IntPropertyImpl.java

package de.take_weiland.mods.commons.meta;

import com.google.common.collect.ContiguousSet;
import com.google.common.collect.DiscreteDomain;
import com.google.common.collect.Range;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

import java.util.Set;

/**
 * @author diesieben07
 */
class IntPropertyImpl extends GenericProperty<Integer> implements IntProperty {

	private final int shift;
	private final int mask;
	private final Set<Integer> values;

	IntPropertyImpl(int shift, int bits) {
		this.shift = shift;
		this.mask = (1 << bits) - 1;
		values = ContiguousSet.create(Range.closedOpen(0, 1 << bits), DiscreteDomain.integers());
	}

	@Override
	public int intValue(int metadata) {
		return (metadata >> shift) & mask;
	}

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

	@Override
	public int intValue(ItemStack stack) {
		return intValue(stack.getItemDamage());
	}

	@Override
	public int toMeta(int value, int previousMeta) {
		return previousMeta | ((value & mask) << shift);
	}

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

	@Override
	public void apply(int 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(int 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 Integer value(int metadata) {
		return intValue(metadata);
	}

	@Override
	public int toMeta(Integer value, int previousMeta) {
		return toMeta(value.intValue(), previousMeta);
	}

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

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