public
class
ItemIdComposer
extends Object| java.lang.Object | |
| ↳ | com.h6ah4i.android.widget.advrecyclerview.adapter.ItemIdComposer |
Class Overview
Utility class providing "Composed item ID" related definitions and methods.
Spec:
| bit 63 | Reserved |
|---|---|
| bit 62-56 | View type segment |
| bit 55-28 | Group ID |
| bit 27-0 | Child ID |
Summary
| Constants | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| long | BIT_MASK_CHILD_ID | Bit mask of the expandable child ID part. | |||||||||
| long | BIT_MASK_GROUP_ID | Bit mask of the expandable group ID part. | |||||||||
| long | BIT_MASK_RESERVED_SIGN_FLAG | Bit mask of the reserved sign flag part. | |||||||||
| long | BIT_MASK_SEGMENT | Bit mask of the segment part. | |||||||||
| int | BIT_OFFSET_CHILD_ID | Bit offset of the child ID part. | |||||||||
| int | BIT_OFFSET_GROUP_ID | Bit offset of the group ID part. | |||||||||
| int | BIT_OFFSET_RESERVED_SIGN_FLAG | Bit offset of the reserved sign flag part. | |||||||||
| int | BIT_OFFSET_SEGMENT | Bit offset of the segment part. | |||||||||
| int | BIT_WIDTH_CHILD_ID | Bit width of the expandable child ID part. | |||||||||
| int | BIT_WIDTH_GROUP_ID | Bit width of the expandable group ID part. | |||||||||
| int | BIT_WIDTH_RESERVED_SIGN_FLAG | Bit width of the reserved sign flag part. | |||||||||
| int | BIT_WIDTH_SEGMENT | Bit width of the segment part. | |||||||||
| long | MAX_CHILD_ID | Maximum value of child ID. | |||||||||
| long | MAX_GROUP_ID | Maximum value of group ID. | |||||||||
| int | MAX_SEGMENT | Maximum value of segment. | |||||||||
| long | MAX_WRAPPED_ID | Minimum value of wrapped ID (= group + child) ID. | |||||||||
| long | MIN_CHILD_ID | Minimum value of child ID. | |||||||||
| long | MIN_GROUP_ID | Minimum value of group ID. | |||||||||
| int | MIN_SEGMENT | Minimum value of segment. | |||||||||
| long | MIN_WRAPPED_ID | Minimum value of wrapped ID (= group + child) ID. | |||||||||
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| static long |
composeExpandableChildId(long groupId, long childId)
Makes a composed ID which represents a child item of an expandable group.
| ||||||||||
| static long |
composeExpandableGroupId(long groupId)
Makes a composed ID which represents an expandable group item.
| ||||||||||
| static long |
composeSegment(int segment, long wrappedId)
Makes a composed ID with specified segment and wrapped ID.
| ||||||||||
| static long |
extractExpandableChildIdPart(long composedId)
Extracts "Child ID" part from composed ID.
| ||||||||||
| static long |
extractExpandableGroupIdPart(long composedId)
Extracts "Group ID" part from composed ID.
| ||||||||||
| static int |
extractSegmentPart(long composedId)
Extracts "Segment" part from composed ID.
| ||||||||||
| static long |
extractWrappedIdPart(long composedId)
Extracts "Wrapped ID" (group ID + child ID) part from composed ID.
| ||||||||||
| static boolean |
isExpandableGroup(long composedId)
Checks the composed ID is a expandable group or not.
| ||||||||||
|
[Expand]
Inherited Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
From class
java.lang.Object
| |||||||||||
Constants
public static final long BIT_MASK_CHILD_ID
Bit mask of the expandable child ID part.
Constant Value:
268435455
(0x000000000fffffff)
public static final long BIT_MASK_GROUP_ID
Bit mask of the expandable group ID part.
Constant Value:
72057593769492480
(0x00fffffff0000000)
public static final long BIT_MASK_RESERVED_SIGN_FLAG
Bit mask of the reserved sign flag part.
Constant Value:
-9223372036854775808
(0x8000000000000000)
public static final long BIT_MASK_SEGMENT
Bit mask of the segment part.
