity, WorkType type) {
 	}
 
 	private Work(T entity, Class<T> entityClass, Serializable id,
-				WorkType type, boolean identifierWasRolledBack) {
+			WorkType type, boolean identifierWasRolledBack) {
 		this.entity = entity;
 		this.entityClass = entityClass;
 		this.id = id;
@@ -81,4 +82,14 @@ public WorkType getType() {
 	public boolean isIdentifierWasRolledBack() {
 		return identifierWasRolledBack;
 	}
+
+	@Override
+	public String toString() {
+		final StringBuilder sb = new StringBuilder( "Work{" );
+		sb.append( "entityClass=" ).append( entityClass );
+		sb.append( ", id=" ).append( id );
+		sb.append( ", type=" ).append( type );
+		sb.append( '}' );
+		return sb.toString();
+	}
 }

engine/src/main/java/org/hibernate/search/engine/spi/AbstractDocumentBuilder.java

@@ -273,6 +273,10 @@ private DepthValidator updateDepth(Object instance, ContainedInMetadata containe
 		}
 	}
 
+	@Override
+	public String toString() {
+		return "DocumentBuilder for {" + beanClass.getName() + "}";
+	}
 
 	/**
 	 * A {@code XMember } instance treats a map as a collection as well in which case the map values are returned as