de.schlichtherle.truezip.fs.inst.InstrumentingCompositeDriver Maven / Gradle / Ivy

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This module provides a file system manager and an I/O pool service for managing and monitoring TrueZIP via JMX and java.util.logging. Add the JAR artifact of this module to the run time class path to make its services available for service location in the client API modules.

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/*
 * Copyright (C) 2005-2015 Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package de.schlichtherle.truezip.fs.inst;

import de.schlichtherle.truezip.fs.FsCompositeDriver;
import de.schlichtherle.truezip.fs.FsController;
import de.schlichtherle.truezip.fs.FsManager;
import de.schlichtherle.truezip.fs.FsModel;
import javax.annotation.CheckForNull;
import javax.annotation.concurrent.Immutable;

/**
 * @author  Christian Schlichtherle
 */
@Immutable
public class InstrumentingCompositeDriver implements FsCompositeDriver {

    protected final FsCompositeDriver delegate;
    protected final InstrumentingDirector director;

    public InstrumentingCompositeDriver(final FsCompositeDriver driver,
                                        final InstrumentingDirector director) {
        if (null == driver || null == director)
            throw new NullPointerException();
        this.director = director;
        this.delegate = driver;
    }

    @Override
    public FsController newController(
            final FsManager manager,
            final FsModel model,
            final @CheckForNull FsController parent) {
        assert null == parent
                    ? null == model.getParent()
                    : parent.getModel().equals(model.getParent());
        return director.instrument(delegate.newController(manager, director.instrument(model, this), parent), this);
    }

    @Override
    public String toString() {
        return String.format("%s[delegate=%s]", getClass().getName(), delegate);
    }
}