ColumnResolver

All Known Implementing Classes:

SelectListColumnResolver, SingleColumnResolver, TableFilter
```
public interface ColumnResolver
```
A column resolver is list of column (for example, a table) that can map a column name to an actual column.

Method Summary

Methods
Modifier and Type	Method and Description
`Column`	`findColumn(java.lang.String name)` Get the column with the specified name.
`java.lang.String`	`getColumnName(Column column)` Get the name of the specified column.
`Column[]`	`getColumns()` Get the column list.
`Column`	`getRowIdColumn()` Get the row id pseudo column, if there is one.
`java.lang.String`	`getSchemaName()` Get the schema name or null.
`Select`	`getSelect()` Get the select statement.
`Column[]`	`getSystemColumns()` Get the list of system columns, if any.
`java.lang.String`	`getTableAlias()` Get the table alias.
`TableFilter`	`getTableFilter()` Get the table filter.
`Value`	`getValue(Column column)` Get the value for the given column.
`boolean`	`hasDerivedColumnList()` Returns whether this column resolver has a derived column list.
`Expression`	`optimize(ExpressionColumn expressionColumn, Column column)` Get the expression that represents this column.

- Method Detail
  - getTableAlias
```
java.lang.String getTableAlias()
```
    Get the table alias.
    
    Returns:
    the table alias
  - getColumns
```
Column[] getColumns()
```
    Get the column list.
    
    Returns:
    the column list
  - findColumn
```
Column findColumn(java.lang.String name)
```
    Get the column with the specified name.
    
    Parameters:
    name - the column name, must be a derived name if this column resolver has a derived column list
    
    Returns:
    the column with the specified name, or null
  - getColumnName
```
java.lang.String getColumnName(Column column)
```
    Get the name of the specified column.
    
    Parameters:
    column - column
    
    Returns:
    column name
  - hasDerivedColumnList
```
boolean hasDerivedColumnList()
```
    Returns whether this column resolver has a derived column list.
    
    Returns:
    true if this column resolver has a derived column list, false otherwise
  - getSystemColumns
```
Column[] getSystemColumns()
```
    Get the list of system columns, if any.
    
    Returns:
    the system columns or null
  - getRowIdColumn
```
Column getRowIdColumn()
```
    Get the row id pseudo column, if there is one.
    
    Returns:
    the row id column or null
  - getSchemaName
```
java.lang.String getSchemaName()
```
    Get the schema name or null.
    
    Returns:
    the schema name or null
  - getValue
```
Value getValue(Column column)
```
    Get the value for the given column.
    
    Parameters:
    column - the column
    
    Returns:
    the value
  - getTableFilter
```
TableFilter getTableFilter()
```
    Get the table filter.
    
    Returns:
    the table filter
  - getSelect
```
Select getSelect()
```
    Get the select statement.
    
    Returns:
    the select statement
  - optimize
```
Expression optimize(ExpressionColumn expressionColumn,
                  Column column)
```
    Get the expression that represents this column.
    
    Parameters:
    expressionColumn - the expression column
    column - the column
    
    Returns:
    the optimized expression

Interface ColumnResolver

Method Summary

Method Detail

getTableAlias

getColumns

findColumn

getColumnName

hasDerivedColumnList

getSystemColumns

getRowIdColumn

getSchemaName

getValue

getTableFilter

getSelect

optimize