Refactor @PrimaryKey and @PrimaryKeyColumn to be aliases for @Column.

Both annotations are now aliases for `@Column`.

Closes #1476

Author: mp911de

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/mapping/BasicCassandraPersistentProperty.java

@@ -166,33 +166,13 @@ private CqlIdentifier determineColumnName() {
 		}
 
 		String overriddenName = null;
-
 		boolean forceQuote = false;
 
-		if (isIdProperty()) { // then the id is of a simple type (since it's not a composite primary key)
-
-			PrimaryKey primaryKey = findAnnotation(PrimaryKey.class);
-
-			if (primaryKey != null) {
-				overriddenName = primaryKey.value();
-				forceQuote = primaryKey.forceQuote();
-			}
-		} else if (isPrimaryKeyColumn()) { // then it's a simple type
-
-			PrimaryKeyColumn primaryKeyColumn = findAnnotation(PrimaryKeyColumn.class);
+		Column column = findAnnotation(Column.class);
 
-			if (primaryKeyColumn != null) {
-				overriddenName = primaryKeyColumn.value();
-				forceQuote = primaryKeyColumn.forceQuote();
-			}
-		} else { // then it's a vanilla column with the assumption that it's mapped to a single column
-
-			Column column = findAnnotation(Column.class);
-
-			if (column != null) {
-				overriddenName = column.value();
-				forceQuote = column.forceQuote();
-			}
+		if (column != null) {
+			overriddenName = column.value();
+			forceQuote = column.forceQuote();
 		}
 
 		return namingAccessor.generate(overriddenName, forceQuote, NamingStrategy::getColumnName, this, this.spelContext);
@@ -205,23 +185,8 @@ public boolean hasExplicitColumnName() {
 			return false;
 		}
 
-		if (isIdProperty()) { // then the id is of a simple type (since it's not a composite primary key)
-
-			PrimaryKey primaryKey = findAnnotation(PrimaryKey.class);
-
-			return primaryKey != null && !ObjectUtils.isEmpty(primaryKey.value());
-
-		} else if (isPrimaryKeyColumn()) { // then it's a simple type
-
-			PrimaryKeyColumn primaryKeyColumn = findAnnotation(PrimaryKeyColumn.class);
-
-			return primaryKeyColumn != null && !ObjectUtils.isEmpty(primaryKeyColumn.value());
-		} else { // then it's a vanilla column with the assumption that it's mapped to a single column
-
-			Column column = findAnnotation(Column.class);
-
-			return column != null && !ObjectUtils.isEmpty(column.value());
-		}
+		Column column = findAnnotation(Column.class);
+		return column != null && !ObjectUtils.isEmpty(column.value());
 	}
 
 	@Override

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/mapping/PrimaryKey.java

@@ -21,6 +21,7 @@
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.springframework.core.annotation.AliasFor;
 import org.springframework.data.annotation.Id;
 
 /**
@@ -43,11 +44,13 @@
 @Retention(value = RetentionPolicy.RUNTIME)
 @Target(value = { ElementType.ANNOTATION_TYPE, ElementType.FIELD, ElementType.METHOD })
 @Id
+@Column
 public @interface PrimaryKey {
 
 	/**
 	 * The column name for the primary key if it is of a simple type, else ignored.
 	 */
+	@AliasFor(annotation = Column.class, attribute = "value")
 	String value() default "";
 
 	/**
@@ -58,5 +61,6 @@
 	 * @see com.datastax.oss.driver.api.core.CqlIdentifier#fromInternal(String)
 	 */
 	@Deprecated
+	@AliasFor(annotation = Column.class, attribute = "forceQuote")
 	boolean forceQuote() default false;
 }

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/mapping/PrimaryKeyColumn.java

@@ -40,18 +40,19 @@
 @Documented
 @Retention(value = RetentionPolicy.RUNTIME)
 @Target(value = { ElementType.ANNOTATION_TYPE, ElementType.FIELD, ElementType.METHOD })
+@Column
 public @interface PrimaryKeyColumn {
 
 	/**
 	 * The name of the column in the table.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor(annotation = Column.class, attribute = "value")
 	String value() default "";
 
 	/**
 	 * The name of the column in the table.
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor(annotation = Column.class, attribute = "value")
 	String name() default "";
 
 	/**
@@ -78,5 +79,6 @@
 	 * @see com.datastax.oss.driver.api.core.CqlIdentifier#fromInternal(String)
 	 */
 	@Deprecated
+	@AliasFor(annotation = Column.class, attribute = "forceQuote")
 	boolean forceQuote() default false;
 }

spring-data-cassandra/src/test/java/org/springframework/data/cassandra/core/mapping/BasicCassandraPersistentPropertyUnitTests.java

@@ -48,6 +48,8 @@ class BasicCassandraPersistentPropertyUnitTests {
 	@Test
 	void usesAnnotatedColumnName() {
 		assertThat(getPropertyFor(Timeline.class, "text").getRequiredColumnName()).hasToString("message");
+		assertThat(getPropertyFor(Timeline.class, "pkValue").getRequiredColumnName()).hasToString("val");
+		assertThat(getPropertyFor(Timeline.class, "pkName").getRequiredColumnName()).hasToString("val");
 	}
 
 	@Test
@@ -180,6 +182,10 @@ private static class Timeline {
 		String keyspace;
 
 		@Column("table") String table;
+
+		@PrimaryKeyColumn(value = "val") String pkValue;
+
+		@PrimaryKeyColumn(name = "val") String pkName;
 	}
 
 	@Retention(RetentionPolicy.RUNTIME)