Code/net/minecraft/world/level/block/state/properties/EnumProperty.java

package net.minecraft.world.level.block.state.properties;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import net.minecraft.util.StringRepresentable;

public final class EnumProperty<T extends Enum<T> & StringRepresentable> extends Property<T> {
    private final List<T> values;
    private final Map<String, T> names;
    private final int[] ordinalToIndex;

    private EnumProperty(String p_61579_, Class<T> p_61580_, List<T> p_368786_) {
        super(p_61579_, p_61580_);
        if (p_368786_.isEmpty()) {
            throw new IllegalArgumentException("Trying to make empty EnumProperty '" + p_61579_ + "'");
        } else {
            this.values = List.copyOf(p_368786_);
            T[] at = p_61580_.getEnumConstants();
            this.ordinalToIndex = new int[at.length];

            for (T t : at) {
                this.ordinalToIndex[t.ordinal()] = p_368786_.indexOf(t);
            }

            Builder<String, T> builder = ImmutableMap.builder();

            for (T t1 : p_368786_) {
                String s = t1.getSerializedName();
                builder.put(s, t1);
            }

            this.names = builder.buildOrThrow();
        }
    }

    @Override
    public List<T> getPossibleValues() {
        return this.values;
    }

    @Override
    public Optional<T> getValue(String p_61604_) {
        return Optional.ofNullable(this.names.get(p_61604_));
    }

    public String getName(T p_61586_) {
        return p_61586_.getSerializedName();
    }

    public int getInternalIndex(T p_363721_) {
        return this.ordinalToIndex[p_363721_.ordinal()];
    }

    @Override
    public boolean equals(Object p_61606_) {
        if (this == p_61606_) {
            return true;
        } else {
            return p_61606_ instanceof EnumProperty<?> enumproperty && super.equals(p_61606_) ? this.values.equals(enumproperty.values) : false;
        }
    }

    @Override
    public int generateHashCode() {
        int i = super.generateHashCode();
        return 31 * i + this.values.hashCode();
    }

    public static <T extends Enum<T> & StringRepresentable> EnumProperty<T> create(String p_61588_, Class<T> p_61589_) {
        return create(p_61588_, p_61589_, p_187560_ -> true);
    }

    public static <T extends Enum<T> & StringRepresentable> EnumProperty<T> create(String p_61595_, Class<T> p_61596_, Predicate<T> p_61597_) {
        return create(p_61595_, p_61596_, Arrays.<T>stream(p_61596_.getEnumConstants()).filter(p_61597_).collect(Collectors.toList()));
    }

    @SafeVarargs
    public static <T extends Enum<T> & StringRepresentable> EnumProperty<T> create(String p_61599_, Class<T> p_61600_, T... p_61601_) {
        return create(p_61599_, p_61600_, List.of(p_61601_));
    }

    public static <T extends Enum<T> & StringRepresentable> EnumProperty<T> create(String p_61591_, Class<T> p_61592_, List<T> p_367534_) {
        return new EnumProperty<>(p_61591_, p_61592_, p_367534_);
    }
}