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TagResolverBuilderImpl.java
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TagResolverBuilderImpl.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.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collector;
import net.kyori.adventure.text.minimessage.internal.TagInternals;
import net.kyori.adventure.text.minimessage.tag.Tag;
import org.jetbrains.annotations.NotNull;
import static java.util.Objects.requireNonNull;
final class TagResolverBuilderImpl implements TagResolver.Builder {
static final Collector<TagResolver, TagResolver.Builder, TagResolver> COLLECTOR = Collector.of(
TagResolver::builder,
TagResolver.Builder::resolver,
(left, right) -> TagResolver.builder().resolvers(left.build(), right.build()),
TagResolver.Builder::build
);
private final Map<String, Tag> replacements = new HashMap<>();
private final List<TagResolver> resolvers = new ArrayList<>();
@Override
public TagResolver.@NotNull Builder tag(final @NotNull String name, final @NotNull Tag tag) {
TagInternals.assertValidTagName(requireNonNull(name, "name"));
this.replacements.put(
name,
requireNonNull(tag, "tag")
);
return this;
}
@Override
public TagResolver.@NotNull Builder resolver(final @NotNull TagResolver resolver) {
if (resolver instanceof SequentialTagResolver) {
this.resolvers(((SequentialTagResolver) resolver).resolvers, false);
} else if (!this.consumePotentialMappable(resolver)) {
this.popMap();
this.resolvers.add(requireNonNull(resolver, "resolver"));
}
return this;
}
@Override
public TagResolver.@NotNull Builder resolvers(final @NotNull TagResolver @NotNull... resolvers) {
return this.resolvers(resolvers, true);
}
private TagResolver.@NotNull Builder resolvers(final @NotNull TagResolver @NotNull[] resolvers, final boolean forwards) {
boolean popped = false;
requireNonNull(resolvers, "resolvers");
if (forwards) {
for (final TagResolver resolver : resolvers) {
popped = this.single(resolver, popped);
}
} else {
for (int i = resolvers.length - 1; i >= 0; i--) {
popped = this.single(resolvers[i], popped);
}
}
return this;
}
@Override
public TagResolver.@NotNull Builder resolvers(final @NotNull Iterable<? extends TagResolver> resolvers) {
boolean popped = false;
for (final TagResolver resolver : requireNonNull(resolvers, "resolvers")) {
popped = this.single(resolver, popped);
}
return this;
}
private boolean single(final TagResolver resolver, final boolean popped) {
if (resolver instanceof SequentialTagResolver) {
this.resolvers(((SequentialTagResolver) resolver).resolvers, false);
} else if (!this.consumePotentialMappable(resolver)) {
if (!popped) {
this.popMap();
}
this.resolvers.add(requireNonNull(resolver, "resolvers[?]"));
return true;
}
return false;
}
private void popMap() {
if (!this.replacements.isEmpty()) {
this.resolvers.add(new MapTagResolver(new HashMap<>(this.replacements)));
this.replacements.clear();
}
}
private boolean consumePotentialMappable(final TagResolver resolver) {
if (resolver instanceof MappableResolver) {
return ((MappableResolver) resolver).contributeToMap(this.replacements);
} else {
return false;
}
}
@Override
public @NotNull TagResolver build() {
this.popMap();
if (this.resolvers.size() == 0) {
return EmptyTagResolver.INSTANCE;
} else if (this.resolvers.size() == 1) {
return this.resolvers.get(0);
} else {
final TagResolver[] resolvers = this.resolvers.toArray(new TagResolver[0]);
Collections.reverse(Arrays.asList(resolvers));
return new SequentialTagResolver(resolvers);
}
}
}