public class FilteredStrings extends AbstractList<String>
WildcardFilter.
This class is especially useful for collecting files from directories like below. It also takes care to handle null files
list that File.list() can return on exceptional conditions.
File directory = new File(".");
FilteredStrings sources = new FilteredStrings("*.java");
sources.addAll(directory.list());
for (String source : sources) {
// do something with java source
}
| Modifier and Type | Field and Description |
|---|---|
private WildcardFilter |
filter
Wildcard filter used to match pattern and given string.
|
private List<String> |
list
List used to collect strings.
|
modCount| Constructor and Description |
|---|
FilteredStrings(String pattern)
Construct a new filtered strings instance.
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(String string)
Add a string if it matches this filter pattern.
|
void |
addAll(String[] strings)
Add strings accepted by this filter predicate.
|
void |
addAll(String prefix,
String[] strings)
Add strings accepted by this filter pattern but prefixed with given string.
|
String |
get(int index)
Random, indexed access to a string from this strings list.
|
Iterator<String> |
iterator()
Returns an iterator instance usable to traverse this strings list.
|
int |
size()
Get the size of this strings list.
|
add, addAll, clear, equals, hashCode, indexOf, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subListaddAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toStringclone, finalize, getClass, notify, notifyAll, wait, wait, waitaddAll, contains, containsAll, isEmpty, remove, removeAll, replaceAll, retainAll, sort, spliterator, toArray, toArrayparallelStream, removeIf, streamprivate WildcardFilter filter
public FilteredStrings(String pattern)
WildcardFilter.pattern - string pattern.public boolean add(String string)
add in interface Collection<String>add in interface List<String>add in class AbstractList<String>string - string to add to this strings list.string argument matches the pattern and was added to this strings list.public void addAll(String prefix, String[] strings)
File.list() and can be null in which case this method does nothing. This method accept a prefix argument; it is
inserted at every string start before actually adding to strings list.
File directory = new File(".");
FilteredStrings files = new FilteredStrings("index.*");
files.addAll("/var/www/", directory.list());
If directory contains files like index.htm, index.css, etc. will be added to
files but prefixed like /var/www/index.htm, respective /var/www/index.css.prefix - prefix to insert on every string,strings - strings to scan for pattern, possible null.public void addAll(String[] strings)
File.list() and can be null in
which case this method does nothing.strings - strings to scan for pattern, possible null.public Iterator<String> iterator()
public int size()
size in interface Collection<String>size in interface List<String>size in class AbstractCollection<String>public String get(int index) throws IndexOutOfBoundsException
get in interface List<String>get in class AbstractList<String>index.IndexOutOfBoundsException - if the index is out of range.Copyright © 2019. All rights reserved.