Added builder for Neo4jWriter

resolves BATCH-2611

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/data/Neo4jItemWriter.java

@@ -39,6 +39,7 @@ import org.springframework.util.CollectionUtils;
  * </p>
  *
  * @author Michael Minella
+ * @author Glenn Renfro
  *
  */
 public class Neo4jItemWriter<T> implements ItemWriter<T>, InitializingBean {
@@ -50,10 +51,21 @@ public class Neo4jItemWriter<T> implements ItemWriter<T>, InitializingBean {
 
 	private SessionFactory sessionFactory;
 
+	/**
+	 * Boolean flag indicating whether the writer should save or delete the item at write
+	 * time.
+	 * @param delete true if write should delete item, false if item should be saved.
+	 * Default is false.
+	 */
 	public void setDelete(boolean delete) {
 		this.delete = delete;
 	}
 
+	/**
+	 * Establish the session factory that will be used to create {@link Session} instances
+	 * for interacting with Neo4j.
+	 * @param sessionFactory sessionFactory to be used.
+	 */
 	public void setSessionFactory(SessionFactory sessionFactory) {
 		this.sessionFactory = sessionFactory;
 	}

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/data/builder/Neo4jItemWriterBuilder.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2017 the original author or authors.
+ *  
+ *  Licensed 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.springframework.batch.item.data.builder;
+
+import org.neo4j.ogm.session.Session;
+import org.neo4j.ogm.session.SessionFactory;
+
+import org.springframework.batch.item.data.Neo4jItemWriter;
+import org.springframework.util.Assert;
+
+/**
+ * A builder implementation for the {@link Neo4jItemWriter}
+ *
+ * @author Glenn Renfro
+ * @since 4.0
+ * @see Neo4jItemWriter
+ */
+public class Neo4jItemWriterBuilder<T> {
+
+	private boolean delete = false;
+
+	private SessionFactory sessionFactory;
+
+	/**
+	 * Boolean flag indicating whether the writer should save or delete the item at write
+	 * time.
+	 * @param delete true if write should delete item, false if item should be saved.
+	 * Default is false.
+	 * @return The current instance of the builder
+	 * @see Neo4jItemWriter#setDelete(boolean)
+	 */
+	public Neo4jItemWriterBuilder<T> delete(boolean delete) {
+		this.delete = delete;
+
+		return this;
+	}
+
+	/**
+	 * Establish the session factory that will be used to create {@link Session} instances
+	 * for interacting with Neo4j.
+	 * @param sessionFactory sessionFactory to be used.
+	 * @return The current instance of the builder
+	 * @see Neo4jItemWriter#setSessionFactory(SessionFactory)
+	 */
+	public Neo4jItemWriterBuilder<T> sessionFactory(SessionFactory sessionFactory) {
+		this.sessionFactory = sessionFactory;
+
+		return this;
+	}
+
+	/**
+	 * Validates and builds a {@link org.springframework.batch.item.data.Neo4jItemWriter}.
+	 *
+	 * @return a {@link Neo4jItemWriter}
+	 */
+	public Neo4jItemWriter<T> build() {
+		Assert.notNull(sessionFactory, "sessionFactory is required.");
+		Neo4jItemWriter<T> writer = new Neo4jItemWriter<>();
+		writer.setDelete(this.delete);
+		writer.setSessionFactory(this.sessionFactory);
+		return writer;
+	}
+}