Expandable (Marvin API documentation (c) 1998-2021 ChemAxon Ltd.)

All Known Implementing Classes:

MultipleSgroup, SuperatomSgroup
```
@PublicAPI
public interface Expandable
```
Expandable interface for S-groups.

Since:

Marvin 3.0, 11/05/2002

Version:

4.1, 01/12/2006

Author:

Peter Csizmadia

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`COORDS_UPDATE` Deprecated. As of Marvin 6.2, no replacement. Not supported feature.
`static int`	`DEFAULT_OPTIONS` Default expansion/contraction options.
`static int`	`FAST_COORDS` Fast coordinate calculation in expand.
`static int`	`LEAVE_COORDS_UNCHANGED` Coordinates are not calculated during expand or contract.
`static int`	`MDL_EXPAND` MDL like multiple group expansion flag.
`static int`	`NONRECURSIVE_EXPAND` Non recursive expansion of child groups.
`static int`	`REVERSIBLE_EXPAND` Deprecated. as of Marvin 6.2, use `LEAVE_COORDS_UNCHANGED` instead

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`boolean`	`contract(int opts)` Contracts the S-group.
`boolean`	`expand(int opts)` Expands the S-group.
`boolean`	`isExpanded()` Is this S-group expanded?

- Field Detail
  - DEFAULT_OPTIONS
```
static final int DEFAULT_OPTIONS
```
    Default expansion/contraction options.
    
    Since:
    
    Marvin 3.3
    
    See Also:
    
    Constant Field Values
  - MDL_EXPAND
```
static final int MDL_EXPAND
```
    MDL like multiple group expansion flag. Coordinates of corresponding atoms in different expanded units are equal. Use this flag for MDL molfile export.
    
    See Also:
    
    Constant Field Values
  - REVERSIBLE_EXPAND
```
@Deprecated
static final int REVERSIBLE_EXPAND
```
    Deprecated. as of Marvin 6.2, use LEAVE_COORDS_UNCHANGED instead
    
    Reversible expansion or contraction. Coordinates are not calculated.
    
    Since:
    
    Marvin 3.4, 03/18/2004
    
    See Also:
    
    Constant Field Values
  - LEAVE_COORDS_UNCHANGED
```
static final int LEAVE_COORDS_UNCHANGED
```
    Coordinates are not calculated during expand or contract.
    
    Since:
    
    Marvin 6.2, 2013/09/25
    
    See Also:
    
    Constant Field Values
  - NONRECURSIVE_EXPAND
```
static final int NONRECURSIVE_EXPAND
```
    Non recursive expansion of child groups.
    
    Since:
    
    Marvin 3.4, 04/22/2004
    
    See Also:
    
    Constant Field Values
  - FAST_COORDS
```
static final int FAST_COORDS
```
    Fast coordinate calculation in expand.
    
    Since:
    
    Marvin 4.1, 01/12/2006
    
    See Also:
    
    Constant Field Values
  - COORDS_UPDATE
```
@Deprecated
static final int COORDS_UPDATE
```
    Deprecated. As of Marvin 6.2, no replacement.
    Not supported feature.
    
    Performs coordinate update during the unbinding of atoms. The atom which replaces the unbound atom will take the coordinates of the unbound atom in order preserve the stereo attributes of crossing bonds.
    
    Since:
    
    Marvin 5.3, 01/27/2010
    
    See Also:
    
    Constant Field Values
- Method Detail
  - contract
```
boolean contract(int opts)
```
    Contracts the S-group.
    
    Parameters:
    
    opts - contraction options
    
    Returns:
    
    true if the operation was successful, false if the group cannot be contracted
    
    See Also:
    
    DEFAULT_OPTIONS, LEAVE_COORDS_UNCHANGED
  - expand
```
boolean expand(int opts)
```
    Expands the S-group.
    
    Parameters:
    
    opts - expansion options
    
    Returns:
    
    true if the operation was successful, false if the group cannot be expanded
    
    See Also:
    
    DEFAULT_OPTIONS, MDL_EXPAND, LEAVE_COORDS_UNCHANGED
  - isExpanded
```
boolean isExpanded()
```
    Is this S-group expanded?
    
    Returns:
    
    true if expanded, false if not

Interface Expandable

Field Summary

Method Summary

Field Detail

DEFAULT_OPTIONS

MDL_EXPAND

REVERSIBLE_EXPAND

LEAVE_COORDS_UNCHANGED

NONRECURSIVE_EXPAND

FAST_COORDS

COORDS_UPDATE

Method Detail

contract

expand

isExpanded