Android Open Source - DKO Util

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Back to project page DKO.

License

The source code is released under:

GNU Lesser General Public License

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Java Source Code

package org.kered.dko.ant;
/*  w  w  w .  j a  v  a  2s. co m*/
import java.util.Collection;

class Util {

  static String join(final String s, final Collection<?> c) {
      final StringBuilder sb = new StringBuilder();
      for (final Object o : c) {
        sb.append(o);
        sb.append(s);
      }
      if (c != null && c.size() > 0) {
        sb.delete(sb.length()-s.length(), sb.length());
      }
      return sb.toString();
  }

  static <T extends Object> String join(final String s, final T... c) {
    if(c==null || c.length==0) return "";
      final StringBuilder sb = new StringBuilder();
      for (final Object o : c) {
        sb.append(o==null ? "" : o.toString());
        sb.append(s);
      }
      return sb.delete(sb.length()-s.length(), sb.length()).toString();
  }

  static boolean truthy(String s) {
    if (s == null) return false;
    s = s.trim().toLowerCase();
    if ("true".equals(s)) return true;
    if ("false".equals(s)) return false;
    if ("t".equals(s)) return true;
    if ("f".equals(s)) return false;
    if ("yes".equals(s)) return true;
    if ("no".equals(s)) return false;
    if ("y".equals(s)) return true;
    if ("n".equals(s)) return false;
    try { return Integer.valueOf(s) != 0; }
    catch (final NumberFormatException e) { /* ignore */ }
    throw new RuntimeException("I don't know the truthiness of '"+ s
        +"'.  Accepted values are: true/false/t/f/yes/no/y/n/[0-9]+");
  }

  static String underscoreToCamelCase(String s, final boolean capitalizeFirstChar) {
    if (s==null) return null;
    if (s.length()==0) return s;
    s = s.toLowerCase();
    s = s.replace(' ', '_').replace("%", "_PERCENT");
    final char[] c = s.toCharArray();
    if (capitalizeFirstChar) {
      c[0] = Character.toUpperCase(c[0]);
    }
    for (int i=1; i<c.length; ++i) {
      if (c[i-1]=='_') {
        c[i] = Character.toUpperCase(c[i]);
      }
    }
    String ret = new String(c).replaceAll("_", "");
    if (c[0]=='_') return "_"+ret;
    else return ret;
  }

  static String underscoreToCamelCase(final Collection<String> strings, boolean capitalizeFirstChar) {
      final StringBuffer sb = new StringBuffer();
      for (final String s : strings) {
    sb.append(underscoreToCamelCase(s, capitalizeFirstChar));
    capitalizeFirstChar = true;
      }
      return sb.toString();
  }

  static String splitCamelCase(final String s) {
    return s.replaceAll(
        String.format("%s|%s|%s",
            "(?<=[A-Z])(?=[A-Z][a-z])",
            "(?<=[^A-Z])(?=[A-Z])",
            "(?<=[A-Za-z])(?=[^A-Za-z])"
            ),
            " "
        );
  }

}

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