append With Spaces - Android java.lang

Android examples for java.lang:StringBuilder

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Description

append With Spaces

Demo Code

/*/*from w  ww .  j a  v a  2s  .c  o  m*/
 * Copyright (C) 2012 Google Inc.
 *
 * 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.googlecode.eyesfree.brailleback.utils;

import android.text.Editable;

/**
 * Utilities for {@link String}s and other {@link CharSequence}s.
 */
public class StringUtils {
    private static final char SPACE = ' ';

    public static Editable appendWithSpaces(Editable editable,
            Object... args) {
        for (Object arg : args) {
            if (arg == null) {
                continue;
            }
            if (editable.length() > 0 && !endsWithSpace(editable)) {
                editable.append(SPACE);
            }
            if (arg instanceof CharSequence) {
                editable.append((CharSequence) arg);
            } else {
                editable.append(String.valueOf(arg));
            }
        }
        return editable;
    }

    public static StringBuilder appendWithSpaces(StringBuilder builder,
            Object... args) {
        for (Object arg : args) {
            if (arg == null) {
                continue;
            }
            if (builder.length() > 0 && !endsWithSpace(builder)) {
                builder.append(SPACE);
            }
            builder.append(arg);
        }
        return builder;
    }

    /**
     * Returns [@code true} if the last code point of {@code seq} is
     * a space character.
     */
    public static boolean endsWithSpace(CharSequence seq) {
        if (seq.length() == 0) {
            return false;
        }
        return Character.isSpaceChar(Character.codePointBefore(seq,
                seq.length()));
    }

    private StringUtils() {
    }
}

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