Complete javadoc.
git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1436822 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas Neidhart
parent
f3fff979ca
commit
38e3a7435f
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@ -123,6 +123,7 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>EmptyIterator.INSTANCE</code> for compatibility with Commons Collections 2.1.1.
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*
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* @param <E> the element type
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* @return an iterator over nothing
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*/
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public static <E> ResettableIterator<E> emptyIterator() {
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@ -138,6 +139,7 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>EmptyListIterator.INSTANCE</code> for compatibility with Commons Collections 2.1.1.
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*
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* @param <E> the element type
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* @return a list iterator over nothing
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*/
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public static <E> ResettableListIterator<E> emptyListIterator() {
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@ -150,6 +152,7 @@ public class IteratorUtils {
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* This iterator is a valid iterator object that will iterate
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* over nothing.
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*
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* @param <E> the element type
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* @return an ordered iterator over nothing
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*/
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public static <E> OrderedIterator<E> emptyOrderedIterator() {
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@ -162,6 +165,8 @@ public class IteratorUtils {
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* This iterator is a valid map iterator object that will iterate
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* over nothing.
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*
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* @param <K> the key type
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* @param <V> the value type
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* @return a map iterator over nothing
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*/
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public static <K, V> MapIterator<K, V> emptyMapIterator() {
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@ -174,6 +179,8 @@ public class IteratorUtils {
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* This iterator is a valid map iterator object that will iterate
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* over nothing.
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*
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* @param <K> the key type
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* @param <V> the value type
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* @return a map iterator over nothing
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*/
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public static <K, V> OrderedMapIterator<K, V> emptyOrderedMapIterator() {
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@ -191,6 +198,7 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>new SingletonIterator(object)</code> for compatibility.
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*
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* @param <E> the element type
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* @param object the single object over which to iterate
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* @return a singleton iterator over the object
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*/
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@ -204,6 +212,7 @@ public class IteratorUtils {
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* This iterator is a valid list iterator object that will iterate over
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* the specified object.
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*
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* @param <E> the element type
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* @param object the single object over which to iterate
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* @return a singleton list iterator over the object
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*/
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@ -219,6 +228,7 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>new ArrayIterator(array)</code> for compatibility.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @return an iterator over the array
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* @throws NullPointerException if array is null
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@ -233,6 +243,7 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @return an iterator over the array
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* @throws IllegalArgumentException if the array is not an array
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@ -248,11 +259,12 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>new ArrayIterator(array,start)</code> for compatibility.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @return an iterator over part of the array
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* @throws IndexOutOfBoundsException if start is less than zero or greater
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* than the length of the array
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* than the length of the array
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* @throws NullPointerException if array is null
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*/
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public static <E> ResettableIterator<E> arrayIterator(final E[] array, final int start) {
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@ -265,12 +277,13 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @return an iterator over part of the array
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* @throws IllegalArgumentException if the array is not an array
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* @throws IndexOutOfBoundsException if start is less than zero or greater
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* than the length of the array
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* than the length of the array
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* @throws NullPointerException if array is null
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*/
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public static <E> ResettableIterator<E> arrayIterator(final Object array, final int start) {
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@ -283,6 +296,7 @@ public class IteratorUtils {
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* WARNING: This method is binary incompatible with Commons Collections 2.1 and 2.1.1.
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* Use <code>new ArrayIterator(array,start,end)</code> for compatibility.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @param end the index to finish iterating at
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@ -301,13 +315,13 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @param end the index to finish iterating at
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* @return an iterator over part of the array
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* @throws IllegalArgumentException if the array is not an array
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* @throws IllegalArgumentException if the array is not an array or end is before start
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* @throws IndexOutOfBoundsException if array bounds are invalid
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* @throws IllegalArgumentException if end is before start
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* @throws NullPointerException if array is null
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*/
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public static <E> ResettableIterator<E> arrayIterator(final Object array, final int start, final int end) {
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@ -318,6 +332,7 @@ public class IteratorUtils {
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/**
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* Gets a list iterator over an object array.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @return a list iterator over the array
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* @throws NullPointerException if array is null
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@ -332,6 +347,7 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @return a list iterator over the array
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* @throws IllegalArgumentException if the array is not an array
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@ -344,6 +360,7 @@ public class IteratorUtils {
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/**
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* Gets a list iterator over the end part of an object array.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @return a list iterator over part of the array
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@ -360,6 +377,7 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @return a list iterator over part of the array
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@ -374,6 +392,7 @@ public class IteratorUtils {
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/**
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* Gets a list iterator over part of an object array.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @param end the index to finish iterating at
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@ -392,13 +411,13 @@ public class IteratorUtils {
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* This method will handle primitive arrays as well as object arrays.
