IDataTableSchema

```
public interface IDataTableSchema
```
Describes the structure of a dataTable.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getColumnCount()`	Returns the number of columns a row contains.
`int`	`getColumnIndex(java.lang.String columnName)`	Returns the index of a columnName.
`IDataColumnSchema`	`getColumnSchema(int columnIndex)`	Returns the schema of the column with the specified index.
`IDataColumnSchema`	`getColumnSchema(java.lang.String columnName)`	Returns the schema of the column with the specified name.
`java.util.List<? extends IDataColumnSchema>`	`getColumnSchemas()`	Returns the schemas of all columns.
`boolean`	`hasColumn(java.lang.String columnName)`	Returns whether the column name is defined in the schema or not.

- Method Detail
  - hasColumn
```
boolean hasColumn(java.lang.String columnName)
```
    Returns whether the column name is defined in the schema or not.
    
    Parameters:
    
    columnName - the name of the column
    
    Returns:
    
    true if and only if the column name is defined in the schema
  - getColumnCount
```
int getColumnCount()
```
    Returns the number of columns a row contains.
    
    Returns:
    
    the number of columns a row contains
  - getColumnIndex
```
int getColumnIndex(java.lang.String columnName)
```
    Returns the index of a columnName.
    
    Parameters:
    
    columnName - the name of the column
    
    Returns:
    
    the index of a columnName
  - getColumnSchema
```
IDataColumnSchema getColumnSchema(int columnIndex)
```
    Returns the schema of the column with the specified index.
    
    Parameters:
    
    columnIndex - the index of the column
    
    Returns:
    
    the schema of the column
  - getColumnSchema
```
IDataColumnSchema getColumnSchema(java.lang.String columnName)
```
    Returns the schema of the column with the specified name.
    
    Parameters:
    
    columnName - the name the column
    
    Returns:
    
    the schema of the column
  - getColumnSchemas
```
java.util.List<? extends IDataColumnSchema> getColumnSchemas()
```
    Returns the schemas of all columns.
    
    Returns:
    
    the schemas of all columns