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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 org.wildfly.security.authz;

import java.util.Iterator;

class AddPrefixRoles implements Roles {
    private final Roles delegate;
    private final String prefix;

    AddPrefixRoles(final Roles delegate, final String prefix) {
        this.delegate = delegate;
        this.prefix = prefix;
    }

    public boolean contains(final String roleName) {
        final String prefix = this.prefix;
        return roleName.startsWith(prefix) && delegate.contains(roleName.substring(prefix.length()));
    }

    public Iterator iterator() {
        final Iterator iterator = delegate.iterator();
        return new Iterator() {
            public boolean hasNext() {
                return iterator.hasNext();
            }

            public String next() {
                return prefix + iterator.next();
            }
        };
    }
}