org.mozilla.javascript
Class ConsString

java.lang.Object
  org.mozilla.javascript.ConsString

All Implemented Interfaces:

java.io.Serializable, java.lang.CharSequence

public class ConsString
extends java.lang.Object
implements java.lang.CharSequence, java.io.Serializable

This class represents a string composed of two components, each of which may be a java.lang.String or another ConsString.

This string representation is optimized for concatenation using the "+" operator. Instead of immediately copying both components to a new character array, ConsString keeps references to the original components and only converts them to a String if either toString() is called or a certain depth level is reached.

Note that instances of this class are only immutable if both parts are immutable, i.e. either Strings or ConsStrings that are ultimately composed of Strings.

Both the name and the concept are borrowed from V8.

See Also:

Serialized Form

Constructor Summary

ConsString(java.lang.CharSequence str1, java.lang.CharSequence str2)

Method Summary

char	charAt(int index)
int	length()
java.lang.CharSequence	subSequence(int start, int end)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConsString

public ConsString(java.lang.CharSequence str1,
                  java.lang.CharSequence str2)

Method Detail

toString

public java.lang.String toString()

Specified by:

toString in interface java.lang.CharSequence

Overrides:

toString in class java.lang.Object

length

public int length()

Specified by:

length in interface java.lang.CharSequence

charAt

public char charAt(int index)

Specified by:

charAt in interface java.lang.CharSequence

subSequence

public java.lang.CharSequence subSequence(int start,
                                          int end)

Specified by:

subSequence in interface java.lang.CharSequence