org.usergrid.utils.StringUtils.java Source code

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Here is the source code for org.usergrid.utils.StringUtils.java

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/*******************************************************************************
 * Copyright 2012 Apigee Corporation
 * 
 * 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 org.usergrid.utils;

import static org.usergrid.utils.ConversionUtils.string;

import java.util.Arrays;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author edanuff
 * 
 */
public class StringUtils extends org.apache.commons.lang.StringUtils {

    private static final Logger logger = LoggerFactory.getLogger(StringUtils.class);

    public static String[] lowerCaseArray(String[] strings) {
        if (strings != null) {
            for (int i = 0; i < strings.length; i++) {
                strings[i] = strings[i].toLowerCase();
            }
        }
        return strings;
    }

    public static String capitalizeDelimiter(String str, char... delims) {
        if (str == null) {
            return null;
        }
        StringBuilder builder = new StringBuilder(str.length());
        boolean cap_next = true;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (cap_next) {
                c = Character.toUpperCase(c);
            } else {
                c = Character.toLowerCase(c);
            }
            builder.append(c);
            cap_next = false;
            for (char delim : delims) {
                if (c == delim) {
                    cap_next = true;
                    break;
                }
            }
        }
        return builder.toString();
    }

    /**
     * @param str
     * @return
     */
    public static String capitalizeUnderscore(String str) {
        if (str == null) {
            return null;
        }
        return capitalizeDelimiter(str, '_');
    }

    /**
     * @param obj
     * @return
     */
    public static Object lower(Object obj) {
        if (!(obj instanceof String)) {
            return obj;
        }
        return ((String) obj).toLowerCase();
    }

    public static String stringOrSubstringAfterLast(String str, char c) {
        if (str == null) {
            return null;
        }
        int i = str.lastIndexOf(c);
        if (i != -1) {
            return str.substring(i + 1);
        }
        return str;
    }

    public static String stringOrSubstringBeforeLast(String str, char c) {
        if (str == null) {
            return null;
        }
        int i = str.lastIndexOf(c);
        if (i != -1) {
            return str.substring(0, i);
        }
        return str;
    }

    public static String stringOrSubstringBeforeFirst(String str, char c) {
        if (str == null) {
            return null;
        }
        int i = str.indexOf(c);
        if (i != -1) {
            return str.substring(0, i);
        }
        return str;
    }

    public static String stringOrSubstringAfterFirst(String str, char c) {
        if (str == null) {
            return null;
        }
        int i = str.indexOf(c);
        if (i != -1) {
            return str.substring(i + 1);
        }
        return str;
    }

    public static String compactWhitespace(String str) {
        if (str == null) {
            return null;
        }
        boolean prev_ws = false;
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (Character.isWhitespace(c)) {
                if (!prev_ws) {
                    builder.append(' ');
                }
                prev_ws = true;
            } else {
                prev_ws = false;
                builder.append(c);
            }
        }
        return builder.toString().trim();
    }

    /**
     * @param source
     * @param find
     * @param replace
     * @return new string with replace applied
     */
    public static String replaceAll(String source, String find, String replace) {
        if (source == null) {
            return null;
        }
        while (true) {
            String old = source;
            source = source.replaceAll(find, replace);
            if (source.equals(old)) {
                return source;
            }
        }
    }

    /**
     * @param obj
     * @return
     */
    public static String toString(Object obj) {
        return string(obj);
    }

    public static String toStringFormat(Object obj, String format) {
        if (obj != null) {
            if (format != null) {
                if (obj.getClass().isArray()) {
                    return String.format(format, Arrays.toString((Object[]) obj));
                }
                return String.format(format, string(obj));
            } else {
                return string(obj);
            }
        }
        return "";
    }

    /**
     * @param obj
     * @return
     */
    public static String ifString(Object obj) {
        if (obj instanceof String) {
            return (String) obj;
        }
        return null;
    }

    /**
     * @param obj
     * @return
     */
    public static Object toLowerIfString(Object obj) {
        if (obj instanceof String) {
            return ((String) obj).toLowerCase();
        }
        return obj;
    }

    /**
     * @param obj
     * @return
     */
    public static boolean isString(Object obj) {
        return obj instanceof String;
    }

    /**
     * @param obj
     * @return
     */
    public static boolean isStringOrNull(Object obj) {
        if (obj == null) {
            return true;
        }
        return obj instanceof String;
    }

    public static String readClasspathFileAsString(String filePath) {
        try {
            return IOUtils.toString(StringUtils.class.getResourceAsStream(filePath));
        } catch (Exception e) {
            logger.error("Error getting file from classpath: " + filePath, e);
        }
        return null;
    }

}