Java List Search searchReplace(String key, String value, List lines)

Description

search Replace

License

Apache License

Declaration

public static boolean searchReplace(String key, String value, List<String> lines) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.List;

public class Main {
    public static boolean searchReplace(String key, String value, List<String> lines) {
        return searchReplace(key, value, lines, false);
    }//w  w  w .j a v  a  2  s  .c  o m

    public static boolean searchReplace(String key, String value, List<String> lines, boolean all) {
        boolean rs = false;
        for (int i = 0; i < lines.size(); i++) {
            String line = lines.get(i);
            if (cnfKeyOccursUnComment(key, line) || cnfKeyOccursCommented(key, line)) {
                lines.set(i, key + " = " + value);
                rs = true;
                if (!all) {
                    break;
                }
            }
        }
        return rs;
    }

    public static boolean cnfKeyOccursUnComment(String key, String line) {
        return cnfKeyOccurs(key, line, 0);
    }

    public static boolean cnfKeyOccursCommented(String key, String line) {
        String ln = line.trim();
        if (ln.length() == 0) {
            return false;
        }
        if (ln.charAt(0) == '#') {
            int idx = -1;
            for (int i = 1; i < ln.length(); i++) {
                if (ln.charAt(i) != ' ') {
                    idx = i;
                    break;
                }
            }
            if (idx > 0) {
                return cnfKeyOccurs(key, ln, idx);
            }
        }
        return false;
    }

    private static boolean cnfKeyOccurs(String key, String line, int startIdx) {
        String ln = line.trim();
        if (ln.length() == 0) {
            return false;
        }
        if (ln.startsWith(key, startIdx)) {
            // next character must be whitespace or =
            // #abc.def  =
            // i = 8
            for (int i = startIdx + key.length(); i < ln.length(); i++) {
                char c = ln.charAt(i);
                if (c == ' ') {
                    continue;
                }
                if (c == '=') {
                    return true;
                }
            }
        }
        return false;
    }
}

Related

1. search(List> collection, T element)
2. search(String[] searchList, String s)