/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.codebase;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import org.whole.lang.bindings.IBindingManager;

/**
 * @author Riccardo Solmi
 */
public class StringPersistenceProvider extends AbstractPersistenceProvider {
	private String string;

	public StringPersistenceProvider() {
		this("");
	}
	public StringPersistenceProvider(String string) {
		this(string, null);
	}
	public StringPersistenceProvider(String string, IBindingManager bm) {
		super(bm);
		this.string = string;
	}

	public String getStore() {
		return string;
	}

	public InputStream openInputStream() throws Exception {
		return new ByteArrayInputStream(string.getBytes(getEncoding()));
	}

	public OutputStream openOutputStream() throws Exception {
		return new ByteArrayOutputStream(4096) {
			@Override
			public void close() throws IOException {
				super.close();
				try {
					string = toString(getEncoding());
				} catch (UnsupportedEncodingException e) {
					throw new IOException(e);
				}
			}
		};
	}

	public boolean exists() {
		return true;
	}

	public boolean delete() {
		string = "";
		return false;
	}
}