added format and pattern support for date fieldtype + fixed nullpointer when TransportClientFactoryBean configuration is java config only.

src/test/java/org/springframework/data/elasticsearch/SampleDateMappingEntity.java

@@ -0,0 +1,73 @@
+package org.springframework.data.elasticsearch;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.elasticsearch.annotations.DateFormat;
+import org.springframework.data.elasticsearch.annotations.Document;
+import org.springframework.data.elasticsearch.annotations.Field;
+
+import java.util.Date;
+
+import static org.springframework.data.elasticsearch.annotations.FieldIndex.not_analyzed;
+import static org.springframework.data.elasticsearch.annotations.FieldType.String;
+import static org.springframework.data.elasticsearch.annotations.FieldType.Date;
+
+/**
+ * @author Jakub Vavrik
+ */
+@Document(indexName = "test-datemapping", type = "mapping", indexStoreType = "memory", shards = 1, replicas = 0, refreshInterval = "-1")
+public class SampleDateMappingEntity {
+    @Id
+    private String id;
+
+    @Field(type = String, index = not_analyzed, store = true, searchAnalyzer = "standard", indexAnalyzer = "standard")
+    private String message;
+
+    @Field(type = Date, format = DateFormat.custom, pattern = "dd.MM.yyyy hh:mm")
+    private Date customFormatDate;
+
+    @Field(type = Date)
+    private Date defaultFormatDate;
+
+    @Field(type = Date, format = DateFormat.basic_date)
+    private Date basicFormatDate;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public Date getCustomFormatDate() {
+        return customFormatDate;
+    }
+
+    public void setCustomFormatDate(Date customFormatDate) {
+        this.customFormatDate = customFormatDate;
+    }
+
+    public Date getDefaultFormatDate() {
+        return defaultFormatDate;
+    }
+
+    public void setDefaultFormatDate(Date defaultFormatDate) {
+        this.defaultFormatDate = defaultFormatDate;
+    }
+
+    public Date getBasicFormatDate() {
+        return basicFormatDate;
+    }
+
+    public void setBasicFormatDate(Date basicFormatDate) {
+        this.basicFormatDate = basicFormatDate;
+    }
+}

src/test/java/org/springframework/data/elasticsearch/core/SimpleElasticsearchDateMappingTest.java

@@ -0,0 +1,26 @@
+package org.springframework.data.elasticsearch.core;
+
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.junit.Assert;
+import org.junit.Test;
+import org.springframework.data.elasticsearch.SampleDateMappingEntity;
+
+import java.beans.IntrospectionException;
+import java.io.IOException;
+
+/**
+ * @author Jakub Vavrik
+ */
+public class SimpleElasticsearchDateMappingTest {
+    private static final String EXPECTED_MAPPING = "{\"mapping\":{\"properties\":{\"message\":{\"store\":true," +
+            "\"type\":\"string\",\"index\":\"not_analyzed\",\"search_analyzer\":\"standard\",\"index_analyzer\"" +
+            ":\"standard\"},\"customFormatDate\":{\"store\":false,\"type\":\"date\",\"format\":\"dd.MM.yyyy hh:mm\"}," +
+            "\"defaultFormatDate\":{\"store\":false,\"type\":\"date\"},\"basicFormatDate\":{\"store\":false,\"" +
+            "type\":\"date\",\"format\":\"basic_date\"}}}}";
+
+    @Test
+    public void testCorrectDateMappings() throws NoSuchFieldException, IntrospectionException, IOException {
+        XContentBuilder xContentBuilder = MappingBuilder.buildMapping(SampleDateMappingEntity.class, "mapping", "id");
+        Assert.assertEquals(EXPECTED_MAPPING, xContentBuilder.string());
+    }
+}