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AdventurePropertiesImpl.java
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AdventurePropertiesImpl.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.internal.properties;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Optional;
import java.util.Properties;
import java.util.function.Function;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
final class AdventurePropertiesImpl {
private static final String FILESYSTEM_DIRECTORY_NAME = "config";
private static final String FILESYSTEM_FILE_NAME = "adventure.properties";
private static final Properties PROPERTIES = new Properties();
static {
final Path path = Optional.ofNullable(System.getProperty(systemPropertyName("config")))
.map(Paths::get)
.orElseGet(() -> Paths.get(FILESYSTEM_DIRECTORY_NAME, FILESYSTEM_FILE_NAME));
if (Files.isRegularFile(path)) {
try (final InputStream is = Files.newInputStream(path)) {
PROPERTIES.load(is);
} catch (final IOException e) {
// Well, that's awkward.
e.printStackTrace();
}
}
}
private AdventurePropertiesImpl() {
}
static @NotNull String systemPropertyName(final String name) {
return String.join(".", "net", "kyori", "adventure", name);
}
static <T> AdventureProperties.@NotNull Property<T> property(final @NotNull String name, final @NotNull Function<String, T> parser, final @Nullable T defaultValue) {
return new PropertyImpl<>(name, parser, defaultValue);
}
private static final class PropertyImpl<T> implements AdventureProperties.Property<T> {
private final String name;
private final Function<String, T> parser;
private final @Nullable T defaultValue;
private boolean valueCalculated;
private @Nullable T value;
PropertyImpl(final @NotNull String name, final @NotNull Function<String, T> parser, final @Nullable T defaultValue) {
this.name = name;
this.parser = parser;
this.defaultValue = defaultValue;
}
@Override
public @Nullable T value() {
if (!this.valueCalculated) {
final String property = systemPropertyName(this.name);
final String value = System.getProperty(property, PROPERTIES.getProperty(this.name));
if (value != null) {
this.value = this.parser.apply(value);
}
if (this.value == null) {
this.value = this.defaultValue;
}
this.valueCalculated = true;
}
return this.value;
}
@Override
public boolean equals(final @Nullable Object that) {
return this == that;
}
@Override
public int hashCode() {
return this.name.hashCode();
}
}
}