GH-38997: [Java] Modularize format and vector

java/dataset/src/test/java/org/apache/arrow/dataset/TestAllTypes.java

@@ -32,7 +32,6 @@
 import org.apache.arrow.dataset.file.DatasetFileWriter;
 import org.apache.arrow.dataset.file.FileFormat;
 import org.apache.arrow.memory.BufferAllocator;
-import org.apache.arrow.util.ArrowTestDataUtil;
 import org.apache.arrow.vector.BigIntVector;
 import org.apache.arrow.vector.BitVector;
 import org.apache.arrow.vector.DateMilliVector;
@@ -76,6 +75,7 @@
 import org.apache.arrow.vector.types.pojo.Field;
 import org.apache.arrow.vector.types.pojo.FieldType;
 import org.apache.arrow.vector.types.pojo.Schema;
+import org.apache.arrow.vector.util.ArrowTestDataUtil;
 import org.apache.arrow.vector.util.ByteArrayReadableSeekableByteChannel;
 import org.apache.arrow.vector.util.Text;
 import org.junit.ClassRule;

java/flight/flight-core/src/test/java/org/apache/arrow/flight/FlightTestUtil.java

@@ -25,7 +25,7 @@
 import java.util.List;
 import java.util.Random;
 
-import org.apache.arrow.util.ArrowTestDataUtil;
+import org.apache.arrow.vector.util.ArrowTestDataUtil;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.function.Executable;
 

java/format/src/main/java/module-info.java

@@ -0,0 +1,21 @@
+/*
+ * 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.
+ */
+
+module org.apache.arrow.format {
+ exports org.apache.arrow.flatbuf;
+ requires transitive flatbuffers.java;
+}

java/vector/pom.xml

@@ -30,6 +30,10 @@
  <groupId>org.apache.arrow</groupId>
  <artifactId>arrow-memory-core</artifactId>
  </dependency>
+ <dependency>
+ <groupId>org.immutables</groupId>
+ <artifactId>value</artifactId>
+ </dependency>
  <dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-core</artifactId>

java/vector/src/main/codegen/includes/vv_imports.ftl

@@ -48,9 +48,6 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.nio.ByteBuffer;
 
-import java.sql.Date;
-import java.sql.Time;
-import java.sql.Timestamp;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.time.Duration;

java/vector/src/main/java/module-info.java

@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+
+module org.apache.arrow.vector {
+ exports org.apache.arrow.vector;
+ exports org.apache.arrow.vector.compare;
+ exports org.apache.arrow.vector.compare.util;
+ exports org.apache.arrow.vector.complex;
+ exports org.apache.arrow.vector.complex.impl;
+ exports org.apache.arrow.vector.complex.reader;
+ exports org.apache.arrow.vector.complex.writer;
+ exports org.apache.arrow.vector.compression;
+ exports org.apache.arrow.vector.dictionary;
+ exports org.apache.arrow.vector.holders;
+ exports org.apache.arrow.vector.ipc;
+ exports org.apache.arrow.vector.ipc.message;
+ exports org.apache.arrow.vector.table;
+ exports org.apache.arrow.vector.types;
+ exports org.apache.arrow.vector.types.pojo;
+ exports org.apache.arrow.vector.util;
+ exports org.apache.arrow.vector.validate;
+
+ opens org.apache.arrow.vector.types.pojo to com.fasterxml.jackson.databind;
+
+ requires com.fasterxml.jackson.annotation;
+ requires com.fasterxml.jackson.core;
+ requires com.fasterxml.jackson.databind;
+ requires com.fasterxml.jackson.datatype.jsr310;
+ requires flatbuffers.java;
+ requires jdk.unsupported;
+ requires org.apache.arrow.format;
+ requires org.apache.arrow.memory.core;
+ requires org.apache.commons.codec;
+ requires org.eclipse.collections.impl;
+ requires org.slf4j;
+}

java/vector/src/test/java/org/apache/arrow/util/ArrowTestDataUtil.java → java/vector/src/test/java/org/apache/arrow/vector/util/ArrowTestDataUtil.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.arrow.util;
+package org.apache.arrow.vector.util;
 
 import java.nio.file.Path;
 import java.nio.file.Paths;

java/vector/src/test/java/org/apache/arrow/util/TestSchemaUtil.java → java/vector/src/test/java/org/apache/arrow/vector/util/TestSchemaUtil.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.arrow.util;
+package org.apache.arrow.vector.util;
 
 import static java.util.Arrays.asList;
 import static org.junit.Assert.assertEquals;