java.sql.ResultSetMetaData#columnNullableUnknown ( )源码实例Demo

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

public int isNullable(int column)
{
  if (nullables != null)
  {
    return nullables.get(column - 1);
  }
  else
  {
    return ResultSetMetaData.columnNullableUnknown;
  }
}
 

@DataProvider(name = "validSetNullableValues")
private Object[][] validSetNullableValues() {
    return new Object[][]{
        {ResultSetMetaData.columnNoNulls},
        {ResultSetMetaData.columnNullable},
        {ResultSetMetaData.columnNullableUnknown}
    };
}
 

public int isNullable(int column) throws SQLException {
    return ResultSetMetaData.columnNullableUnknown;
}
 

@Override
public int isNullable(int column) throws SQLException {
    return ResultSetMetaData.columnNullableUnknown;
}
 

private Builder withNullableUnknown() {
  this.nulls = ResultSetMetaData.columnNullableUnknown;
  return this;
}
 

@Override
public int isNullable(int column) throws SQLException {
    return ResultSetMetaData.columnNullableUnknown;
}
 

/**
 * Process a TDS 4.2 column format token.
 *
 * @throws IOException
 * @throws ProtocolException
 */
private void tds4ColFormatToken()
    throws IOException, ProtocolException {

    final int pktLen = in.readShort();

    int bytesRead = 0;
    int numColumns = 0;
    while (bytesRead < pktLen) {
        if (numColumns > columns.length) {
            throw new ProtocolException("Too many columns in TDS_COL_FMT packet");
        }
        ColInfo col = columns[numColumns];

        if (serverType == Driver.SQLSERVER) {
            col.userType = in.readShort();

            int flags = in.readShort();

            col.nullable = ((flags & 0x01) != 0)?
                                ResultSetMetaData.columnNullable:
                                   ResultSetMetaData.columnNoNulls;
            col.isCaseSensitive = (flags & 0x02) != 0;
            col.isWriteable = (flags & 0x0C) != 0;
            col.isIdentity = (flags & 0x10) != 0;
        } else {
            // Sybase does not send column flags
            col.isCaseSensitive = false;
            col.isWriteable = true;

            if (col.nullable == ResultSetMetaData.columnNoNulls) {
                col.nullable = ResultSetMetaData.columnNullableUnknown;
            }

            col.userType = in.readInt();
        }
        bytesRead += 4;

        bytesRead += TdsData.readType(in, col);

        numColumns++;
    }

    if (numColumns != columns.length) {
        throw new ProtocolException("Too few columns in TDS_COL_FMT packet");
    }

    endOfResults = false;
}
 

/**
 * @see java.sql.ResultSetMetaData#isNullable(int)
 */
@Override public int isNullable(int column) {
    logStep("isNullable", column);
    return ResultSetMetaData.columnNullableUnknown; // TODO Check if somes settings exists for that in field descriptor.
}