public Test() {
Context context = new Context();
context.execute();
context.setState(new FirstState());
context.execute();
context.execute();
context.execute();
context.execute();
}
public static void main(String[] args) {
Context context;
System.out.println("-----执行策略1------");
context = new Context(new ConcreteStrategy1());
context.execute();
System.out.println("----执行策略2---");
context = new Context(new ConcreteStrategy2());
context.execute();
}
@Override
public void execute(Context context) throws SQLException {
VarcharColumnDef propKey =
newVarcharColumnDefBuilder()
.setColumnName("prop_key")
.setLimit(512)
.setIsNullable(false)
.setIgnoreOracleUnit(true)
.build();
List<String> stmts =
new CreateTableBuilder(getDialect(), TABLE_NAME)
.addPkColumn(
newIntegerColumnDefBuilder().setColumnName("id").setIsNullable(false).build(),
AUTO_INCREMENT)
.addColumn(propKey)
.addColumn(
newBigIntegerColumnDefBuilder()
.setColumnName("resource_id")
.setIsNullable(true)
.build())
.addColumn(
newBigIntegerColumnDefBuilder()
.setColumnName("user_id")
.setIsNullable(true)
.build())
.addColumn(
newBooleanColumnDefBuilder().setColumnName("is_empty").setIsNullable(false).build())
.addColumn(
newVarcharColumnDefBuilder()
.setColumnName("text_value")
.setLimit(MAX_SIZE)
.setIgnoreOracleUnit(true)
.build())
.addColumn(
newClobColumnDefBuilder().setColumnName("clob_value").setIsNullable(true).build())
.addColumn(
newBigIntegerColumnDefBuilder()
.setColumnName("created_at")
.setIsNullable(false)
.build())
// table with be renamed to properties in following migration, use final constraint name
// right away
.withPkConstraintName("pk_properties")
.build();
context.execute(stmts);
context.execute(
new CreateIndexBuilder(getDialect())
.setTable(TABLE_NAME)
.setName("properties2_key")
.addColumn(propKey)
.build());
}
@Override
protected void perform(Context context) {
// Obtain the change
final Change<?> change = this.getChange(this.woofChanges, context);
if (change == null) {
return; // no change to perform
}
// Execute the change
context.execute(new ChangeCommand(change));
}
@Override
public void execute(Context context) throws SQLException {
context.execute(
new AlterColumnsBuilder(getDatabase().getDialect(), TABLE_ACTIVITIES)
.updateColumn(
newVarcharColumnDefBuilder()
.setColumnName("profile_key")
.setLimit(255)
.setIsNullable(false)
.setIgnoreOracleUnit(true)
.build())
.build());
}
public static void main(String args[]) {
Scanner userInput;
try {
userInput = new Scanner(System.in);
} catch (Exception e) {
userInput = null;
}
System.out.print("Please Enter Value: ");
inputChars = (userInput.nextLine() + '\0').toCharArray();
Context context = new Context();
for (int i = 0; i < inputChars.length; i++) {
context.execute(inputChars[i]);
}
System.out.println(context.getValue());
}
@Override
public void execute(Context context) throws SQLException {
context.execute(
new DropColumnsBuilder(getDatabase().getDialect(), TABLE, "snapshot_id").build());
}
@Override
public void execute(Context context) throws SQLException {
context.execute(generateSql());
}