com.torchmind.upm.bundle.BasicResource.java Source code

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Here is the source code for com.torchmind.upm.bundle.BasicResource.java

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/*
 * Copyright 2016 Johannes Donath <johannesd@torchmind.com>
 * and other copyright owners as documented in the project's IP log.
 *
 * 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 com.torchmind.upm.bundle;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.jar.JarArchiveInputStream;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
import org.apache.commons.compress.compressors.xz.XZCompressorInputStream;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;

/**
 * <strong>Basic Resource</strong>
 *
 * Provides a simple implementation of Resource which can be de-serialized using Jackson.
 *
 * @author <a href="mailto:johannesd@torchmind.com">Johannes Donath</a>
 */
public class BasicResource implements Resource {
    private final String name;
    private final String outputDirectory;
    private final ResourceType type;
    private final URI uri;

    @JsonCreator
    public BasicResource(@Nonnull @JsonProperty(value = "name", required = true) String name,
            @Nullable @JsonProperty("outputDirectory") String outputDirectory,
            @Nonnull @JsonProperty(value = "type", required = true) ResourceType type,
            @Nonnull @JsonProperty(value = "uri", required = true) URI uri) {
        this.name = name;
        this.outputDirectory = outputDirectory;
        this.type = type;
        this.uri = uri;
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public ArchiveInputStream createArchiveInputStream() throws IllegalStateException, IOException {
        switch (this.type) {
        case RAW:
            throw new IllegalStateException("Cannot convert RAW resource into archive");
        case JAR:
            return new JarArchiveInputStream(this.createInputStream());
        case TAR_ARCHIVE:
            return new TarArchiveInputStream(this.createInputStream());
        case TAR_GZ_ARCHIVE:
            return new TarArchiveInputStream(new GzipCompressorInputStream(this.createInputStream()));
        case TAR_XZ_ARCHIVE:
            return new TarArchiveInputStream(new XZCompressorInputStream(this.createInputStream()));
        case ZIP_ARCHIVE:
            return new ZipArchiveInputStream(this.createInputStream());
        }

        throw new UnsupportedOperationException("No such resource type: " + this.type);
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public InputStream createInputStream() {
        throw new UnsupportedOperationException("Cannot resolve resource");
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public String getName() {
        return this.name;
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public String getOutputDirectory() {
        return this.outputDirectory;
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public ResourceType getType() {
        return this.type;
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public URI getURI() {
        return this.uri;
    }
}