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* The primitives will be wrapped in the appropriate wrapper class.
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*
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* @param <E> the element type
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* @param array the array over which to iterate
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* @param start the index to start iterating at
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* @param end the index to finish iterating at
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* @return a list iterator over part of the array
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* @throws IllegalArgumentException if the array is not an array
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* @throws IllegalArgumentException if the array is not an array or end is before start
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* @throws IndexOutOfBoundsException if array bounds are invalid
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* @throws IllegalArgumentException if end is before start
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* @throws NullPointerException if array is null
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*/
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public static <E> ResettableListIterator<E> arrayListIterator(final Object array, final int start, final int end) {
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@ -412,6 +431,7 @@ public class IteratorUtils {
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* will always throw an {@link UnsupportedOperationException} for
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* the {@link Iterator#remove} method.
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*
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* @param <E> the element type
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* @param iterator the iterator to make immutable
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* @return an immutable version of the iterator
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*/
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@ -425,6 +445,7 @@ public class IteratorUtils {
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* the {@link Iterator#remove}, {@link ListIterator#add} and
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* {@link ListIterator#set} methods.
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*
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* @param <E> the element type
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* @param listIterator the iterator to make immutable
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* @return an immutable version of the iterator
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*/
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@ -437,6 +458,8 @@ public class IteratorUtils {
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* will always throw an {@link UnsupportedOperationException} for
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* the {@link Iterator#remove}, {@link MapIterator#setValue(Object)} methods.
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*
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* @param <K> the key type
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* @param <V> the value type
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* @param mapIterator the iterator to make immutable
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* @return an immutable version of the iterator
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*/
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@ -450,8 +473,9 @@ public class IteratorUtils {
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* Gets an iterator that iterates through two {@link Iterator}s
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* one after another.
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*
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* @param iterator1 the first iterators to use, not null
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* @param iterator2 the first iterators to use, not null
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* @param <E> the element type
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* @param iterator1 the first iterator to use, not null
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* @param iterator2 the second iterator to use, not null
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* @return a combination iterator over the iterators
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* @throws NullPointerException if either iterator is null
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*/
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@ -464,6 +488,7 @@ public class IteratorUtils {
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* Gets an iterator that iterates through an array of {@link Iterator}s
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* one after another.
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*
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* @param <E> the element type
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* @param iterators the iterators to use, not null or empty or contain nulls
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* @return a combination iterator over the iterators
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* @throws NullPointerException if iterators array is null or contains a null
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@ -476,6 +501,7 @@ public class IteratorUtils {
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* Gets an iterator that iterates through a collections of {@link Iterator}s
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* one after another.
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*
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* @param <E> the element type
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* @param iterators the iterators to use, not null or empty or contain nulls
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* @return a combination iterator over the iterators
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* @throws NullPointerException if iterators collection is null or contains a null
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@ -497,6 +523,7 @@ public class IteratorUtils {
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* <p>
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* The comparator is optional. If null is specified then natural order is used.
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*
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* @param <E> the element type
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* @param comparator the comparator to use, may be null for natural order
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* @param iterator1 the first iterators to use, not null
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* @param iterator2 the first iterators to use, not null
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@ -519,10 +546,11 @@ public class IteratorUtils {
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* <p>
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* The comparator is optional. If null is specified then natural order is used.
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*
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* @param <E> the element type
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* @param comparator the comparator to use, may be null for natural order
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* @param iterators the iterators to use, not null or empty or contain nulls
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* @return a combination iterator over the iterators
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* @throws NullPointerException if iterators array is null or contains a null
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* @throws NullPointerException if iterators array is null or contains a null value
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*/
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public static <E> Iterator<E> collatedIterator(final Comparator<? super E> comparator,
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final Iterator<? extends E>[] iterators) {
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@ -539,6 +567,7 @@ public class IteratorUtils {
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* <p>
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* The comparator is optional. If null is specified then natural order is used.
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*
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* @param <E> the element type
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* @param comparator the comparator to use, may be null for natural order
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* @param iterators the iterators to use, not null or empty or contain nulls
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* @return a combination iterator over the iterators
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@ -600,6 +629,7 @@ public class IteratorUtils {
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* Under many circumstances, linking Iterators together in this manner is
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* more efficient (and convenient) than using nested for loops to extract a list.
