src/plugins/certmanager/src/com/motorolamobility/studio/android/certmanager/ui/model/SigningAndKeysModelManager.java

/*
 * Copyright (C) 2012 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 com.motorolamobility.studio.android.certmanager.ui.model;

import java.io.File;
import java.util.List;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.osgi.util.NLS;

import com.motorola.studio.android.common.log.StudioLogger;
import com.motorola.studio.android.common.utilities.EclipseUtils;
import com.motorolamobility.studio.android.certmanager.CertificateManagerActivator;
import com.motorolamobility.studio.android.certmanager.core.BackwardKeystoreManager;
import com.motorolamobility.studio.android.certmanager.core.KeyStoreManager;
import com.motorolamobility.studio.android.certmanager.core.PasswordProvider;
import com.motorolamobility.studio.android.certmanager.exception.KeyStoreManagerException;
import com.motorolamobility.studio.android.certmanager.i18n.CertificateManagerNLS;
import com.motorolamobility.studio.android.certmanager.views.KeystoreManagerView;

/**
 * Provides services to map and unmap keystores.
 * Also get access to the root node and populates on first access (based on {@link KeyStoreManager}). 
 *
 */
public class SigningAndKeysModelManager
{
    private KeyStoreRootNode keyStoresRootNode = new KeyStoreRootNode();

    private static SigningAndKeysModelManager _instance = null;

    private SigningAndKeysModelManager()
    {
    }

    public static synchronized SigningAndKeysModelManager getInstance()
    {
        if (_instance == null)
        {
            _instance = new SigningAndKeysModelManager();
            _instance.populateKeyStoreRootNode();
        }
        return _instance;
    }

    public File[] getKeystoreFiles()
    {
        List<ITreeNode> nodes = keyStoresRootNode.getChildren();

        File[] files = new File[nodes.size()];
        int i = 0;
        for (ITreeNode node : nodes)
        {

            File file = ((KeyStoreNode) node).getFile();
            files[i++] = file;
        }

        return files;
    }

    public KeyStoreRootNode populateKeyStoreRootNode()
    {
        try
        {
            List<IKeyStore> keyStores = KeyStoreManager.getInstance().getKeyStores();
            if (keyStores != null)
            {
                if (keyStores.size() > 0)
                {
                    //there are items mapped on persistence
                    for (IKeyStore keyStore : keyStores)
                    {
                        if (keyStore instanceof KeyStoreNode)
                        {
                            keyStoresRootNode.addKeyStoreNode((KeyStoreNode) keyStore);
                        }
                    }
                }
                else
                {
                    //we do not have any item mapped in persistence
                    //try to import from old Motodev keystore 
                    //(probably it is the first time user is trying to use the view)
                    BackwardKeystoreManager backwardKeystoreManager = new BackwardKeystoreManager();
                    backwardKeystoreManager.mapOldKeystore();
                }
            }
        }
        catch (Exception e)
        {
            StudioLogger.error(KeystoreManagerView.class, e.getMessage(), e);
            EclipseUtils
                    .showErrorDialog(
                            CertificateManagerNLS.KeystoreManagerView_ErrorLoadingMappedKeystoresFromPersistence,
                            e.getMessage());
        }

        return keyStoresRootNode;
    }

    public void unmapKeyStore(KeyStoreNode keyStoreNode)
    {
        keyStoresRootNode.removeKeyStore(keyStoreNode);
        try
        {
            File file = keyStoreNode.getFile();
            PasswordProvider passwordProvider = new PasswordProvider(file);
            passwordProvider.deleteKeyStoreSavedPasswordNode();
            KeyStoreManager.getInstance().removeKeyStore(keyStoreNode);
        }
        catch (KeyStoreManagerException e)
        {
            EclipseUtils.showErrorDialog("Error unmapping KeyStore", NLS.bind(
                    "Could not unmap the keystore file {0}", keyStoreNode.getFile()), new Status(
                    IStatus.ERROR, "Error unmapping KeyStore",
                    CertificateManagerActivator.PLUGIN_ID, e));
        }
    }

    public void mapKeyStore(KeyStoreNode keyStoreNode) throws KeyStoreManagerException
    {
        keyStoresRootNode.addKeyStoreNode(keyStoreNode);
        KeyStoreManager.getInstance().addKeyStore(keyStoreNode);
    }

    /**
     * @return the keyStoresRootNode (populated through {@link SigningAndKeysModelManager#getInstance(), in the first access}
     */
    public KeyStoreRootNode getKeyStoresRootNode()
    {
        return keyStoresRootNode;
    }
}