org.codehaus.plexus.components.io.resources.PlexusIoURLResource Maven / Gradle / Ivy

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package org.codehaus.plexus.components.io.resources;

/*
 * Copyright 2007 The Codehaus Foundation.
 *
 * 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.
 */

import javax.annotation.Nonnull;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public abstract class PlexusIoURLResource extends AbstractPlexusIoResource {
    protected PlexusIoURLResource(
            @Nonnull String name,
            long lastModified,
            long size,
            boolean isFile,
            boolean isDirectory,
            boolean isExisting) {
        super(name, lastModified, size, isFile, isDirectory, isExisting);
    }

    @Nonnull
    public InputStream getContents() throws IOException {
        final URL url = getURL();
        try {
            URLConnection uc = url.openConnection();
            uc.setUseCaches(false);
            return uc.getInputStream();
        } catch (IOException e) {
            throw new IOException(getDescriptionForError(url), e);
        }
    }

    public String getDescriptionForError(URL url) {
        return url != null ? url.toExternalForm() : "url=null";
    }

    public abstract URL getURL() throws IOException;
}