/*
 * 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.jackrabbit.vault.fs.api;

import java.io.InputStream;
import java.io.Reader;

import org.xml.sax.InputSource;

/**
 * Extends the {@link InputSource} by a content length and last modified.
 *
 */
public abstract class VaultInputSource extends InputSource {

    protected VaultInputSource() {}

    protected VaultInputSource(String systemId) {
        super(systemId);
    }

    protected VaultInputSource(InputStream byteStream) {
        super(byteStream);
    }

    protected VaultInputSource(Reader characterStream) {
        super(characterStream);
    }

    /**
     * Returns the content length of the underlying file.
     * @return the content length of the underlying file or -1 if unknown.
     */
    public abstract long getContentLength();

    /**
     * Returns the last modified date of the underlying file.
     * @return the last modified date of the underlying file or 0 if unknown.
     */
    public abstract long getLastModified();
}
