org.wildfly.common.archive.TinyIndex Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.wildfly.common.archive;

import java.util.Arrays;

/**
 * An index for archives less than 64KB in size.
 */
final class TinyIndex extends Index {
    private final short[] table;

    TinyIndex(final int entries) {
        super(entries);
        final short[] array = new short[size()];
        Arrays.fill(array, (short) -1);
        this.table = array;
    }

    long get(final int index) {
        final int val = table[index];
        return val == -1 ? -1 : val & 0xffff;
    }

    void put(int index, final long offset) {
        final short[] table = this.table;
        int val = table[index];
        while (val != -1L) {
            index = index + 1 & getMask();
            val = table[index];
        }
        table[index] = (short) offset;
    }
}