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*
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* @param <E> the element type
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* @param root the root object to start iterating from, null results in an empty iterator
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* @param transformer the transformer to use, see above, null uses no effect transformer
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* @return a new object graph iterator
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@ -618,6 +648,8 @@ public class IteratorUtils {
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* The transformation occurs during the next() method and the underlying
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* iterator is unaffected by the transformation.
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*
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* @param <I> the input type
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* @param <O> the output type
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* @param iterator the iterator to use, not null
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* @param transform the transform to use, not null
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* @return a new transforming iterator
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@ -643,6 +675,7 @@ public class IteratorUtils {
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* The returned iterator will only return objects that match the specified
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* filtering predicate.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @param predicate the predicate to use as a filter, not null
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* @return a new filtered iterator
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@ -665,6 +698,7 @@ public class IteratorUtils {
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* The returned iterator will only return objects that match the specified
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* filtering predicate.
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*
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* @param <E> the element type
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* @param listIterator the list iterator to use, not null
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* @param predicate the predicate to use as a filter, not null
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* @return a new filtered iterator
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@ -691,6 +725,7 @@ public class IteratorUtils {
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* enough times to empty the collection, or if the collection is empty
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* to start with.
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*
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* @param <E> the element type
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* @param coll the collection to iterate over, not null
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* @return a new looping iterator
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* @throws NullPointerException if the collection is null
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@ -708,6 +743,7 @@ public class IteratorUtils {
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* The iterator will only stop looping if the remove method is called
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* enough times to empty the list, or if the list is empty to start with.
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*
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* @param <E> the element type
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* @param list the list to iterate over, not null
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* @return a new looping iterator
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* @throws NullPointerException if the list is null
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@ -725,6 +761,7 @@ public class IteratorUtils {
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/**
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* Gets an iterator that provides an iterator view of the given enumeration.
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*
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* @param <E> the element type
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* @param enumeration the enumeration to use
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* @return a new iterator
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*/
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@ -739,6 +776,7 @@ public class IteratorUtils {
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* Gets an iterator that provides an iterator view of the given enumeration
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* that will remove elements from the specified collection.
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*
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* @param <E> the element type
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* @param enumeration the enumeration to use
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* @param removeCollection the collection to remove elements from
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* @return a new iterator
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@ -757,6 +795,7 @@ public class IteratorUtils {
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/**
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* Gets an enumeration that wraps an iterator.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @return a new enumeration
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* @throws NullPointerException if iterator is null
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@ -769,11 +808,12 @@ public class IteratorUtils {
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}
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/**
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* Gets an iterable that wraps an iterator. The returned iterable can be
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* Gets an {@link Iterable} that wraps an iterator. The returned {@link Iterable} can be
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* used for a single iteration.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @return a new, single use iterable
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* @return a new, single use {@link Iterable}
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* @throws NullPointerException if iterator is null
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*/
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public static <E> Iterable<E> asIterable(final Iterator<? extends E> iterator) {
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@ -787,6 +827,7 @@ public class IteratorUtils {
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* Gets an iterable that wraps an iterator. The returned iterable can be
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* used for multiple iterations.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @return a new, multiple use iterable
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* @throws NullPointerException if iterator is null
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@ -804,6 +845,7 @@ public class IteratorUtils {
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* As the wrapped Iterator is traversed, a LinkedList of its values is
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* cached, permitting all required operations of ListIterator.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @return a new iterator
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* @throws NullPointerException if iterator parameter is null
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@ -839,11 +881,11 @@ public class IteratorUtils {
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* As the wrapped Iterator is traversed, an ArrayList of its values is
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* created. At the end, this is converted to an array.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @param arrayClass the class of array to create
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* @return an array of the iterator contents
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* @throws NullPointerException if iterator parameter is null
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* @throws NullPointerException if arrayClass is null
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* @throws NullPointerException if iterator parameter or arrayClass is null
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* @throws ClassCastException if the arrayClass is invalid
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*/
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public static <E> E[] toArray(final Iterator<? extends E> iterator, final Class<E> arrayClass) {
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@ -865,6 +907,7 @@ public class IteratorUtils {
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* As the wrapped Iterator is traversed, an ArrayList of its values is
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* created. At the end, the list is returned.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @return a list of the iterator contents
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* @throws NullPointerException if iterator parameter is null
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@ -879,6 +922,7 @@ public class IteratorUtils {
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* As the wrapped Iterator is traversed, an ArrayList of its values is
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* created. At the end, the list is returned.
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*
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* @param <E> the element type
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* @param iterator the iterator to use, not null
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* @param estimatedSize the initial size of the ArrayList
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* @return a list of the iterator contents
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