Android ASCII Check containsOnlyNonCrLfPrintableAscii( final String... values)

Description

This is useful when checking the string should be encoded into quoted-printable or not, which is required by vCard 2.1.

License

Open Source License

Declaration

public static boolean containsOnlyNonCrLfPrintableAscii(
        final String... values) 

Method Source Code

//package com.java2s;
/*/*  w w w . jav a2s  .  c o  m*/
 * Copyright (C) 2009 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.
 */

import android.text.TextUtils;

import java.util.Arrays;
import java.util.Collection;

public class Main {
    /**
     * <p>
     * This is useful when checking the string should be encoded into quoted-printable or not, which is required by vCard 2.1.
     * </p>
     * <p>
     * See the definition of "7bit" in vCard 2.1 spec for more information.
     * </p>
     */
    public static boolean containsOnlyNonCrLfPrintableAscii(
            final String... values) {
        if (values == null) {
            return true;
        }
        return containsOnlyNonCrLfPrintableAscii(Arrays.asList(values));
    }

    public static boolean containsOnlyNonCrLfPrintableAscii(
            final Collection<String> values) {
        if (values == null) {
            return true;
        }
        final int asciiFirst = 0x20;
        final int asciiLast = 0x7E; // included
        for (final String value : values) {
            if (TextUtils.isEmpty(value)) {
                continue;
            }
            final int length = value.length();
            for (int i = 0; i < length; i = value.offsetByCodePoints(i, 1)) {
                final int c = value.codePointAt(i);
                if (!(asciiFirst <= c && c <= asciiLast)) {
                    return false;
                }
            }
        }
        return true;
    }
}

Related

1. containsOnlyNonCrLfPrintableAscii(String s)
2. containsOnlyPrintableAscii(String s)
3. isPureAscii(String v)
4. containsOnlyNonCrLfPrintableAscii( final Collection values)
5. checkAscii(char c)
6. isPrintableAscii(int c)