package org.springframework.boot.configurationprocessor.metadata;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
public class ConfigurationMetadata {
private static final Set<Character> SEPARATORS;
static {
List<Character> chars = Arrays.asList('-', '_');
SEPARATORS = Collections.unmodifiableSet(new HashSet<>(chars));
}
private final Map<String, List<ItemMetadata>> items;
private final Map<String, List<ItemHint>> hints;
public ConfigurationMetadata() {
this.items = new LinkedHashMap<>();
this.hints = new LinkedHashMap<>();
}
public ConfigurationMetadata(ConfigurationMetadata metadata) {
this.items = new LinkedHashMap<>(metadata.items);
this.hints = new LinkedHashMap<>(metadata.hints);
}
public void add(ItemMetadata itemMetadata) {
add(this.items, itemMetadata.getName(), itemMetadata, false);
}
public void addIfMissing(ItemMetadata itemMetadata) {
add(this.items, itemMetadata.getName(), itemMetadata, true);
}
public void add(ItemHint itemHint) {
add(this.hints, itemHint.getName(), itemHint, false);
}
public void merge(ConfigurationMetadata metadata) {
for (ItemMetadata additionalItem : metadata.getItems()) {
mergeItemMetadata(additionalItem);
}
for (ItemHint itemHint : metadata.getHints()) {
add(itemHint);
}
}
public List<ItemMetadata> getItems() {
return flattenValues(this.items);
}
public List<ItemHint> getHints() {
return flattenValues(this.hints);
}
protected void mergeItemMetadata(ItemMetadata metadata) {
ItemMetadata matching = findMatchingItemMetadata(metadata);
if (matching != null) {
if (metadata.getDescription() != null) {
matching.setDescription(metadata.getDescription());
}
if (metadata.getDefaultValue() != null) {
matching.setDefaultValue(metadata.getDefaultValue());
}
ItemDeprecation deprecation = metadata.getDeprecation();
ItemDeprecation matchingDeprecation = matching.getDeprecation();
if (deprecation != null) {
if (matchingDeprecation == null) {
matching.setDeprecation(deprecation);
}
else {
if (deprecation.getReason() != null) {
matchingDeprecation.setReason(deprecation.getReason());
}
if (deprecation.getReplacement() != null) {
matchingDeprecation.setReplacement(deprecation.getReplacement());
}
if (deprecation.getLevel() != null) {
matchingDeprecation.setLevel(deprecation.getLevel());
}
}
}
}
else {
add(this.items, metadata.getName(), metadata, false);
}
}
private <K, V> void add(Map<K, List<V>> map, K key, V value, boolean ifMissing) {
List<V> values = map.computeIfAbsent(key, (k) -> new ArrayList<>());
if (!ifMissing || values.isEmpty()) {
values.add(value);
}
}
private ItemMetadata findMatchingItemMetadata(ItemMetadata metadata) {
List<ItemMetadata> candidates = this.items.get(metadata.getName());
if (candidates == null || candidates.isEmpty()) {
return null;
}
candidates = new ArrayList<>(candidates);
candidates.removeIf((itemMetadata) -> !itemMetadata.hasSameType(metadata));
if (candidates.size() > 1 && metadata.getType() != null) {
candidates.removeIf((itemMetadata) -> !metadata.getType().equals(itemMetadata.getType()));
}
if (candidates.size() == 1) {
return candidates.get(0);
}
for (ItemMetadata candidate : candidates) {
if (nullSafeEquals(candidate.getSourceType(), metadata.getSourceType())) {
return candidate;
}
}
return null;
}
private boolean nullSafeEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
return o1 != null && o1.equals(o2);
}
public static String nestedPrefix(String prefix, String name) {
String nestedPrefix = (prefix != null) ? prefix : "";
String dashedName = toDashedCase(name);
nestedPrefix += (nestedPrefix == null || nestedPrefix.isEmpty()) ? dashedName : "." + dashedName;
return nestedPrefix;
}
static String toDashedCase(String name) {
StringBuilder dashed = new StringBuilder();
Character previous = null;
for (char current : name.toCharArray()) {
if (SEPARATORS.contains(current)) {
dashed.append("-");
}
else if (Character.isUpperCase(current) && previous != null && !SEPARATORS.contains(previous)) {
dashed.append("-").append(current);
}
else {
dashed.append(current);
}
previous = current;
}
return dashed.toString().toLowerCase(Locale.ENGLISH);
}
private static <T extends Comparable<T>> List<T> flattenValues(Map<?, List<T>> map) {
List<T> content = new ArrayList<>();
for (List<T> values : map.values()) {
content.addAll(values);
}
Collections.sort(content);
return content;
}
@Override
public String toString() {
StringBuilder result = new StringBuilder();
result.append(String.format("items: %n"));
this.items.values().forEach((itemMetadata) -> result.append("\t").append(String.format("%s%n", itemMetadata)));
return result.toString();
}
}