#1011 - Create valid migration scripts for non-Postgres databases and @DbArray columns.

Merge branch 'test/dbarray-create-migration' of https://github.com/FOCONIS/ebean into FOCONIS-test/dbarray-create-migration

commit 3a8f32b173
Author: Michael Benz <michael.benz@foconis.de>
Date:   Wed Apr 19 18:16:51 2017 +0200

    adding dbmigration ddlgeneration test for Ebean @DbArray extension.

src/main/java/io/ebean/dbmigration/ddlgeneration/platform/H2Ddl.java

@@ -12,4 +12,8 @@ public class H2Ddl extends PlatformDdl {
     this.historyDdl = new H2HistoryDdl();
   }
 
+  @Override
+  protected String convertArrayType(String logicalArrayType) {
+    return "array";
+  }
 }

src/main/java/io/ebean/dbmigration/ddlgeneration/platform/PlatformDdl.java

@@ -99,6 +99,8 @@ public class PlatformDdl {
 
   protected final DbDefaultValue dbDefaultValue;
 
+  protected String fallbackArrayType = "varchar(1000)";
+
   public PlatformDdl(DatabasePlatform platform) {
     this.platform = platform;
     this.dbIdentity = platform.getDbIdentity();
@@ -215,10 +217,24 @@ public class PlatformDdl {
    * Convert the standard type to the platform specific type.
    */
   public String convert(String type, boolean identity) {
+    if (type.contains("[]")) {
+      return convertArrayType(type);
+    }
     String platformType = typeConverter.convert(type);
     return identity ? asIdentityColumn(platformType) : platformType;
   }
 
+  /**
+   * Convert the logical array type to a db platform specific type to support the array data.
+   */
+  protected String convertArrayType(String logicalArrayType) {
+    if (logicalArrayType.endsWith("]")) {
+      return fallbackArrayType;
+    }
+    int colonPos = logicalArrayType.lastIndexOf(']');
+    return "varchar" + logicalArrayType.substring(colonPos + 1);
+  }
+
   /**
    * Add history support to this table using the platform specific mechanism.
    */

src/main/java/io/ebean/dbmigration/ddlgeneration/platform/PostgresDdl.java

@@ -16,6 +16,17 @@ public class PostgresDdl extends PlatformDdl {
     this.columnSetNull = "drop not null";
   }
 
+  @Override
+  protected String convertArrayType(String logicalArrayType) {
+    int colonPos = logicalArrayType.lastIndexOf(']');
+    if (colonPos == -1) {
+      return logicalArrayType;
+    } else {
+      // trim of the fallback varchar length
+      return logicalArrayType.substring(0, colonPos + 1);
+    }
+  }
+
   /**
    * Map bigint, integer and smallint into their equivalent serial types.
    */

src/main/java/io/ebeaninternal/server/deploy/parse/DeployUtil.java

@@ -245,13 +245,15 @@ public class DeployUtil {
     prop.setDbType(dbType);
     prop.setScalarType(scalarType);
     if (scalarType instanceof ScalarTypeArray) {
-      prop.setDbColumnDefn(((ScalarTypeArray) scalarType).getDbColumnDefn());
-    }
-    if (dbType == Types.VARCHAR) {
-      // determine the db column size
-      int dbLength = dbArray.length();
-      int columnLength = (dbLength > 0) ? dbLength : DEFAULT_ARRAY_VARCHAR_LENGTH;
-      prop.setDbLength(columnLength);
+      String columnDefn = ((ScalarTypeArray) scalarType).getDbColumnDefn();
+      if (dbArray.length() > 0) {
+        // fallback varchar column length when ARRAY not support by DB
+        columnDefn += "(" + dbArray.length() + ")";
+      }
+      prop.setDbLength(dbArray.length());
+      prop.setDbColumnDefn(columnDefn);
+    } else {
+      throw new RuntimeException("Not mapped to ScalarTypeArray? " + scalarType.getClass());
     }
   }
 

src/main/java/io/ebeaninternal/server/type/ScalarTypeArrayListH2.java

@@ -52,11 +52,6 @@ class ScalarTypeArrayListH2 extends ScalarTypeArrayList {
     super(arrayType, docPropertyType, converter);
   }
 
-  @Override
-  public String getDbColumnDefn() {
-    return "array";
-  }
-
   @Override
   public void bind(DataBind bind, List value) throws SQLException {
     if (value == null) {

src/main/java/io/ebeaninternal/server/type/ScalarTypeArraySetH2.java

@@ -52,11 +52,6 @@ class ScalarTypeArraySetH2 extends ScalarTypeArraySet {
     super(arrayType, docPropertyType, converter);
   }
 
-  @Override
-  public String getDbColumnDefn() {
-    return "array";
-  }
-
   @Override
   public void bind(DataBind bind, Set value) throws SQLException {
     if (value == null) {

src/main/java/io/ebeaninternal/server/type/ScalarTypeJsonCollection.java

@@ -6,7 +6,7 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 
-abstract class ScalarTypeJsonCollection<T> extends ScalarTypeBase<T> {
+abstract class ScalarTypeJsonCollection<T> extends ScalarTypeBase<T> implements ScalarTypeArray {
 
   protected DocPropertyType docPropertyType;
 
@@ -15,6 +15,23 @@ abstract class ScalarTypeJsonCollection<T> extends ScalarTypeBase<T> {
     this.docPropertyType = docPropertyType;
   }
 
+  /**
+   * Return the logical db column definition based on the element document type.
+   */
+  @Override
+  public String getDbColumnDefn() {
+    switch (docPropertyType) {
+      case SHORT:
+      case INTEGER:
+      case LONG:
+        return "integer[]";
+      case DOUBLE:
+      case FLOAT:
+        return "decimal[]";
+    }
+    return "varchar[]";
+  }
+
   /**
    * Consider as a mutable type. Use the isDirty() method to check for dirty state.
    */