net.sf.mmm.util.lang.base
Class SpaceNormalizingCharIterator

java.lang.Object
  net.sf.mmm.util.lang.base.SpaceNormalizingCharIterator

All Implemented Interfaces:

CharIterator

public class SpaceNormalizingCharIterator
extends Object
implements CharIterator

This is an implementation of the CharIterator interface that adapts a CharIterator such that spaces are normalized.

Since:

1.0.2

Author:

Joerg Hohwiller (hohwille at users.sourceforge.net)

Field Summary

private CharIterator	delegate The underlying CharIterator to delegate to.
private boolean	nextCalled true if next() has already been called, initially false.
private char	nextNonSpace A buffer for the next non-space char if lookahead went to far, or ' ' if no char is buffered.
private CharFilter	spaceFilter SpaceNormalizingCharIterator(CharIterator, CharFilter, boolean)
private boolean	trim SpaceNormalizingCharIterator(CharIterator, CharFilter, boolean)

Fields inherited from interface net.sf.mmm.util.lang.api.CharIterator

END_OF_ITERATOR

Constructor Summary

SpaceNormalizingCharIterator(CharIterator delegate)
The constructor.

SpaceNormalizingCharIterator(CharIterator delegate, CharFilter spaceFilter, boolean trim)
The constructor.

Method Summary

boolean	hasNext() This method determines whether there is a next char available or the end of this iterator has been reached.
char	next() This method returns the next character to iterate or CharIterator.END_OF_ITERATOR if the end of this iterator has been reached.

Methods inherited from class java.lang.Object

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

Field Detail

delegate

private final CharIterator delegate

The underlying CharIterator to delegate to.

spaceFilter

private final CharFilter spaceFilter

SpaceNormalizingCharIterator(CharIterator, CharFilter, boolean)

trim

private final boolean trim

SpaceNormalizingCharIterator(CharIterator, CharFilter, boolean)

nextCalled

private boolean nextCalled

true if next() has already been called, initially false.

nextNonSpace

private char nextNonSpace

A buffer for the next non-space char if lookahead went to far, or ' ' if no char is buffered.

Constructor Detail

SpaceNormalizingCharIterator

public SpaceNormalizingCharIterator(CharIterator delegate)

The constructor.

Parameters:

delegate - is the CharIterator to adapt.

SpaceNormalizingCharIterator

public SpaceNormalizingCharIterator(CharIterator delegate,
                                    CharFilter spaceFilter,
                                    boolean trim)

The constructor.

Parameters:

delegate - is the CharIterator to adapt.

spaceFilter - is the CharFilter that defines what is accepted as space. It needs to accept at least ' '.

trim - - if true leading and trailing spaces are entirely consumed.

Method Detail

hasNext

public boolean hasNext()

This method determines whether there is a next char available or the end of this iterator has been reached.

Specified by:

hasNext in interface CharIterator

Returns:

true if there is at least one next char available, or false if the end of this iterator has been reached and further calls of CharIterator.next() will return CharIterator.END_OF_ITERATOR.

See Also:

CharIterator.next(), Iterator.hasNext()

next

public char next()

This method returns the next character to iterate or CharIterator.END_OF_ITERATOR if the end of this iterator has been reached. If CharIterator.END_OF_ITERATOR is returned further calls will always return CharIterator.END_OF_ITERATOR.

Specified by:

next in interface CharIterator

Returns:

the next character or CharIterator.END_OF_ITERATOR if the end of this iterator has been reached.

See Also:

Iterator.next()