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Android example source code file (DrmRights.java)

This example Android source code file (DrmRights.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

drm_permission_display, drm_permission_execute, drm_permission_play, drm_permission_print, drmconstraintinfo, drmrights, jni_drm_failure, jni_drm_success, string, unsatisfiedlinkerror

The DrmRights.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.drm.mobile1;

/**
 * This class provides interfaces to access the DRM rights.
 */
public class DrmRights {
    /**
     * The DRM permission of play.
     */
    public static final int DRM_PERMISSION_PLAY = 1;

    /**
     * The DRM permission of display.
     */
    public static final int DRM_PERMISSION_DISPLAY = 2;

    /**
     * The DRM permission of execute.
     */
    public static final int DRM_PERMISSION_EXECUTE = 3;

    /**
     * The DRM permission of print.
     */
    public static final int DRM_PERMISSION_PRINT = 4;

    /**
     * Successful operation.
     */
    private static final int JNI_DRM_SUCCESS = 0;

    /**
     * General failure.
     */
    private static final int JNI_DRM_FAILURE = -1;

    /**
     * The uid of this rights object.
     */
    private String roId = "";


    /**
     * Construct the DrmRights.
     */
    public DrmRights() {
    }

    /**
     * Get the constraint of the given permission on this rights object.
     *
     * @param permission    the given permission.
     *
     * @return a DrmConstraint instance.
     */
    public DrmConstraintInfo getConstraint(int permission) {
        DrmConstraintInfo c = new DrmConstraintInfo();

        /* call native method to get latest constraint information */
        int res = nativeGetConstraintInfo(permission, c);

        if (JNI_DRM_FAILURE == res)
            return null;

        return c;
    }

    /**
     * Consume the rights of the given permission.
     *
     * @param permission    the given permission.
     *
     * @return true if consume success.
     *         false if consume failure.
     */
    public boolean consumeRights(int permission) {
        /* call native method to consume and update rights */
        int res = nativeConsumeRights(permission);

        if (JNI_DRM_FAILURE == res)
            return false;

        return true;
    }


    /**
     * native method: get the constraint information of the given permission.
     *
     * @param permission    the given permission.
     * @param constraint    the instance of constraint.
     *
     * @return #JNI_DRM_SUCCESS if succeed.
     *         #JNI_DRM_FAILURE if fail.
     */
    private native int nativeGetConstraintInfo(int permission, DrmConstraintInfo constraint);

    /**
     * native method: consume the rights of the given permission.
     *
     * @param permission    the given permission.
     *
     * @return #JNI_DRM_SUCCESS if succeed.
     *         #JNI_DRM_FAILURE if fail.
     */
    private native int nativeConsumeRights(int permission);


    /**
     * Load the shared library to link the native methods.
     */
    static {
        try {
            System.loadLibrary("drm1_jni");
        }
        catch (UnsatisfiedLinkError ule) {
            System.err.println("WARNING: Could not load libdrm1_jni.so");
        }
    }
}

Other Android examples (source code examples)

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