/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.apache.harmony.javax.security.auth.callback;

import java.io.Serializable;

import javax.security.auth.callback.Callback;

import org.apache.harmony.auth.internal.nls.Messages;

public class ChoiceCallback implements Callback, Serializable {

	private static final long serialVersionUID = -3975664071579892167L;

	private int defaultChoice;

	private String prompt;

	private final boolean multipleSelectionsAllowed;

	private String[] choices;

	private int[] selections;

	public ChoiceCallback(String prompt, String[] choices, int defaultChoice,
			boolean multipleSelectionsAllowed) {
		super();
		setPrompt(prompt);
		setChoices(choices);
		setDefaultChoice(defaultChoice);
		this.multipleSelectionsAllowed = multipleSelectionsAllowed;
	}

	public boolean allowMultipleSelections() {
		return multipleSelectionsAllowed;
	}

	public String[] getChoices() {
		return choices;
	}

	public int getDefaultChoice() {
		return defaultChoice;
	}

	public String getPrompt() {
		return prompt;
	}

	public int[] getSelectedIndexes() {
		return selections;
	}

	private void setChoices(String[] choices) {
		if (choices == null || choices.length == 0) {
			throw new IllegalArgumentException(Messages.getString("auth.1C")); //$NON-NLS-1$
		}
		for (final String choice : choices) {
			if (choice == null || choice.length() == 0) {
				throw new IllegalArgumentException(
						Messages.getString("auth.1C")); //$NON-NLS-1$
			}
		}
		// FIXME: System.arraycopy(choices, 0 , new String[choices.length], 0,
		// choices.length);
		this.choices = choices;

	}

	private void setDefaultChoice(int defaultChoice) {
		if (0 > defaultChoice || defaultChoice >= choices.length) {
			throw new IllegalArgumentException(Messages.getString("auth.1D")); //$NON-NLS-1$
		}
		this.defaultChoice = defaultChoice;
	}

	private void setPrompt(String prompt) {
		if (prompt == null || prompt.length() == 0) {
			throw new IllegalArgumentException(Messages.getString("auth.14")); //$NON-NLS-1$
		}
		this.prompt = prompt;
	}

	public void setSelectedIndex(int selection) {
		selections = new int[1];
		selections[0] = selection;
	}

	public void setSelectedIndexes(int[] selections) {
		if (!multipleSelectionsAllowed) {
			throw new UnsupportedOperationException();
		}
		this.selections = selections;
		// FIXME:
		// this.selections = new int[selections.length]
		// System.arraycopy(selections, 0, this.selections, 0,
		// this.selections.length);
	}
}