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/*
* Copyright (C) 2002-2017 Sebastiano Vigna
*
* 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 it.unimi.dsi.fastutil.objects;
import java.util.AbstractCollection;
/** An abstract class providing basic methods for collections implementing a type-specific interface.
*
* In particular, this class provide {@link #iterator()}, add(), {@link #remove(Object)} and
* {@link #contains(Object)} methods that just call the type-specific counterpart.
*
*
Warning: Because of a name clash between the list and collection interfaces
* the type-specific deletion method of a type-specific abstract
* collection is rem(), rather then remove(). A
* subclass must thus override rem(), rather than
* remove(), to make all inherited methods work properly.
*/
public abstract class AbstractReferenceCollection extends AbstractCollection implements ReferenceCollection {
protected AbstractReferenceCollection() {}
/** {@inheritDoc}
*
* This implementation delegates to the new covariantly stronger generic method {@link #iterator()}.
* @deprecated As of fastutil 5, replaced by {@link #iterator()}.
*/
@Deprecated
@Override
public ObjectIterator objectIterator() {
return iterator();
}
@Override
public abstract ObjectIterator iterator();
@Override
public String toString() {
final StringBuilder s = new StringBuilder();
final ObjectIterator i = iterator();
int n = size();
Object k;
boolean first = true;
s.append("{");
while(n-- != 0) {
if (first) first = false;
else s.append(", ");
k = i.next();
if (this == k) s.append("(this collection)"); else
s.append(String.valueOf(k));
}
s.append("}");
return s.toString();
}
}