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Camunda 7 Keycloak Identity Provider Plugin including all transitive dependencies
/*
* Copyright 2017 VMware, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micrometer.common;
import io.micrometer.common.lang.Nullable;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import static java.util.stream.Collectors.joining;
/**
* An immutable collection of {@link KeyValue KeyValues} that are guaranteed to be sorted
* and deduplicated by key.
*
* @author Jon Schneider
* @author Maciej Walkowiak
* @author Phillip Webb
* @author Johnny Lim
* @since 1.10.0
*/
public final class KeyValues implements Iterable {
private static final KeyValues EMPTY = new KeyValues(new KeyValue[] {});
private final KeyValue[] keyValues;
private int last;
private KeyValues(KeyValue[] keyValues) {
this.keyValues = keyValues;
Arrays.sort(this.keyValues);
dedup();
}
private void dedup() {
int n = keyValues.length;
if (n == 0 || n == 1) {
last = n;
return;
}
// index of next unique element
int j = 0;
for (int i = 0; i < n - 1; i++)
if (!keyValues[i].getKey().equals(keyValues[i + 1].getKey()))
keyValues[j++] = keyValues[i];
keyValues[j++] = keyValues[n - 1];
last = j;
}
/**
* Return a new {@code KeyValues} instance by merging this collection and the
* specified key/value pair.
* @param key the key to add
* @param value the value to add
* @return a new {@code KeyValues} instance
*/
public KeyValues and(String key, String value) {
return and(KeyValue.of(key, value));
}
/**
* Return a new {@code KeyValues} instance by merging this collection and the
* specified key/value pairs.
* @param keyValues the key/value pairs to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public KeyValues and(@Nullable String... keyValues) {
if (blankVarargs(keyValues)) {
return this;
}
return and(KeyValues.of(keyValues));
}
/**
* Return a new {@code KeyValues} instance by merging this collection and the
* specified key values.
* @param keyValues the key values to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public KeyValues and(@Nullable KeyValue... keyValues) {
if (blankVarargs(keyValues)) {
return this;
}
KeyValue[] newKeyValues = new KeyValue[last + keyValues.length];
System.arraycopy(this.keyValues, 0, newKeyValues, 0, last);
System.arraycopy(keyValues, 0, newKeyValues, last, keyValues.length);
return new KeyValues(newKeyValues);
}
/**
* Return a new {@code KeyValues} instance by merging this collection and the key
* values extracted from the given elements.
* @param elements the source elements
* @param keyExtractor function to extract the key from the element
* @param valueExtractor function to extract the value from the element
* @return a new {@code KeyValues} instance
*/
public KeyValues and(@Nullable Iterable elements, Function keyExtractor,
Function valueExtractor) {
if (elements == null || !elements.iterator().hasNext()) {
return this;
}
Function mapper = element -> KeyValue.of(element, keyExtractor, valueExtractor);
Iterable keyValues = () -> StreamSupport.stream(elements.spliterator(), false).map(mapper).iterator();
return and(keyValues);
}
/**
* Return a new {@code KeyValues} instance by merging this collection and the
* specified key values.
* @param keyValues the key values to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public KeyValues and(@Nullable Iterable keyValues) {
if (keyValues == null || keyValues == EMPTY || !keyValues.iterator().hasNext()) {
return this;
}
if (this.keyValues.length == 0) {
return KeyValues.of(keyValues);
}
return and(KeyValues.of(keyValues).keyValues);
}
@Override
public Iterator iterator() {
return new ArrayIterator();
}
private class ArrayIterator implements Iterator {
private int currentIndex = 0;
@Override
public boolean hasNext() {
return currentIndex < last;
}
@Override
public KeyValue next() {
return keyValues[currentIndex++];
}
@Override
public void remove() {
throw new UnsupportedOperationException("cannot remove items from key values");
}
}
@Override
public Spliterator spliterator() {
return Spliterators.spliterator(keyValues, 0, last, Spliterator.IMMUTABLE | Spliterator.ORDERED
| Spliterator.DISTINCT | Spliterator.NONNULL | Spliterator.SORTED);
}
/**
* Return a stream of the contained key values.
