added VersionUtil class and utility method for obtaining file version information

[mlfreeman2]

It obtains the 'major', 'minor', 'revision', and 'build' version from a given file.
Added unit test for it - it does not require any new Win32 mappings for Version.dll

[lgoldstein]

Instead of returning an int[], return a class - e.g.:

public class VersionInfo implements Serializable, Cloneable, Comparable<VersionInfo> {
    private static final long serialVersionUID = ...generate it via the IDE...;

    private int major = -1;
    private int minor = -1;
    private int buildNumber = -1;
    private int revision = -1;

    public VersionInfo() {
          super();
    }

    public VersionInfo(int major, int minor, int buildNumber, int release) {
        this.minor/major/build/release = ...respective parameter...
    }

    public int getMajor/Minor/BuildNumber/Release() { 
        return ...respective member...
    }

    public void setMajor/Minor/BuildNumber/Release(int value) {
        this..minor/major/build/release = value;
    }

   @Override
    public int hashCode() {
        ...
    }

   @Override
    public boolean equals(Object o) {
        ...check if null, this == o and getClass() == o.getClass()...
       return compare((VersionInfo) o) == 0;
    }

    @Override
    public int compare(VersionInfo other) {
        ..check if other is null or this...
       ...compare major/minor/build/release - in this order...
    }

    @Override
    public VersionInfo clone() {
        try {
            return getClass().cast(super.clone());
        } catch(CloneNotSupportedException e) { // unexpected
            throw new RuntimeException("Failed to clone: " + toString(), e);
        }
    }

   @Override
    public String toString() {
        return getMajor() + "." + getMinor() + "." + getBuildNumber() + "." + getRevision();
    }

}

This way one does not need to remember which index in the array is the major/minor/build/revision...

[mlfreeman2]

How does this sound as an option?

1. Change the method name to getFileVersionInfo()
2. Return the VS_FIXEDFILEINFO that I already have in the function.
3. Add the following four getters to VS_FIXEDFILEINFO:

        public int getFileVersionMajor() {
            return dwFileVersionMS.intValue() >>> 16;
        }

        public int getFileVersionMinor() {
            return dwFileVersionMS.intValue() & 0xffff;
        }

        public int getFileVersionRevision() {
            return dwFileVersionLS.intValue() >>> 16;
        }

        public int getFileVersionBuild() {
            return dwFileVersionLS.intValue() & 0xffff;
        }

[dblock]

This is great. Feel free to address @lgoldstein's minor test comments and please fix that period! (very important :)).

[mlfreeman2]

@dblock, @lgoldstein - feedback should be addressed.

[dblock]

Merged.