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/*
 * Copyright (c) 2014 "Kaazing Corporation," (www.kaazing.com)
 *
 * This file is part of Robot.
 *
 * Robot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see .
 */

package org.kaazing.robot.lang.ast.matcher;

import static org.kaazing.robot.lang.ast.util.AstUtil.equivalent;

import java.util.Arrays;

public class AstExactBytesMatcher extends AstValueMatcher {

    private final byte[] value;

    public AstExactBytesMatcher(byte[] value) {
        if (value == null) {
            throw new NullPointerException("value");
        }
        this.value = value;
    }

    public byte[] getValue() {
        return value;
    }

    @Override
    public  R accept(Visitor visitor, P parameter) throws Exception {

        return visitor.visit(this, parameter);
    }

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

    @Override
    public boolean equals(Object obj) {
        return (this == obj) || (obj instanceof AstExactBytesMatcher) && equalTo((AstExactBytesMatcher) obj);
    }

    protected boolean equalTo(AstExactBytesMatcher that) {
        return equivalent(this.value, that.value);
    }

    @Override
    public String toString() {
        if (value == null || value.length == 0) {
            return "[]";
        }

        StringBuffer buf = new StringBuffer();
        for (byte b : value) {
            buf.append(String.format(" 0x%02x", b));
        }

        buf.setCharAt(0, '[');
        buf.append(']');
        return buf.toString();
    }
}