com.google.testing.pogen.generator.test.java.NameConverter.java Source code

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Here is the source code for com.google.testing.pogen.generator.test.java.NameConverter.java

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// Copyright 2011 The PageObjectGenerator Authors.
// Copyright 2011 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.google.testing.pogen.generator.test.java;

import org.apache.commons.lang3.StringUtils;

import com.google.common.base.Preconditions;
import com.google.common.base.Strings;

/**
 * A utility class to convert various names to adapt for Java naming rule.
 * 
 * @author Kazunori Sakamoto
 */
public class NameConverter {
    /**
     * The character to replace non-suitable characters.
     */
    private static final char REPLACE = '_';

    private NameConverter() {
    }

    /**
     * Converts the specified text with signs to a string without signs by translating signs into
     * texts.
     * 
     * @param textWithSigns
     * @return the specified text with signs to a string without signs by translating signs into texts
     */
    public static String replaceSignsToTexts(String textWithSigns) {
        String[] signs = new String[] { "+", "-", "*", "/", "." };
        String[] texts = new String[] { "_plus_", "_minus_", "_multiply_", "_divide_", "_dot_" };
        return StringUtils.replaceEach(textWithSigns, signs, texts);
    }

    /**
     * Converts the specified file name to a Java class name.
     * 
     * @param fileName the file name to be converted
     * @return the Java class name converted from the specified file name
     */
    public static String getJavaClassName(String fileName) {
        Preconditions.checkArgument(!Strings.isNullOrEmpty(fileName));

        StringBuilder result = new StringBuilder();
        String[] strings = getJavaIdentifier(fileName).split("" + REPLACE);
        for (String string : strings) {
            result.append(StringUtils.capitalize(string));
        }
        return result.toString();
    }

    /**
     * Converts the specified string to a proper Java identifier.
     * 
     * @param str the string to be converted
     * @return the Java identifier converted from the specified string
     */
    public static String getJavaIdentifier(String str) {
        Preconditions.checkArgument(!Strings.isNullOrEmpty(str));

        StringBuilder result = new StringBuilder();
        char ch = str.charAt(0);
        result.append(Character.isJavaIdentifierStart(ch) ? ch : REPLACE);

        for (int i = 1; i < str.length(); i++) {
            ch = str.charAt(i);
            result.append(Character.isJavaIdentifierPart(ch) ? ch : REPLACE);
        }
        return result.toString();
    }
}