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package cdc.util.tuples;

import java.util.Arrays;

/**
 * Tuple of N values, all with the same type.
 *
 * @author Damien Carbonne
 *
 * @param  Value type.
 */
public class TupleN implements Tuple {
    private final T[] values;

    @SafeVarargs
    public TupleN(T... values) {
        this.values = values.clone();
    }

    @Override
    public int size() {
        return values.length;
    }

    @Override
    public T getValue(int index) {
        if (index >= 0 && index < size()) {
            return values[index];
        } else {
            throw new IndexOutOfBoundsException();
        }
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) {
            return true;
        }
        if (!(other instanceof TupleN)) {
            return false;
        }
        final TupleN o = (TupleN) other;
        return Arrays.equals(values, o.values);
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(values);
    }

    @Override
    public String toString() {
        final StringBuilder builder = new StringBuilder();
        boolean first = true;
        builder.append('[');
        for (int index = 0; index < values.length; index++) {
            if (first) {
                first = false;
            } else {
                builder.append(", ");
            }
            builder.append(values[index]);
        }
        builder.append(']');
        return builder.toString();
    }
}