| /* |
| * 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.sling.distribution.packaging.impl; |
| |
| import javax.annotation.CheckForNull; |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.sling.distribution.packaging.DistributionPackage; |
| |
| /** |
| * A reference package wraps an actual {@link DistributionPackage} providing a reference to it |
| * by its {@link DistributionPackage#getId()}. |
| */ |
| public class ReferencePackage extends AbstractDistributionPackage { |
| static final String REFERENCE_PREFIX = "reference-"; |
| private final DistributionPackage distributionPackage; |
| private final String reference; |
| |
| public ReferencePackage(DistributionPackage distributionPackage) { |
| super(REFERENCE_PREFIX + distributionPackage.getId(), distributionPackage.getType(), null, null); |
| this.distributionPackage = distributionPackage; |
| this.reference = REFERENCE_PREFIX + distributionPackage.getId(); |
| getInfo().putAll(distributionPackage.getInfo()); |
| getInfo().put("isReference", true); |
| } |
| |
| @Override |
| public void acquire(@Nonnull String... holderNames) { |
| if (distributionPackage instanceof AbstractDistributionPackage) { |
| ((AbstractDistributionPackage) distributionPackage).acquire(holderNames); |
| } |
| } |
| |
| @Override |
| public void release(@Nonnull String... holderNames) { |
| if (distributionPackage instanceof AbstractDistributionPackage) { |
| ((AbstractDistributionPackage) distributionPackage).release(holderNames); |
| } |
| } |
| |
| @Nonnull |
| @Override |
| public InputStream createInputStream() throws IOException { |
| return new ByteArrayInputStream(reference.getBytes()); |
| } |
| |
| @Override |
| public long getSize() { |
| return getId().length(); |
| } |
| |
| @Override |
| public void close() { |
| distributionPackage.close(); |
| } |
| |
| @Override |
| public void delete() { |
| distributionPackage.delete(); |
| } |
| |
| @Nonnull |
| @Override |
| public String getType() { |
| return getInfo().getType(); |
| } |
| |
| @Nonnull |
| @Override |
| public String getId() { |
| return reference; |
| } |
| |
| @Nullable |
| @Override |
| public String getDigestAlgorithm() { |
| if (distributionPackage instanceof AbstractDistributionPackage) { |
| ((AbstractDistributionPackage) distributionPackage).getDigestAlgorithm(); |
| } |
| return null; |
| } |
| |
| @Override |
| public String getDigestMessage() { |
| if (distributionPackage instanceof AbstractDistributionPackage) { |
| ((AbstractDistributionPackage) distributionPackage).getDigestMessage(); |
| } |
| return null; |
| } |
| |
| public static boolean isReference(String string) { |
| return string.startsWith(REFERENCE_PREFIX); |
| } |
| |
| @CheckForNull |
| public static String idFromReference(String reference) { |
| return isReference(reference) ? reference.substring(REFERENCE_PREFIX.length()) : null; |
| } |
| } |