org.jfrog.build.api.util

Class CommonUtils

java.lang.Object

org.jfrog.build.api.util.CommonUtils

public class CommonUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
CommonUtils()

Method Summary

Modifier and Type	Method and Description
static <T> java.util.List<T>	concatLists(java.util.List<T> first, java.util.List<T> second) Returns a new list of the concatenation of the two provided lists.
static <T> java.lang.Iterable<T>	emptyIfNull(java.lang.Iterable<T> iterable) Returns an empty iterable if a null is passed.
static <K,V> java.util.Map<K,V>	entriesOnlyOnLeftMap(java.util.Map<K,V> left, java.util.Map<K,V> right) Returns a map with entries from the left map which keys aren't in the right map.
static <T> java.util.Collection<T>	filterCollection(java.util.Collection<T> unfiltered, java.util.function.Predicate<T> predicate) Returns a collection containing only the elements of the original collection that satisfy the predicate.
static <K,V> java.util.Map<K,V>	filterMapKeys(java.util.Map<K,V> map, java.util.function.Predicate<K> predicate) Returns a map containing only the keys of the original map that satisfy the predicate.
static <K,V> java.util.Map<K,V>	filterMapValues(java.util.Map<K,V> map, java.util.function.Predicate<V> predicate) Returns a map containing only the values of the original map that satisfy the predicate.
static <T> T	getFirstSatisfying(java.util.Collection<T> collection, java.util.function.Predicate<T> predicate, T defaultValue) Returns the first element in the provided collection that satisfies the predicate.
static <T> T	getLast(java.util.Collection<T> collection) Returns the last element in the collection.
static <T> T	getOnlyElement(java.util.Collection<T> collection) Returns the only element in the provided collection.
static void	handleJavaTmpdirProperty() Handle 'java.io.tmpdir' system property.
static <T> boolean	isAnySatisfying(java.util.Collection<T> collection, java.util.function.Predicate<T> predicate) Returns true if any of the elements in the provided collection satisfies the predicate.
static <E> java.util.HashSet<E>	newHashSet(E... elements) Returns a new HashSet of the provided elements.
static java.lang.String	readByCharset(java.io.File from, java.nio.charset.Charset charset) Read a string from a file using the provided Charset.
static <F,T> java.util.ArrayList<T>	transformList(java.lang.Iterable<F> iterable, java.util.function.Function<F,T> function) Outputs a new list after applying the provided function on every element in the provided list.
static void	writeByCharset(java.lang.String from, java.io.File to, java.nio.charset.Charset charset) Write a string to a file using the provided Charset.

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonUtils

public CommonUtils()

Method Detail

filterMapValues

public static <K,V> java.util.Map<K,V> filterMapValues(java.util.Map<K,V> map,
                                                       java.util.function.Predicate<V> predicate)

Returns a map containing only the values of the original map that satisfy the predicate. NOTE: This function filters null elements, so the predicate shouldn't be looking for one.

filterMapKeys

public static <K,V> java.util.Map<K,V> filterMapKeys(java.util.Map<K,V> map,
                                                     java.util.function.Predicate<K> predicate)

Returns a map containing only the keys of the original map that satisfy the predicate. NOTE: This function filters null elements, so the predicate shouldn't be looking for one.

entriesOnlyOnLeftMap

public static <K,V> java.util.Map<K,V> entriesOnlyOnLeftMap(java.util.Map<K,V> left,
                                                            java.util.Map<K,V> right)

Returns a map with entries from the left map which keys aren't in the right map.

concatLists

public static <T> java.util.List<T> concatLists(java.util.List<T> first,
                                                java.util.List<T> second)

Returns a new list of the concatenation of the two provided lists.

transformList

public static <F,T> java.util.ArrayList<T> transformList(java.lang.Iterable<F> iterable,
                                                         java.util.function.Function<F,T> function)

Outputs a new list after applying the provided function on every element in the provided list.

getFirstSatisfying

public static <T> T getFirstSatisfying(java.util.Collection<T> collection,
                                       java.util.function.Predicate<T> predicate,
                                       T defaultValue)

Returns the first element in the provided collection that satisfies the predicate. If no such element found, returns the defaultValue. NOTE: This function filters null elements, so the predicate shouldn't be looking for one.

isAnySatisfying

public static <T> boolean isAnySatisfying(java.util.Collection<T> collection,
                                          java.util.function.Predicate<T> predicate)

Returns true if any of the elements in the provided collection satisfies the predicate. Returns false otherwise. NOTE: This function filters null elements, so the predicate shouldn't be looking for one.

filterCollection

public static <T> java.util.Collection<T> filterCollection(java.util.Collection<T> unfiltered,
                                                           java.util.function.Predicate<T> predicate)

Returns a collection containing only the elements of the original collection that satisfy the predicate. NOTE: This function filters null elements, so the predicate shouldn't be looking for one.

getLast

public static <T> T getLast(java.util.Collection<T> collection)

Returns the last element in the collection. Returns null if collection is empty.

getOnlyElement

public static <T> T getOnlyElement(java.util.Collection<T> collection)

Returns the only element in the provided collection. If the collection doesn't have exactly one element, an exception is thrown.

writeByCharset

public static void writeByCharset(java.lang.String from,
                                  java.io.File to,
                                  java.nio.charset.Charset charset)
                           throws java.lang.RuntimeException

Write a string to a file using the provided Charset.

Throws:

java.lang.RuntimeException

readByCharset

public static java.lang.String readByCharset(java.io.File from,
                                             java.nio.charset.Charset charset)
                                      throws java.io.IOException

Read a string from a file using the provided Charset.

Throws:

java.io.IOException

newHashSet

public static <E> java.util.HashSet<E> newHashSet(E... elements)

Returns a new HashSet of the provided elements.

emptyIfNull

public static <T> java.lang.Iterable<T> emptyIfNull(java.lang.Iterable<T> iterable)

Returns an empty iterable if a null is passed. Useful for wrapping collections in foreach loops.

handleJavaTmpdirProperty

public static void handleJavaTmpdirProperty()

Handle 'java.io.tmpdir' system property. If not defined in POSIX compliant systems - use '/tmp' folder. If defined but directory does not exist - try to create it.

Throws:

java.lang.RuntimeException - if 'java.io.tmpdir' property is missing in Windows or the path is not accessible.