org.trypticon.hex.interpreters.AbstractFixedLengthInterpreter Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of hex-interpreter Show documentation

API for interpreting runs of binary as values humans can understand

The newest version!

/*
 * Hex - a hex viewer and annotator
 * Copyright (C) 2009-2014,2016-2017  Trejkaz, Hex Project
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.trypticon.hex.interpreters;

import org.trypticon.hex.binary.Binary;

import javax.annotation.Nonnull;

/**
 * Base convenience class for implementing fixed-length interpreters.
 *
 * @param  the value type.
 * @author trejkaz
 */
public abstract class AbstractFixedLengthInterpreter
        extends AbstractInterpreter
        implements FixedLengthInterpreter {

    private final long valueLength;

    protected AbstractFixedLengthInterpreter(Class type, long valueLength) {
        super(type);
        this.valueLength = valueLength;
    }

    @Override
    public long getValueLength() {
        return valueLength;
    }

    /**
     * Interprets the value for a range.
     *
     * @param binary the binary.
     * @param position the position of the start of the value.
     * @return the value.
     */
    @Nonnull
    protected abstract V interpret(@Nonnull Binary binary, long position);

    @Nonnull
    @Override
    public final V interpret(@Nonnull Binary binary, long position, long length) {
        if (length != valueLength) {
            throw new IllegalArgumentException("Only supports values of length " + valueLength
                    + " but got " + length);
        }

        return interpret(binary, position);
    }
}