* @return a key value stream
*/
public Stream stream() {
return StreamSupport.stream(spliterator(), false);
}
@Override
public int hashCode() {
int result = 1;
for (int i = 0; i < last; i++) {
result = 31 * result + keyValues[i].hashCode();
}
return result;
}
@Override
public boolean equals(@Nullable Object obj) {
return this == obj || (obj != null && getClass() == obj.getClass() && keyValuesEqual((KeyValues) obj));
}
private boolean keyValuesEqual(KeyValues obj) {
if (keyValues == obj.keyValues)
return true;
if (last != obj.last)
return false;
for (int i = 0; i < last; i++) {
if (!keyValues[i].equals(obj.keyValues[i]))
return false;
}
return true;
}
/**
* Return a new {@code KeyValues} instance by concatenating the specified collections
* of key values.
* @param keyValues the first set of key values, elements mustn't be null
* @param otherKeyValues the second set of key values, elements mustn't be null
* @return the merged key values
*/
public static KeyValues concat(@Nullable Iterable keyValues,
@Nullable Iterable otherKeyValues) {
return KeyValues.of(keyValues).and(otherKeyValues);
}
/**
* Return a new {@code KeyValues} instance by concatenating the specified key values
* and key/value pairs.
* @param keyValues the first set of key values, elements mustn't be null
* @param otherKeyValues the additional key/value pairs to add, elements mustn't be
* null
* @return the merged key values
*/
public static KeyValues concat(@Nullable Iterable keyValues,
@Nullable String... otherKeyValues) {
return KeyValues.of(keyValues).and(otherKeyValues);
}
/**
* Return a new {@code KeyValues} instance containing key values extracted from the
* given elements.
* @param elements the source elements
* @param keyExtractor function to extract the key from the element
* @param valueExtractor function to extract the value from the element
* @return a new {@code KeyValues} instance
*/
public static KeyValues of(@Nullable Iterable elements, Function keyExtractor,
Function valueExtractor) {
return empty().and(elements, keyExtractor, valueExtractor);
}
/**
* Return a new {@code KeyValues} instance containing key values constructed from the
* specified source key values.
* @param keyValues the key values to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public static KeyValues of(@Nullable Iterable keyValues) {
if (keyValues == null || keyValues == EMPTY || !keyValues.iterator().hasNext()) {
return KeyValues.empty();
}
else if (keyValues instanceof KeyValues) {
return (KeyValues) keyValues;
}
else if (keyValues instanceof Collection) {
Collection keyValuesCollection = (Collection) keyValues;
return new KeyValues(keyValuesCollection.toArray(new KeyValue[0]));
}
else {
return new KeyValues(StreamSupport.stream(keyValues.spliterator(), false).toArray(KeyValue[]::new));
}
}
/**
* Return a new {@code KeyValues} instance containing key value constructed from the
* specified key/value pair.
* @param key the key to add
* @param value the value to add
* @return a new {@code KeyValues} instance
*/
public static KeyValues of(String key, String value) {
return new KeyValues(new KeyValue[] { KeyValue.of(key, value) });
}
/**
* Return a new {@code KeyValues} instance containing key values constructed from the
* specified key/value pairs.
* @param keyValues the key/value pairs to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public static KeyValues of(@Nullable String... keyValues) {
if (blankVarargs(keyValues)) {
return empty();
}
if (keyValues.length % 2 == 1) {
throw new IllegalArgumentException("size must be even, it is a set of key=value pairs");
}
KeyValue[] keyValueArray = new KeyValue[keyValues.length / 2];
for (int i = 0; i < keyValues.length; i += 2) {
keyValueArray[i / 2] = KeyValue.of(keyValues[i], keyValues[i + 1]);
}
return new KeyValues(keyValueArray);
}
private static boolean blankVarargs(@Nullable Object[] args) {
return args == null || args.length == 0 || (args.length == 1 && args[0] == null);
}
/**
* Return a new {@code KeyValues} instance containing key values constructed from the
* specified key values.
* @param keyValues the key values to add, elements mustn't be null
* @return a new {@code KeyValues} instance
*/
public static KeyValues of(@Nullable KeyValue... keyValues) {
return empty().and(keyValues);
}
/**
* Return a {@code KeyValues} instance that contains no elements.
* @return an empty {@code KeyValues} instance
*/
public static KeyValues empty() {
return EMPTY;
}
@Override
public String toString() {
return stream().map(KeyValue::toString).collect(joining(",", "[", "]"));
}
}