dcaedt_catalog/commons/src/main/java/org/onap/sdc/dcae/catalog/commons/ListBuilder.java

   1 package org.onap.sdc.dcae.catalog.commons;
   2
   3 import java.util.Arrays;
   4 import java.util.List;
   5
   6 import org.onap.sdc.dcae.catalog.commons.ListBuilder;
   7
   8 import java.util.LinkedList;
   9
  10 public class ListBuilder<T> {
  11
  12         private List<T> list;
  13
  14         public ListBuilder() {
  15                 this.list = new LinkedList<T>();
  16         }
  17
  18         public boolean isEmpty() {
  19                 return this.list.isEmpty();
  20         }
  21
  22         public ListBuilder add(T theValue) {
  23                 this.list.add(theValue);
  24                 return this;
  25         }
  26
  27         public ListBuilder addAll(final Iterable<? extends T> theValues) {
  28                 for (final T val : theValues) {
  29                         this.list.add(val);
  30                 }
  31                 return this;
  32         }
  33
  34         public ListBuilder addAll(final List<? extends T> theList) {
  35                 this.list.addAll(theList);
  36                 return this;
  37         }
  38
  39         public ListBuilder addAll(final T[] theArray) {
  40                 for (T t: theArray) this.list.add(t);
  41                 return this;
  42         }
  43
  44         public List build() {
  45                 return this.list;
  46         }
  47
  48         public List buildOpt() {
  49                 return this.list.isEmpty() ? null : this.list;
  50         }
  51
  52         public static <V> List<V> asList(V[] theArray) {
  53                 return Arrays.asList(theArray);
  54         }
  55
  56         public static <V> List<V> asListOpt(V[] theArray) {
  57                 return (theArray != null && theArray.length > 0) ? Arrays.asList(theArray) : null;
  58         }
  59 }