org.wildfly.common.archive.JDKSpecific 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).

There is a newer version: 35.0.0.Beta1

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package org.wildfly.common.archive;

import static java.lang.Math.min;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;

/**
 */
final class JDKSpecific {
    private JDKSpecific() {}

    static ByteBuffer inflate(final Inflater inflater, final ByteBuffer[] bufs, final long offset, final int compSize, final int uncompSize) throws DataFormatException, IOException {
        int cnt = 0;
        byte[] b = new byte[min(16384, compSize)];
        byte[] out = new byte[uncompSize];
        int op = 0;
        while (cnt < compSize) {
            int rem = compSize - cnt;
            final int acnt = min(rem, b.length);
            Archive.readBytes(bufs, offset, b, 0, acnt);
            cnt += acnt;
            inflater.setInput(b, 0, acnt);
            do {
                op += inflater.inflate(out, op, uncompSize - op);
            } while (! inflater.needsInput());
        }
        if (! inflater.finished()) {
            throw new IOException("Corrupted compression stream");
        }
        return ByteBuffer.wrap(out);
    }
}