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1
24 package org.objectweb.jalisto.se.impl.server.page.info;
25
26 import org.objectweb.jalisto.se.impl.InFileAddress;
27
28 import java.io.Serializable  ;
29 import java.util.Iterator ;
30 import java.util.LinkedList ;
31
32 public class PageInfo implements Serializable {
33 public PageInfo(short pageSize, short pageType) {
34 this.freePlaces = new LinkedList ();
35 this.size = pageSize;
36 this.pageType = pageType;
37
38 for (int i = 0; i < size; i++) {
39 freePlaces.addLast(new Integer (i));
40 }
41 }
42
43 public short getPageType() {
44 return pageType;
45 }
46
47 public Iterator getAllFreePlace() {
48 return freePlaces.iterator();
49 }
50
51 public boolean isEmpty() {
52 return (freePlaces.size() == size);
53 }
54
55 public int getEmptySpace() {
56 return freePlaces.size();
57 }
58
59 public Integer getAFreePlace() {
60 Integer result = (Integer ) freePlaces.getFirst();
61 freePlaces.removeFirst();
62 return result;
63 }
64
65 public void allocateFreeSpaceAt(Integer index) {
66 freePlaces.addLast(index);
67 }
68
69 public boolean hasFreeSpaceAt(Integer index) {
70 return freePlaces.contains(index);
71 }
72
73 public void noMorefreeSpaceAt(Integer index) {
74 freePlaces.remove(index);
75 }
76
77 public void setPageIfa(InFileAddress pageIfa) {
78 this.pageIfa = pageIfa;
79 }
80
81 public InFileAddress getPageIfa() {
82 return pageIfa.getClone();
83 }
84
85 public void setPid(Object pid) {
86 this.pid = pid;
87 }
88
89 public Object getPid() {
90 return pid;
91 }
92
93 public PageInfo getClone() {
94 PageInfo clone = new PageInfo(size, pageType);
95 clone.pageIfa = pageIfa.getClone();
96 clone.freePlaces = new LinkedList (freePlaces);
97 clone.pid = pid;
98 return clone;
99 }
100
101 public String toString() {
102 StringBuffer sb = new StringBuffer ();
103 sb.append("PageInfo:").append(pid).append(':').append(pageIfa)
104 .append(':').append(getEmptySpace());
105
106 return sb.toString();
107 }
108
109
110 private InFileAddress pageIfa;
111 private LinkedList freePlaces;
112 private Object pid;
113 private short size;
114 private short pageType;
115
116
117 static final long serialVersionUID = -7589377097964761459L;
118 }
119 |
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