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/*
* Copyright (C) 2010 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.mongodb.util;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;
public class StringRangeSet implements Set<String> {
private final int size;
private final static int NUMSTR_LEN = 100;
private final static String[] NUMSTRS = new String[100];
static {
for (int i = 0; i < NUMSTR_LEN; ++i)
NUMSTRS[i] = String.valueOf(i);
}
public StringRangeSet(int size) {
this.size = size;
}
public int size() {
return size;
}
public Iterator<String> iterator() {
return new Iterator<String>() {
int index = 0;
public boolean hasNext() {
return index < size;
}
public String next() {
if (index < NUMSTR_LEN)
return NUMSTRS[index++];
return String.valueOf(index++);
}
public void remove() {
throw new UnsupportedOperationException();
}
};
}
public boolean add(String e) {
throw new UnsupportedOperationException();
}
public boolean addAll(Collection<? extends String> c) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean contains(Object o) {
int t = Integer.valueOf(String.valueOf(o));
return t >= 0 && t < size;
}
public boolean containsAll(Collection<?> c) {
for (Object o : c) {
if (!contains(o)) {
return false;
}
}
return true;
}
public boolean isEmpty() {
return false;
}
public boolean remove(Object o) {
throw new UnsupportedOperationException();
}
public boolean removeAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public boolean retainAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public Object[] toArray() {
String[] array = new String[size()];
for (int i = 0; i < size; ++i) {
if (i < NUMSTR_LEN) {
array[i] = NUMSTRS[i];
} else {
array[i] = String.valueOf(i);
}
}
return array;
}
public <T> T[] toArray(T[] a) {
throw new UnsupportedOperationException();
}
}
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