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org.txt2xml.core
Class SubCharSequence  

java.lang.Object
  org.txt2xml.core.SubCharSequence

All Implemented Interfaces:

java.lang.CharSequence

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public final class SubCharSequence

extends java.lang.Object

implements java.lang.CharSequence

For internal use. A CharSequence that represents a sub-sequence of some parent java.lang.CharSequence.

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Field Summary
private  int	length
private  int	offset
private  java.lang.CharSequence	parent

 

Constructor Summary

SubCharSequence(java.lang.CharSequence parent, int offset, int length)

 

Method Summary
char	charAt(int index)           Returns the character at the given index.
boolean	equals(java.lang.Object obj)           Determine whether this Object is semantically equal to another Object.
int	getOffset()
int	length()           Returns the length of the sequence.
java.lang.CharSequence	subSequence(int start, int end)           Returns a new CharSequence of the indicated range.
java.lang.String	toString()           Returns the complete CharSequence as a String.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

parent

private java.lang.CharSequence parent

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offset

private int offset

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length

private int length

Constructor Detail

SubCharSequence

public SubCharSequence(java.lang.CharSequence parent,
                       int offset,
                       int length)

Method Detail

getOffset

public int getOffset()

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length

public int length()

Description copied from interface: java.lang.CharSequence

Returns the length of the sequence. This is the number of 16-bit characters in the sequence, which may differ from the length of the underlying encoding.

Specified by:

length in interface java.lang.CharSequence

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charAt

public char charAt(int index)

Description copied from interface: java.lang.CharSequence

Returns the character at the given index.

Specified by:

charAt in interface java.lang.CharSequence

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subSequence

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

Description copied from interface: java.lang.CharSequence

Returns a new CharSequence of the indicated range.

Specified by:

subSequence in interface java.lang.CharSequence

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toString

public java.lang.String toString()

Description copied from interface: java.lang.CharSequence

Returns the complete CharSequence as a String. Classes that implement this interface should return a String which contains only the characters in the sequence in the correct order.

Specified by:

toString in interface java.lang.CharSequence

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equals

public boolean equals(java.lang.Object obj)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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