Package com.dslplatform.json

Class DslJson.SimpleStringCache

java.lang.Object

com.dslplatform.json.DslJson.SimpleStringCache

All Implemented Interfaces:

StringCache

Enclosing class:

DslJson<TContext>

public static class DslJson.SimpleStringCache
extends Object
implements StringCache

Simplistic string cache implementation. It uses a fixed String[] structure in which it caches string value based on it's hash. Eg, hash & mask provide index into the structure. Different string with same hash will overwrite the previous one.

Field Summary

Fields

Modifier and Type	Field	Description
private final String[]	cache
private final int	mask

Constructor Summary

Constructors

Constructor	Description
SimpleStringCache()	Will use String[] with 1024 elements.
SimpleStringCache(int log2Size)

Method Summary

Modifier and Type	Method	Description
private String	createAndPut(int index, char[] chars, int len)
String	get(char[] chars, int len)	Calculates hash of the provided "string" and looks it up from the String[] It it doesn't exists of a different string is already there a new String instance is created and saved into the String[]

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

mask

private final int mask

cache

private final String[] cache

Constructor Details

SimpleStringCache

public SimpleStringCache()

Will use String[] with 1024 elements.

SimpleStringCache

public SimpleStringCache(int log2Size)

Method Details

get

public String get(char[] chars,
 int len)

Calculates hash of the provided "string" and looks it up from the String[] It it doesn't exists of a different string is already there a new String instance is created and saved into the String[]

Specified by:

get in interface StringCache

Parameters:

chars - buffer into which string was parsed

len - the string length inside the buffer

Returns:

String instance matching the char[]/int pair

createAndPut

private String createAndPut(int index,
 char[] chars,
 int len)