Android Open Source - esr-scanner Ocr Character Helper

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2011 Robert Theis// w w w .  j  a va 2 s  . c  o  m
 *
 * 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 ch.luklanis.esscan;

import android.content.SharedPreferences;

/**
 * Helper class to enable language-specific character blacklists/whitelists.
 */
public class OcrCharacterHelper {
    public static final String KEY_CHARACTER_BLACKLIST_PAYMENT_SLIP = "preference_character_blacklist_payment_slip";

    public static final String KEY_CHARACTER_WHITELIST_PAYMENT_SLIP = "preference_character_whitelist_payment_slip";

    private OcrCharacterHelper() {
    } // Private constructor to enforce noninstantiability

    public static String getDefaultBlacklist(String languageCode) {
        if (languageCode.equals("deu")) {
            return "";
        } // Payment slip
        else {
            throw new IllegalArgumentException();
        }
    }

    public static String getDefaultWhitelist(String languageCode) {
        if (languageCode.equals("eng")) {
            return "!?@#$%()<>_-+=/.,:;'\"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        } // English
        else if (languageCode.equals("deu")) {
            return ">+0123456789";
        } // Payment slip
        else {
            throw new IllegalArgumentException();
        }
    }

    public static String getBlacklist(SharedPreferences prefs, String languageCode) {
        if (languageCode.equals("deu")) {
            return prefs.getString(KEY_CHARACTER_BLACKLIST_PAYMENT_SLIP,
                    getDefaultBlacklist(languageCode));
        } else {
            throw new IllegalArgumentException();
        }
    }

    public static String getWhitelist(SharedPreferences prefs, String languageCode) {
        if (languageCode.equals("deu")) {
            return prefs.getString(KEY_CHARACTER_WHITELIST_PAYMENT_SLIP,
                    getDefaultWhitelist(languageCode));
        } else {
            throw new IllegalArgumentException();
        }
    }

    public static void setBlacklist(SharedPreferences prefs, String languageCode,
                                    String blacklist) {
        if (languageCode.equals("deu")) {
            prefs.edit().putString(KEY_CHARACTER_BLACKLIST_PAYMENT_SLIP, blacklist).commit();
        } else {
            throw new IllegalArgumentException();
        }
    }

    public static void setWhitelist(SharedPreferences prefs, String languageCode,
                                    String whitelist) {
        if (languageCode.equals("deu")) {
            prefs.edit().putString(KEY_CHARACTER_WHITELIST_PAYMENT_SLIP, whitelist).commit();
        } else {
            throw new IllegalArgumentException();
        }
    }
}

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