/* * Copyright (C) 2008 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.numix.calculator; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import android.content.Context; import com.numix.calculator.BaseModule.Mode; class Persist { private static final int LAST_VERSION = 3; private static final String FILE_NAME = "calculator.data"; private final Context mContext; History mHistory = new History(); private int mDeleteMode; private Mode mMode; Persist(Context context) { this.mContext = context; } public void setDeleteMode(int mode) { mDeleteMode = mode; } public int getDeleteMode() { return mDeleteMode; } public void setMode(Mode mode) { this.mMode = mode; } public Mode getMode() { return mMode; } public void load() { try { InputStream is = new BufferedInputStream(mContext.openFileInput(FILE_NAME), 8192); DataInputStream in = new DataInputStream(is); int version = in.readInt(); if(version > LAST_VERSION) { throw new IOException("data version " + version + "; expected " + LAST_VERSION); } if(version > 1) { mDeleteMode = in.readInt(); } if(version > 2) { int quickSerializable = in.readInt(); for(Mode m : Mode.values()) { if(m.getQuickSerializable() == quickSerializable) this.mMode = m; } } mHistory = new History(version, in); in.close(); } catch(FileNotFoundException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } } public void save() { try { OutputStream os = new BufferedOutputStream(mContext.openFileOutput(FILE_NAME, 0), 8192); DataOutputStream out = new DataOutputStream(os); out.writeInt(LAST_VERSION); out.writeInt(mDeleteMode); out.writeInt(mMode.quickSerializable); mHistory.write(out); out.close(); } catch(IOException e) { e.printStackTrace(); } } }