Index4 (JSimpleDB Utility Classes 2.1.7 API)

Type Parameters:
V1 - first indexed value type
V2 - second indexed value type
V3 - third indexed value type
V4 - fourth indexed value type
T - index target type
```
public interface Index4<V1,V2,V3,V4,T>
```
An index on a four fields.
Indexes are read-only and "live", always reflecting the current transaction state.

See Also:
org.jsimpledb.index

Method Summary

Methods
Modifier and Type	Method and Description
`Index<V1,V2>`	`asIndex()` Get the prefix of this instance that only includes the first two indexed fields.
`Index2<V1,V2,V3>`	`asIndex2()` Get the prefix of this instance that only includes the first three indexed fields.
`Index3<V1,V2,V3,V4>`	`asIndex3()` Get the prefix of this instance that only includes the first four indexed fields.
`NavigableMap<Tuple4<V1,V2,V3,V4>,NavigableSet<T>>`	`asMap()` View this index as a `NavigableMap` of target values keyed by indexed value tuples.
`NavigableMap<Tuple3<V1,V2,V3>,Index<V4,T>>`	`asMapOfIndex()` View this index as a `NavigableMap` of `Index`s keyed by the first three values.
`NavigableMap<Tuple2<V1,V2>,Index2<V3,V4,T>>`	`asMapOfIndex2()` View this index as a `NavigableMap` of `Index2`s keyed by the first two values.
`NavigableMap<V1,Index3<V2,V3,V4,T>>`	`asMapOfIndex3()` View this index as a `NavigableMap` of `Index3`s keyed by the first value.
`NavigableSet<Tuple5<V1,V2,V3,V4,T>>`	`asSet()` View this index as a `NavigableSet` of tuples.

- Method Detail
  - asSet
```
NavigableSet<Tuple5<V1,V2,V3,V4,T>> asSet()
```
    View this index as a NavigableSet of tuples.
    
    Returns:
    NavigableSet of tuples containing indexed values and target value
  - asMap
```
NavigableMap<Tuple4<V1,V2,V3,V4>,NavigableSet<T>> asMap()
```
    View this index as a NavigableMap of target values keyed by indexed value tuples.
    
    Returns:
    NavigableMap from indexed value tuple to the corresponding set of target objects
  - asMapOfIndex
```
NavigableMap<Tuple3<V1,V2,V3>,Index<V4,T>> asMapOfIndex()
```
    View this index as a NavigableMap of Indexs keyed by the first three values.
    
    Returns:
    NavigableMap from first three values to Index
  - asMapOfIndex2
```
NavigableMap<Tuple2<V1,V2>,Index2<V3,V4,T>> asMapOfIndex2()
```
    View this index as a NavigableMap of Index2s keyed by the first two values.
    
    Returns:
    NavigableMap from first two values to Index2
  - asMapOfIndex3
```
NavigableMap<V1,Index3<V2,V3,V4,T>> asMapOfIndex3()
```
    View this index as a NavigableMap of Index3s keyed by the first value.
    
    Returns:
    NavigableMap from first value to Index3
  - asIndex3
```
Index3<V1,V2,V3,V4> asIndex3()
```
    Get the prefix of this instance that only includes the first four indexed fields.
    
    Returns:
    prefix of this index
  - asIndex2
```
Index2<V1,V2,V3> asIndex2()
```
    Get the prefix of this instance that only includes the first three indexed fields.
    
    Returns:
    prefix of this index
  - asIndex
```
Index<V1,V2> asIndex()
```
    Get the prefix of this instance that only includes the first two indexed fields.
    
    Returns:
    prefix of this index

Interface Index4<V1,V2,V3,V4,T>

Method Summary

Method Detail

asSet

asMap

asMapOfIndex

asMapOfIndex2

asMapOfIndex3

asIndex3

asIndex2

asIndex