MagicStack.java

package magic.model.stack;

import java.util.Arrays;
import java.util.LinkedList;

import magic.model.MagicCopyMap;
import magic.model.MagicPlayer;
import magic.model.MagicSource;
import magic.model.MurmurHash3;
import magic.model.event.MagicActivation;

@SuppressWarnings("serial")
public class MagicStack extends LinkedList<MagicItemOnStack> {

    private final int[] spells;
    private final int[] counts;

    public MagicStack() {
        spells=new int[2];
        counts=new int[2];
    }

    public MagicStack(final MagicCopyMap copyMap,final MagicStack source) {
        spells=Arrays.copyOf(source.spells,2);
        counts=Arrays.copyOf(source.counts,2);
        for (final MagicItemOnStack itemOnStack : source) {
            add(copyMap.copy(itemOnStack));
        }
    }

    private void addCount(final MagicItemOnStack itemOnStack) {
        final int index=itemOnStack.getController().getIndex();
        counts[index]++;
        if (itemOnStack.isSpell()) {
            spells[index]++;
        }
    }

    private void removeCount(final MagicItemOnStack itemOnStack) {
        final int index=itemOnStack.getController().getIndex();
        counts[index]--;
        if (itemOnStack.isSpell()) {
            spells[index]--;
        }
    }

    public void addToTop(final MagicItemOnStack itemOnStack) {
        addFirst(itemOnStack);
        addCount(itemOnStack);
    }

    public MagicItemOnStack removeFromTop() {
        final MagicItemOnStack oldTop = removeFirst();
        removeCount(oldTop);
        return oldTop;
    }

    public void addTo(final int index,final MagicItemOnStack itemOnStack) {
        add(index,itemOnStack);
        addCount(itemOnStack);
    }

    public void removeFrom(final int index) {
        final MagicItemOnStack itemOnStack=remove(index);
        removeCount(itemOnStack);
    }

    public void removeAllItems() {
        clear();
        Arrays.fill(counts,0);
        Arrays.fill(spells,0);
    }

    MagicItemOnStack getItemOnStack(final long id) {
        for (final MagicItemOnStack itemOnStack : this) {
            if (itemOnStack.getId()==id) {
                return itemOnStack;
            }
        }
        throw new RuntimeException("No corresponding MagicItemOnStack with id " + id);
    }

    public boolean hasItem() {
        return isEmpty() == false;
    }

    public boolean hasItem(final MagicSource source, final String description) {
        for (final MagicItemOnStack item : this) {
            if (item.getSource() == source && item.getDescription().equals(description)) {
                return true;
            }
        }
        return false;
    }

    public boolean hasActivationOnTop(final MagicSource source,final MagicActivation<?> act) {
        if (isEmpty()) {
            return false;
        }
        final MagicItemOnStack itemOnStack=getFirst();
        return itemOnStack.getSource() == source && itemOnStack.getActivation() == act;
    }

    public boolean hasItemOnTopOfPlayer(final MagicPlayer player) {
        if (isEmpty()) {
            return false;
        }
        final MagicItemOnStack top = getFirst();
        return top.getController()==player;
    }

    public boolean isResponse(final MagicPlayer player) {
        return counts[1-player.getIndex()]>0;
    }

    public boolean containsSpells() {
        return spells[0]>0||spells[1]>0;
    }

    public boolean containsOpponentSpells(final MagicPlayer player) {
        return spells[1-player.getIndex()]>0;
    }

    public long getStateId() {
        final long[] keys = new long[size()];
        int idx = 0;
        for (final MagicItemOnStack item : this) {
            keys[idx] = item.getStateId();
            idx++;
        }
        return MurmurHash3.hash(keys);
    }
}