BooleanPropertyImpl.java

package de.take_weiland.mods.commons.meta;

import com.google.common.collect.ImmutableSet;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

import java.util.Set;

/**
 * @author diesieben07
 */
final class BooleanPropertyImpl extends GenericProperty<Boolean> implements BooleanProperty {

	private static final BooleanPropertyImpl[] cache = new BooleanPropertyImpl[32];

	static synchronized BooleanPropertyImpl get(int shift) {
		if (cache[shift] == null) {
			cache[shift] = new BooleanPropertyImpl(shift);
		}
		return cache[shift];
	}

	private final int mask;

	private BooleanPropertyImpl(int shift) {
		mask = 1 << shift;
	}

	@Override
	public boolean booleanValue(int metadata) {
		return (metadata & mask) != 0;
	}

	@Override
	public boolean booleanValue(ItemStack stack) {
		return booleanValue(stack.getItemDamage());
	}

	@Override
	public boolean booleanValue(World world, int x, int y, int z) {
		return booleanValue(world.getBlockMetadata(x, y, z));
	}

	@Override
	public int toMeta(boolean value, int previousMeta) {
		return value ? previousMeta | mask : previousMeta;
	}

	@Override
	public ItemStack apply(boolean value, ItemStack stack) {
		stack.setItemDamage(toMeta(value, stack.getItemDamage()));
		return stack;
	}

	@Override
	public void apply(boolean value, World world, int x, int y, int z) {
		world.setBlockMetadataWithNotify(x, y, z, toMeta(value, world.getBlockMetadata(x, y, z)), 3);
	}

	@Override
	public void apply(boolean value, World world, int x, int y, int z, int notifyFlags) {
		world.setBlockMetadataWithNotify(x, y, z, toMeta(value, world.getBlockMetadata(x, y, z)), notifyFlags);
	}

	@Override
	public Boolean value(int metadata) {
		return booleanValue(metadata);
	}

	@Override
	public int toMeta(Boolean value, int previousMeta) {
		return toMeta(value.booleanValue(), previousMeta);
	}

	private static final Set<Boolean> values = ImmutableSet.of(Boolean.FALSE, Boolean.TRUE);

	@Override
	public Set<Boolean> values() {
		return values;
	}

	@Override
	public boolean hasDistinctValues() {
		return true;
	}
}