Collect the DB schemas in the model via MTable

src/main/java/io/ebeaninternal/dbmigration/model/MTable.java

@@ -1,7 +1,6 @@
 package io.ebeaninternal.dbmigration.model;
 
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.DdlHelp;
-import io.ebeaninternal.dbmigration.ddlgeneration.platform.SplitColumns;
 import io.ebeaninternal.dbmigration.migration.AddColumn;
 import io.ebeaninternal.dbmigration.migration.AddHistoryTable;
 import io.ebeaninternal.dbmigration.migration.AddTableComment;
@@ -34,15 +33,12 @@ import static io.ebeaninternal.dbmigration.ddlgeneration.platform.SplitColumns.s
  * <p>
  * This effectively represents a table, its columns and all associated
  * constraints, foreign keys and indexes.
- * </p>
  * <p>
  * Migrations can be applied to this such that it represents the state
  * of a given table after various migrations have been applied.
- * </p>
  * <p>
  * This table model can also be derived from the EbeanServer bean descriptor
  * and associated properties.
- * </p>
  */
 public class MTable {
 
@@ -420,6 +416,11 @@ public class MTable {
     return name;
   }
 
+  public String getSchema() {
+    int pos = name.indexOf('.');
+    return pos == -1 ? null : name.substring(0, pos);
+  }
+
   /**
    * Return true if this table is a 'Draft' table.
    */

src/main/java/io/ebeaninternal/dbmigration/model/ModelContainer.java

@@ -24,6 +24,8 @@ import java.util.Collection;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
 
 /**
  * Holds all the tables, views, indexes etc that represent the model.
@@ -33,6 +35,8 @@ import java.util.Map;
  */
 public class ModelContainer {
 
+  private final Set<String> schemas = new TreeSet<>();
+
   /**
    * All the tables in the model.
    */
@@ -50,6 +54,13 @@ public class ModelContainer {
   public ModelContainer() {
   }
 
+  /**
+   * Return the schemas.
+   */
+  public Set<String> getSchemas() {
+    return schemas;
+  }
+
   /**
    * Return true if the model contains tables that are partitioned.
    */
@@ -310,6 +321,10 @@ public class ModelContainer {
     if (table.isPartitioned()) {
       partitionedTables.add(table);
     }
+    String schema = table.getSchema();
+    if (schema != null) {
+      schemas.add(schema);
+    }
     return tables.put(table.getName(), table);
   }
 

src/test/java/io/ebeaninternal/dbmigration/model/MTableTest.java

@@ -11,6 +11,8 @@ import org.junit.Test;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
 
 public class MTableTest {
 
@@ -53,6 +55,16 @@ public class MTableTest {
     return table;
   }
 
+  @Test
+  public void schema() {
+    MTable table = new MTable("tab");
+    assertNull(table.getSchema());
+
+    table = new MTable("foo.tab");
+    assertEquals("foo", table.getSchema());
+    assertEquals("foo.tab", table.getName());
+  }
+
   @Test
   public void test_allHistoryColumns() throws Exception {
 

src/test/java/io/ebeaninternal/dbmigration/model/ModelContainerTest.java

@@ -10,6 +10,7 @@ import io.ebeaninternal.dbmigration.migrationreader.MigrationXmlReader;
 import org.junit.Test;
 
 import java.util.List;
+import java.util.Set;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -153,6 +154,22 @@ public class ModelContainerTest {
     container.applyChange(dropHistoryTable);
   }
 
+  @Test
+  public void getSchemas() {
+
+    MTable t0 = new MTable("foo.one");
+    MTable t1 = new MTable("foo.two");
+    MTable t2 = new MTable("bar.three");
+
+    ModelContainer container = new ModelContainer();
+    container.addTable(t0);
+    container.addTable(t1);
+    container.addTable(t2);
+
+    final Set<String> schemas = container.getSchemas();
+    assertThat(schemas).containsExactly("bar","foo");
+  }
+
   private ModelContainer container_2_1() {
     ModelContainer container = new ModelContainer();
     container.apply(mig("2.0.model.xml"), ver("2.0"));