Constant Value:
9151314442816847872
(0x7f00000000000000)
public static final int BIT_OFFSET_CHILD_ID
Bit offset of the child ID part.
Constant Value:
0
(0x00000000)
public static final int BIT_OFFSET_GROUP_ID
Bit offset of the group ID part.
Constant Value:
28
(0x0000001c)
public static final int BIT_OFFSET_RESERVED_SIGN_FLAG
Bit offset of the reserved sign flag part.
Constant Value:
63
(0x0000003f)
public static final int BIT_OFFSET_SEGMENT
Bit offset of the segment part.
Constant Value:
56
(0x00000038)
public static final int BIT_WIDTH_CHILD_ID
Bit width of the expandable child ID part.
Constant Value:
28
(0x0000001c)
public static final int BIT_WIDTH_GROUP_ID
Bit width of the expandable group ID part.
Constant Value:
28
(0x0000001c)
public static final int BIT_WIDTH_RESERVED_SIGN_FLAG
Bit width of the reserved sign flag part.
Constant Value:
1
(0x00000001)
public static final int BIT_WIDTH_SEGMENT
Bit width of the segment part.
Constant Value:
7
(0x00000007)
public static final long MAX_CHILD_ID
Maximum value of child ID.
Constant Value:
134217727
(0x0000000007ffffff)
public static final long MAX_GROUP_ID
Maximum value of group ID.
Constant Value:
134217727
(0x0000000007ffffff)
public static final int MAX_SEGMENT
Maximum value of segment.
Constant Value:
127
(0x0000007f)
public static final long MAX_WRAPPED_ID
Minimum value of wrapped ID (= group + child) ID.
Constant Value:
36028797018963967
(0x007fffffffffffff)
public static final long MIN_CHILD_ID
Minimum value of child ID.
Constant Value:
-134217728
(0xfffffffff8000000)
public static final long MIN_GROUP_ID
Minimum value of group ID.
Constant Value:
-134217728
(0xfffffffff8000000)
public static final int MIN_SEGMENT
Minimum value of segment.
Constant Value:
0
(0x00000000)
public static final long MIN_WRAPPED_ID
Minimum value of wrapped ID (= group + child) ID.
Constant Value:
-36028797018963968
(0xff80000000000000)
Public Methods
public static long composeExpandableChildId (long groupId, long childId)
Makes a composed ID which represents a child item of an expandable group.
Parameters
| groupId | Group item ID |
|---|---|
| childId | Child item ID |
Returns
- Composed expandable child ID
public static long composeExpandableGroupId (long groupId)
Makes a composed ID which represents an expandable group item.
Parameters
| groupId | Group item ID |
|---|
Returns
- Composed expandable group ID
public static long composeSegment (int segment, long wrappedId)
Makes a composed ID with specified segment and wrapped ID.
Parameters
| segment | Segment |
|---|---|
| wrappedId | Wrapped ID |
Returns
- Composed ID.
public static long extractExpandableChildIdPart (long composedId)
Extracts "Child ID" part from composed ID.
Parameters
| composedId | Composed ID |
|---|
Returns
- Child ID part. If the specified composed ID is not a child of an expandable group, returns
NO_ID.
public static long extractExpandableGroupIdPart (long composedId)
Extracts "Group ID" part from composed ID.
Parameters
| composedId | Composed ID |
|---|
Returns
- Group ID part. If the specified composed ID is not an expandable group, returns
NO_ID.
public static int extractSegmentPart (long composedId)
Extracts "Segment" part from composed ID.
Parameters
| composedId | Composed ID |
|---|
Returns
- Segment part
public static long extractWrappedIdPart (long composedId)
Extracts "Wrapped ID" (group ID + child ID) part from composed ID.
Parameters
| composedId | Composed ID |
|---|
Returns
- Wrapped ID part.
public static boolean isExpandableGroup (long composedId)
Checks the composed ID is a expandable group or not.
Parameters
| composedId | Composed ID |
|---|
Returns
- True if the specified composed ID is an expandable group ID. Otherwise, false.