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CachingTagResolver.java
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CachingTagResolver.java
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/*
* This file is part of adventure, licensed under the MIT License.
*
* Copyright (c) 2017-2022 KyoriPowered
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.kyori.adventure.text.minimessage.tag.resolver;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.minimessage.internal.serializer.ClaimConsumer;
import net.kyori.adventure.text.minimessage.internal.serializer.SerializableResolver;
import net.kyori.adventure.text.minimessage.tag.Inserting;
import net.kyori.adventure.text.minimessage.tag.Tag;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
final class CachingTagResolver implements TagResolver.WithoutArguments, MappableResolver, SerializableResolver {
private static final Tag NULL_REPLACEMENT = (Inserting) () -> {
throw new UnsupportedOperationException("no-op null tag");
};
private final Map<String, Tag> cache = new HashMap<>();
private final TagResolver.WithoutArguments resolver;
CachingTagResolver(final TagResolver.WithoutArguments resolver) {
this.resolver = resolver;
}
private Tag query(final @NotNull String key) {
return this.cache.computeIfAbsent(key, k -> {
final @Nullable Tag result = this.resolver.resolve(k);
return result == null ? NULL_REPLACEMENT : result;
});
}
@Override
public @Nullable Tag resolve(final @NotNull String name) {
final Tag potentialValue = this.query(name);
return potentialValue == NULL_REPLACEMENT ? null : potentialValue;
}
@Override
public boolean has(final @NotNull String name) {
return this.query(name) != NULL_REPLACEMENT;
}
@Override
public boolean contributeToMap(final @NotNull Map<String, Tag> map) {
if (this.resolver instanceof MappableResolver) {
return ((MappableResolver) this.resolver).contributeToMap(map);
} else {
return false;
}
}
@Override
public void handle(final @NotNull Component serializable, final @NotNull ClaimConsumer consumer) {
if (this.resolver instanceof SerializableResolver) {
((SerializableResolver) this.resolver).handle(serializable, consumer);
}
}
@Override
public boolean equals(final @Nullable Object other) {
if (this == other) {
return true;
}
if (!(other instanceof CachingTagResolver)) {
return false;
}
final CachingTagResolver that = (CachingTagResolver) other;
return Objects.equals(this.resolver, that.resolver);
}
@Override
public int hashCode() {
return Objects.hash(this.cache, this.resolver);
}
}