Unable to inflate a buffer deflated with java.util.zip.Deflater using Apache MINA compression filter

Question

This test:

import java.util.zip.Deflater;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.filter.support.Zlib;
import org.junit.*;

public class ZlibTest {
    private Deflater deflater = null;

    private Zlib inflater = null;

    @Before
    public void setUp() throws Exception {
        deflater = new Deflater(Deflater.BEST_COMPRESSION);
        deflater.setStrategy(Deflater.DEFAULT_STRATEGY);
        inflater = new Zlib(Zlib.COMPRESSION_MAX, Zlib.MODE_INFLATER);
    }

    @Test
    public void testInflate() throws Exception {
        byte[] compressed = new byte[14];
        deflater.setInput(new byte[] {1});
        deflater.finish();
        int bytesCompressed = deflater.deflate(compressed);
        IoBuffer compressedBuffer = IoBuffer.wrap(compressed, 0, bytesCompressed);
        System.out.println(compressedBuffer);

        IoBuffer byteUncompressed = inflater.inflate(compressedBuffer);
    }
}

fails:

java.io.IOException: Unknown error. Error code : 1
    at org.apache.mina.filter.support.Zlib.inflate(Zlib.java:136)
    at ZlibTest.testInflate(ZlibTest.java:29)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
    at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

What is going wrong here?

UPDATE: if I add

        case JZlib.Z_STREAM_END:

to line 139 in Zlib.java, it decodes fine.

Answer 1

With regards to https://bugs.java.com/bugdatabase/view_bug?bug_id=4255743 (famous, 13 year old bug - would go to the highschool shortly if it were my kid), the fix has been delivered in Java 7 (at last); indeed, there's a

public int deflate(byte[] b, int off, int len, int flush) {
    if (b == null) {
        throw new NullPointerException();
    }
    if (off < 0 || len < 0 || off > b.length - len) {
        throw new ArrayIndexOutOfBoundsException();
    }
    synchronized (zsRef) {
        ensureOpen();
        if (flush == NO_FLUSH || flush == SYNC_FLUSH ||
            flush == FULL_FLUSH)
            return deflateBytes(zsRef.address(), b, off, len, flush);
        throw new IllegalArgumentException();
    }
}

section of code added to Deflater class. So today (2012), you can just stick with java.util if that functionality is all that you need.