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A general and simple library for Android
There is a newer version: 1.10.1
/*
 * Copyright (C) 2016 HaiYang Li
 *
 * 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.landawn.abacus.util;

import java.util.AbstractCollection;
import java.util.Collection;
import java.util.Iterator;
import java.util.function.Predicate;

import com.landawn.abacus.util.stream.Stream;

/**
 * 
 * @since 0.8
 * 
 * @author Haiyang Li
 */
abstract class ImmutableCollection extends AbstractCollection {
    final Collection coll;

    protected ImmutableCollection(Collection c) {
        this.coll = (Collection) c;
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final boolean add(E e) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final boolean addAll(Collection newElements) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final boolean remove(Object object) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public boolean removeIf(Predicate filter) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final boolean removeAll(Collection oldElements) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final boolean retainAll(Collection elementsToKeep) {
        throw new UnsupportedOperationException();
    }

    /**
     * @deprecated Unsupported operation.
     */
    @Deprecated
    @Override
    public final void clear() {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean contains(Object o) {
        return coll.contains(o);
    }

    @Override
    public Iterator iterator() {
        return coll.iterator();
    }

    @Override
    public int size() {
        return coll.size();
    }

    @Override
    public Object[] toArray() {
        return coll.toArray();
    }

    @Override
    public  T[] toArray(T[] a) {
        return coll.toArray(a);
    }

    public Stream streamm() {
        return Stream.of(coll);
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof ImmutableCollection && ((ImmutableCollection) obj).coll.equals(coll);
    }

    @Override
    public int hashCode() {
        return coll.hashCode();
    }

    @Override
    public String toString() {
        return coll.toString();
    }
}