RangeIdentifier.java

package chatty.util.commands;

import chatty.util.StringUtil;
import java.util.Collection;
import java.util.Set;

/**
 * Item using a range of Custom Command parameters for replacement.
 * 
 * @author tduva
 */
class RangeIdentifier implements Item {

    private final int index;
    private final boolean toEnd;

    public RangeIdentifier(int index, boolean toEnd) {
        this.index = index;
        this.toEnd = toEnd;
    }

    @Override
    public String replace(Parameters parameters) {
        Collection<String> range = parameters.getRange(index - 1, toEnd);
        if (range == null) {
            return null;
        }
        return StringUtil.join(range, " ");
    }

    @Override
    public String toString() {
        return "$" + index + (toEnd ? "-" : "");
    }

    @Override
    public Set<String> getIdentifiersWithPrefix(String prefix) {
        return null;
    }
    
    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        RangeIdentifier other = (RangeIdentifier)obj;
        if (index != other.index) {
            return false;
        }
        if (toEnd != other.toEnd) {
            return false;
        }
        return true;
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 37 * hash + this.index;
        hash = 37 * hash + (this.toEnd ? 1 : 0);
        return hash;
    }

}