StringPool (YABR)

tonic@yabr:~$ Source Portfolio tonicbox.dev

java.lang.Object
- com.tonic.analysis.execution.heap.StringPool

```
public class StringPool
extends Object
```
Interning pool that materializes java/lang/String heap objects in char-array or compact byte-array layout.

Constructor Summary

Constructors
Constructor Description

StringPool(AtomicInteger nextId)
Creates an empty pool.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Removes all pooled strings.
`ObjectInstance`	`intern(String value)`	Returns the pooled string object for a value, creating it on first use.
`boolean`	`isInterned(String value)`	Checks whether a value already has a pooled object.
`boolean`	`isUsingCompactStrings()`
`void`	`setUseCompactStrings(boolean compact)`	Selects the layout used for newly created string objects.
`int`	`size()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - StringPool
```
public StringPool(AtomicInteger nextId)
```
    Creates an empty pool.
    
    Parameters:
    
    nextId - shared heap id counter used for created objects
- Method Detail
  - setUseCompactStrings
```
public void setUseCompactStrings(boolean compact)
```
    Selects the layout used for newly created string objects.
    
    Parameters:
    
    compact - true for the Java 9+ byte-array layout, false for char-array
  - isUsingCompactStrings
```
public boolean isUsingCompactStrings()
```
    Returns:
    
    whether new strings use the compact byte-array layout
  - intern
```
public ObjectInstance intern(String value)
```
    Returns the pooled string object for a value, creating it on first use.
    
    Parameters:
    
    value - the string to intern
    
    Returns:
    
    the canonical heap object for the value
  - isInterned
```
public boolean isInterned(String value)
```
    Checks whether a value already has a pooled object.
    
    Parameters:
    
    value - the string to test
    
    Returns:
    
    true if the value is in the pool
  - size
```
public int size()
```
    Returns:
    
    the number of interned strings
  - clear
```
public void clear()
```
    Removes all pooled strings.