64 lines
1.9 KiB
Java
64 lines
1.9 KiB
Java
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//: com/mindviewinc/util/CountingMapData.java
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// <20>2015 MindView LLC: see Copyright.txt
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// Unlimited-length Map containing sample data.
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package com.mindviewinc.util;
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import java.util.*;
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public class CountingMapData
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extends AbstractMap<Integer,String> {
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private int size;
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private static String[] chars =
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"A B C D E F G H I J K L M N O P Q R S T U V W X Y Z"
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.split(" ");
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public CountingMapData(int size) {
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if(size < 0) this.size = 0;
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else this.size = size;
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}
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private static class Entry
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implements Map.Entry<Integer,String> {
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int index;
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Entry(int index) { this.index = index; }
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@Override
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public boolean equals(Object o) {
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return Integer.valueOf(index).equals(o);
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}
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@Override
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public Integer getKey() { return index; }
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@Override
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public String getValue() {
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return
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chars[index % chars.length] +
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Integer.toString(index / chars.length);
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}
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@Override
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public String setValue(String value) {
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throw new UnsupportedOperationException();
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}
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@Override
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public int hashCode() {
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return Integer.valueOf(index).hashCode();
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}
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}
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@Override
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public Set<Map.Entry<Integer,String>> entrySet() {
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// LinkedHashSet retains initialization order:
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Set<Map.Entry<Integer,String>> entries =
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new LinkedHashSet<>();
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for(int i = 0; i < size; i++)
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entries.add(new Entry(i));
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return entries;
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}
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public static void main(String[] args) {
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System.out.println(new CountingMapData(60));
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}
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} /* Output:
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{0=A0, 1=B0, 2=C0, 3=D0, 4=E0, 5=F0, 6=G0, 7=H0, 8=I0,
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9=J0, 10=K0, 11=L0, 12=M0, 13=N0, 14=O0, 15=P0, 16=Q0,
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17=R0, 18=S0, 19=T0, 20=U0, 21=V0, 22=W0, 23=X0, 24=Y0,
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25=Z0, 26=A1, 27=B1, 28=C1, 29=D1, 30=E1, 31=F1, 32=G1,
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33=H1, 34=I1, 35=J1, 36=K1, 37=L1, 38=M1, 39=N1, 40=O1,
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41=P1, 42=Q1, 43=R1, 44=S1, 45=T1, 46=U1, 47=V1, 48=W1,
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49=X1, 50=Y1, 51=Z1, 52=A2, 53=B2, 54=C2, 55=D2, 56=E2,
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57=F2, 58=G2, 59=H2}
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*///:~
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