/*
 * Copyright 2013
 * 
 * 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.openntf.domino.iterators;

import java.util.Iterator;
import java.util.logging.Logger;

import org.openntf.domino.ACL;
import org.openntf.domino.ACLEntry;
import org.openntf.domino.utils.DominoUtils;

// TODO: Auto-generated Javadoc
/**
 * The Class AclIterator.
 */
public class AclIterator implements Iterator<ACLEntry> {

	@SuppressWarnings("unused")
	private static final Logger log_ = Logger.getLogger(AclIterator.class.getName());

	private ACL acl;

	private transient ACLEntry currentEntry_;
	private transient ACLEntry nextEntry_;
	@SuppressWarnings("unused")
	private boolean hasChecked_ = false;

	private boolean started_;

	private boolean done_;

	/**
	 * Instantiates a new acl iterator.
	 * 
	 * @param acl
	 *            the acl
	 */
	public AclIterator(final ACL acl) {
		setAcl(acl);
	}

	private ACLEntry getNext() {
		if (nextEntry_ == null) {
			ACLEntry currentEntry = getCurrentEntry();
			ACL acl = getAcl();
			try {
				if (currentEntry == null) {
					if (isDone()) {
						nextEntry_ = null;
					} else {
						nextEntry_ = acl.getFirstEntry();
					}
				} else {
					nextEntry_ = acl.getNextEntry(currentEntry);
				}
			} catch (Throwable t) {
				DominoUtils.handleException(t);
			}
		}
		return nextEntry_;
	}

	/* (non-Javadoc)
	 * @see java.util.Iterator#hasNext()
	 */
	@Override
	public boolean hasNext() {
		return (getNext() != null);
	}

	/* (non-Javadoc)
	 * @see java.util.Iterator#next()
	 */
	@Override
	public ACLEntry next() {
		ACLEntry result = null;
		result = getNext();
		setCurrentEntry(result);
		nextEntry_ = null;
		if (result == null)
			done_ = true;
		return result;
	}

	/* (non-Javadoc)
	 * @see java.util.Iterator#remove()
	 */
	@Override
	public void remove() {
		// NOOP
	}

	/**
	 * Gets the current entry.
	 * 
	 * @return the current entry
	 */
	public ACLEntry getCurrentEntry() {
		return currentEntry_;
	}

	/**
	 * Sets the current entry.
	 * 
	 * @param currentEntry
	 *            the new current entry
	 */
	public void setCurrentEntry(final ACLEntry currentEntry) {
		currentEntry_ = currentEntry;
	}

	/**
	 * Gets the acl.
	 * 
	 * @return the acl
	 */
	public ACL getAcl() {
		return acl;
	}

	/**
	 * Sets the acl.
	 * 
	 * @param acl
	 *            the new acl
	 */
	public void setAcl(final ACL acl) {
		this.acl = acl;
	}

	/**
	 * Checks if is done.
	 * 
	 * @return true, if is done
	 */
	public boolean isDone() {
		return done_;
	}

	/**
	 * Sets the done.
	 * 
	 * @param done
	 *            the new done
	 */
	public void setDone(final boolean done) {
		done_ = done;
	}

	/**
	 * Checks if is started.
	 * 
	 * @return true, if is started
	 */
	public boolean isStarted() {
		return started_;
	}

	/**
	 * Sets the started.
	 * 
	 * @param started
	 *            the new started
	 */
	public void setStarted(final boolean started) {
		started_ = started;
	}
}