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/*
* Copyright (C) 2010 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;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
/**
* An entity class that describes the information required to send transactions
* between a device and an online DRM server. The DRM framework achieves
* server registration, license acquisition, and any other server-related transactions
* by passing an instance of this class to {@link DrmManagerClient#processDrmInfo}.
*<p>
* The caller can retrieve the {@link DrmInfo} instance by passing a {@link DrmInfoRequest}
* instance to {@link DrmManagerClient#acquireDrmInfo}.
*
*/
public class DrmInfo {
private byte[] mData;
private final String mMimeType;
private final int mInfoType;
// It would be used to add attributes specific to
// DRM scheme such as account id, path or multiple path's
private final HashMap<String, Object> mAttributes = new HashMap<String, Object>();
/**
* Creates a <code>DrmInfo</code> object with the given parameters.
*
* @param infoType The type of information.
* @param data The trigger data.
* @param mimeType The MIME type.
*/
public DrmInfo(int infoType, byte[] data, String mimeType) {
mInfoType = infoType;
mMimeType = mimeType;
mData = data;
if (!isValid()) {
final String msg = "infoType: " + infoType + "," +
"mimeType: " + mimeType + "," +
"data: " + data;
throw new IllegalArgumentException(msg);
}
}
/**
* Creates a <code>DrmInfo</code> object with the given parameters.
*
* @param infoType The type of information.
* @param path The trigger data.
* @param mimeType The MIME type.
*/
public DrmInfo(int infoType, String path, String mimeType) {
mInfoType = infoType;
mMimeType = mimeType;
try {
mData = DrmUtils.readBytes(path);
} catch (IOException e) {
// As the given path is invalid,
// set mData = null, so that further processDrmInfo()
// call would fail with IllegalArgumentException because of mData = null
mData = null;
}
if (!isValid()) {
final String msg = "infoType: " + infoType + "," +
"mimeType: " + mimeType + "," +
"data: " + mData;
throw new IllegalArgumentException();
}
}
/**
* Adds optional information as key-value pairs to this object. To add a custom object
* to the <code>DrmInfo</code> object, you must override the {@link #toString} implementation.
*
* @param key Key to add.
* @param value Value to add.
*
*/
public void put(String key, Object value) {
mAttributes.put(key, value);
}
/**
* Retrieves the value of a given key.
*
* @param key The key whose value is being retrieved.
*
* @return The value of the key being retrieved. Returns null if the key cannot be found.
*/
public Object get(String key) {
return mAttributes.get(key);
}
/**
* Retrieves an iterator object that you can use to iterate over the keys associated with
* this <code>DrmInfo</code> object.
*
* @return The iterator object.
*/
public Iterator<String> keyIterator() {
return mAttributes.keySet().iterator();
}
/**
* Retrieves an iterator object that you can use to iterate over the values associated with
* this <code>DrmInfo</code> object.
*
* @return The iterator object.
*/
public Iterator<Object> iterator() {
return mAttributes.values().iterator();
}
/**
* Retrieves the trigger data associated with this object.
*
* @return The trigger data.
*/
public byte[] getData() {
return mData;
}
/**
* Retrieves the MIME type associated with this object.
*
* @return The MIME type.
*/
public String getMimeType() {
return mMimeType;
}
/**
* Retrieves the information type associated with this object.
*
* @return The information type.
*/
public int getInfoType() {
return mInfoType;
}
/**
* Returns whether this instance is valid or not
*
* @return
* true if valid
* false if invalid
*/
boolean isValid() {
return (null != mMimeType && !mMimeType.equals("")
&& null != mData && mData.length > 0 && DrmInfoRequest.isValidType(mInfoType));
}
}
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