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Updating a DRM policy with the Java API

Dernière mise à jour : 2 octobre 2023

To update a DRM policy with the Java API:

Set up your development environment and include in your project all of the JAR files listed in Setting up the development environment.
Create a DRM Policy instance and read the DRM policy from a file or database.
Policy policy = new Policy(policyBytes);

Update the DRM Policy object by setting its properties, such as its name and usage rules.

// Change the DRM policy name.
policy.setName("UpdatedDemoPolicy");

// Add DRM module restrictions to the play right
for (Right r: policy.getRights()) {
    if (r instanceof PlayRight) {
        PlayRight pr = (PlayRight) r;
        // Disallow Linux versions up to and including 1.9.  Allow
        // all other OSes and Linux versions above 1.9
        VersionInfo toExclude = new VersionInfo();
        toExclude.setOS("Linux");
        toExclude.setReleaseVersion("1.9");
        Collection<VersionInfo> exclusions = new ArrayList<VersionInfo>();
        exclusions.add(toExclude);
        ModuleRequirements drmRestrictions = new ModuleRequirements();
        drmRestrictions.setExcludedVersions(exclusions);
        pr.setDRMModuleRequirements(drmRestrictions);
        break;
    }
}

Serialize the updated DRM Policy object and store it in a file or database.

// Serialize the DRM policy.
byte[] policyBytes = policy.getBytes();
System.out.println("New DRM policy revision number: "
    +  policy.getRevision());
// Write the DRM policy to a file.
// Alternatively, the DRM policy may be stored in a database.
FileOutputStream out = new FileOutputStream("demopolicy-updated.pol");
out.write(policyBytes);
out.close();

See com.adobe.flashaccess.samples.policy.UpdatePolicy in the Reference Implementation Command Line Tools samples directory for the source of this sample code.

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