StringHelpers.java

/*******************************************************************************
 * Copyright (c) 2009 Ordina and committers to Mod4j
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Jos Warmer & Anneke Kleppe - initial implementation taken from Octopus
 *     Ordina - initial implementation
 *******************************************************************************/
package org.eclipselabs.spray.generator.graphiti.util;

/**
 * @author anneke
 * @version $Id: StringHelpers.java,v 1.1 2010/12/02 13:30:23 jos Exp $
 */
public class StringHelpers {

    private StringHelpers() {
    }

    final static public String newLine     = System.getProperty("line.separator", "\n");

    final static public char   newLineChar = newLine.charAt(0);

    static public StringBuffer replaceAllSubstrings(StringBuffer orig, String origSub, String newSub) {
        StringBuffer result = new StringBuffer();
        result.append(replaceAllSubstrings(orig.toString(), origSub, newSub));
        return result;
    }

    static public String replaceAllSubstrings(String orig, String origSub, String newSub) {
        int first = orig.indexOf(origSub);
        if (first == -1) {
            return orig;
        }
        int last = first + origSub.length();
        String result = orig.substring(0, first);
        String rest = orig.substring(last);
        result = result + newSub + replaceAllSubstrings(rest, origSub, newSub);
        return result;
    }

    /**
     * replaces 'origSub' with 'newSub' in the String 'orig'.
     * 
     * @param orig
     * @param origSub
     * @param newSub
     * @return String
     */
    static public String replaceFirstSubstring(String orig, String origSub, String newSub) {
        int first = orig.indexOf(origSub);
        if (first == -1) {
            return orig;
        }
        int last = first + origSub.length();
        String result = orig.substring(0, first);
        result = result + newSub + orig.substring(last);
        return result;
    }

    static public String firstCharToUpper(String orig) {
        String result = "";
        String origFirst = orig.substring(0, 1);
        result = origFirst.toUpperCase();
        result = result + orig.substring(1, orig.length());
        return result;
    }

    static public String firstCharToLower(String orig) {
        String result = "";
        String origFirst = orig.substring(0, 1);
        result = origFirst.toLowerCase();
        result = result + orig.substring(1, orig.length());
        return result;
    }

    static public String indent(String in, int level) {
        StringBuffer result = new StringBuffer();
        String newIndent = "";
        for (int i = 0; i < level; i++) {
            newIndent = newIndent + "\t";
        }
        String temp = in.toString();
        temp = temp.trim(); // remove all whitespace from begin and end
        temp = newIndent + StringHelpers.replaceAllSubstrings(temp, "\n", "\n" + newIndent);
        result.append(temp);
        if (result.charAt(result.length() - 1) == '\t') {
            result.deleteCharAt(result.length() - 1);
        }
        return result.toString();
    }

    static public StringBuffer indent(StringBuffer in, int level) {
        StringBuffer result = new StringBuffer();
        String newIndent = "";
        for (int i = 0; i < level; i++) {
            newIndent = newIndent + "\t";
        }
        String temp = in.toString();
        temp = temp.trim(); // remove all whitespace from begin and end
        temp = newIndent + StringHelpers.replaceAllSubstrings(temp, "\n", "\n" + newIndent);
        result.append(temp);
        if (result.charAt(result.length() - 1) == '\t') {
            result.deleteCharAt(result.length() - 1);
        }
        return result;
    }

    public static String replaceLastSubstring(String orig, String origSub, String newSub) {
        int first = orig.lastIndexOf(origSub);
        if (first == -1) {
            return orig;
        }
        int last = first + origSub.length();
        String result = orig.substring(0, first);
        result = result + newSub + orig.substring(last);
        return result;
    }

    /**
     * @param innerBody
     */
    public static void trimTrailingWhiteSpace(StringBuffer innerBody) {
        while (Character.isWhitespace(innerBody.charAt(innerBody.length() - 1))) {
            innerBody.deleteCharAt(innerBody.length() - 1);
        }

    }

    /**
     * Add brackets ( '(' and ')' ) around <code>source</code> when it contains any white space characters.
     * 
     * @param source
     * @return
     */
    static public String addBrackets(String source) {
        String temp = source;
        temp = temp.trim(); // remove all whitespace from begin and end
        if (temp.charAt(0) == '(' && temp.charAt(temp.length() - 1) == ')') {
            return source;
        } else if (source.indexOf(' ') != -1) { // string contains a space character
            source = "(" + source + ")";
        }
        return source;
    }

    /**
     * @param toBeCalled
     * @return
     */
    public static String removeSurroundingQuotes(String source) {
        if (source.charAt(0) == '\'' || source.charAt(0) == '\"') { // string starts with a quote character
            source = source.substring(1, source.length());
            if (source.charAt(source.length() - 1) == '\'' || source.charAt(source.length() - 1) == '\"') { // string
                // ends with
                // a quote
                // character
                source = source.substring(0, source.length() - 1);
            }
        }
        return source;
    }

}