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1
46 package groovy.lang;
47
48 import java.util.AbstractList  ;
49 import java.util.List ;
50
51 import org.codehaus.groovy.runtime.InvokerHelper;
52
53
60 public class Tuple extends AbstractList {
61
62 private Object [] contents;
63 private int hashCode;
64
65 public Tuple(Object [] contents) {
66 this.contents = contents;
67 }
68
69 public Object get(int index) {
70 return contents[index];
71 }
72
73 public int size() {
74 return contents.length;
75 }
76
77 public boolean equals(Object that) {
78 if (that instanceof Tuple) {
79 return equals((Tuple) that);
80 }
81 return false;
82 }
83
84 public boolean equals(Tuple that) {
85 if (contents.length == that.contents.length) {
86 for (int i = 0; i < contents.length; i++) {
87 if (! InvokerHelper.compareEqual(this.contents[i], that.contents[i])) {
88 return false;
89 }
90 }
91 return true;
92 }
93 return false;
94 }
95
96
97 public int hashCode() {
98 if (hashCode == 0) {
99 for (int i = 0; i < contents.length; i++ ) {
100 Object value = contents[i];
101 int hash = (value != null) ? value.hashCode() : 0xbabe;
102 hashCode ^= hash;
103 }
104 if (hashCode == 0) {
105 hashCode = 0xbabe;
106 }
107 }
108 return hashCode;
109 }
110
111 public List subList(int fromIndex, int toIndex) {
112 int size = toIndex - fromIndex;
113 Object [] newContent = new Object [size];
114 System.arraycopy(contents, fromIndex, newContent, 0, size);
115 return new Tuple(newContent);
116 }
117 }
118 |
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