schemacrawler.schema.Schema Java Examples

/**
 * create the entityspecs and nodespecs.
 * @param catalog
 */
private void firstPass(Catalog catalog) {
    LOG.debug("First pass...");
    for (Schema schema: catalog.getSchemas()) {
      LOG.debug("Processing schema...");
      for (Table table: catalog.getTables(schema)) {
         if (exclusionRules.excludeTable(table)) {
          continue;
         }
        LOG.debug("Processing table {}", table.getName());
        EntitySpec espec = toEntitySpec(table);
        entitySpecs.put(table, espec);
        spec.add( espec );
      }
    }

}
 

@Override
public void validateDatabase(Catalog database, final PhysicalSchema physicalSchema) {
    MutableCollection<Schema> schemasWithIncorrectCatalog = CollectionAdapter.adapt(database.getSchemas()).reject(each -> each.getCatalogName().equals(physicalSchema.getPhysicalName()));

    if (schemasWithIncorrectCatalog.notEmpty()) {
        throw new IllegalArgumentException("Returned ASE schemas should be in " + physicalSchema.getPhysicalName() + " catalog; however, these were not: " + schemasWithIncorrectCatalog);
    }
}
 

@Override
public void validateDatabase(Catalog database, final PhysicalSchema physicalSchema) {
    MutableCollection<Schema> schemasWithIncorrectCatalog = CollectionAdapter.adapt(database.getSchemas()).reject(new Predicate<Schema>() {
        @Override
        public boolean accept(Schema each) {
            return each.getCatalogName().equals(physicalSchema.getPhysicalName());
        }
    });

    if (schemasWithIncorrectCatalog.notEmpty()) {
        throw new IllegalArgumentException("Returned ASE schemas should be in " + physicalSchema.getPhysicalName() + " catalog; however, these were not: " + schemasWithIncorrectCatalog);
    }
}
 

public static void main(String[] args) throws SQLException, SchemaCrawlerException, ClassNotFoundException {

        Driver driver = DriverManager.getDriver("jdbc:derby:memory:test;create=true");
        Connection connection = DriverManager.getConnection("jdbc:derby:memory:test;create=true", new Properties());
        Statement statement = connection.createStatement();
        // id INT NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 0, INCREMENT BY 1)
        statement.execute("CREATE TABLE USERS (id INT NOT NULL, name varchar(20), constraint users_pk_id primary key(id))");
        statement.execute("CREATE TABLE FRIENDS (id1 INT, id2 INT, " +
                " constraint fk_users_id1 foreign key(id1) references users(id)," +
                " constraint fk_users_id2 foreign key(id2) references users(id)" +
                ")");

        final SchemaCrawlerOptions options = new SchemaCrawlerOptions();
        options.setSchemaInfoLevel(SchemaInfoLevel.standard());

        final Catalog catalog = SchemaCrawlerUtility.getCatalog(connection, options);

        for (final Schema schema : catalog.getSchemas()) {
            System.out.println(schema);
            for (final Table table : catalog.getTables(schema)) {
                System.out.println("o--> " + table + " pk " + table.getPrimaryKey() + " fks " + table.getForeignKeys() + " type " + table.getTableType());
                for (final Column column : table.getColumns()) {
                    System.out.println("     o--> " + column + " pk: " + column.isPartOfPrimaryKey() + " fk: " + column.isPartOfForeignKey());
                }
            }
        }
    }
 

@Override
public String getSchemaName(Schema schema) {
    return schema.getName();
}
 

@Override
public String getSubschemaName(Schema schema) {
    return null;
}
 

public DaSchemaImpl(Schema schema, SchemaStrategy schemaStrategy) {
    this.schema = Validate.notNull(schema);
    this.schemaStrategy = schemaStrategy;
}
 

@Override
public String getSchemaName(Schema schema) {
    return schema.getCatalogName();
}
 

@Override
public String getSubschemaName(Schema schema) {
    return schema.getName();
}
 

/**
 * process the foreign key relations and constraints.
 */
private void secondPass(Catalog catalog) {
    for (Schema schema: catalog.getSchemas()) {
        LOG.debug(schema.toString());
        for (Table table: catalog.getTables(schema)) {
            for (ForeignKey fk: table.getForeignKeys()) {
                for (ForeignKeyColumnReference fkRef: fk.getColumnReferences()) {
                    Column fkCol = fkRef.getForeignKeyColumn();
                    Column pkCol = fkRef.getPrimaryKeyColumn();
                    Table pkTable = pkCol.getParent();

                    EntitySpec pkEspec = entitySpecs.get(pkTable);
                    EntitySpec fkEspec = entitySpecs.get(fkCol.getParent());
                    NodeSpec fkNSpec = nodeSpecs.get(fkCol);
                    if (pkEspec == null || fkEspec == null || fkNSpec == null) {
                      continue;
                    }

                    if (!processedFks.add(new ProcessedFk(fkNSpec, pkEspec))) {
                        continue;
                    }

                    /*
                     *  Do the N:1 natuarl foreign key relation *
                     */
                    fkNSpec.setName( genRealtionNodeName(fkNSpec) );
                    //java type is null, as the relation defines the type.
                    fkNSpec.setJavaType(null);
                    RelationSpec rspec = new RelationSpec();
                    rspec.setEntitySpec(pkEspec);
                    rspec.setJoinType(JoinTypeSpec.LEFT_OUTER_JOIN);
                    rspec.setType(RelationType.REFERS);
                    fkNSpec.setRelation(rspec);

                    LOG.debug("Added FK relation from {}.{} to {}", fkEspec.getClassName(), fkNSpec.getName(), pkEspec.getClassName());

                    createForeignKeyConstraint(fkEspec, fkNSpec, rspec);

                    /*
                     * do the opposite 1:N relation
                     */
                    //create the nodespec as there is no dbcolumn whch created a node for us
                    LOG.debug("Creating tomany node for N relation from {} to {}", pkEspec.getClassName(), fkEspec.getClassName());
                    NodeSpec toManyNodeSpec = new NodeSpec();
                    String nodeName = genRealtionNodeName(fkEspec, true);
                    while (pkEspec.getNodeSpec(nodeName) != null) {
                        nodeName = incrementNodeName(nodeName);
                    }
                    toManyNodeSpec.setName( nodeName );
                    toManyNodeSpec.setEntity(pkEspec);

                    rspec = new RelationSpec();
                    rspec.setBackReference(fkNSpec);
                    rspec.setEntitySpec(fkEspec);
                    rspec.setJoinType(JoinTypeSpec.LEFT_OUTER_JOIN);
                    rspec.setType(RelationType.REFERS);
                    toManyNodeSpec.setRelation(rspec);
                    pkEspec.add(toManyNodeSpec);
                }
            }
        }
    }
}
 

String getSchemaName(Schema schema); 

String getSubschemaName(Schema schema);