org.jclouds.openstack.swift.v1.blobstore.functions.ToSwiftObject.java Source code

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Here is the source code for org.jclouds.openstack.swift.v1.blobstore.functions.ToSwiftObject.java

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/*
 * 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.jclouds.openstack.swift.v1.blobstore.functions;

import org.jclouds.blobstore.domain.BlobMetadata;
import org.jclouds.blobstore.domain.StorageMetadata;
import org.jclouds.io.Payload;
import org.jclouds.io.Payloads;
import org.jclouds.openstack.swift.v1.domain.SwiftObject;
import org.jclouds.openstack.swift.v1.domain.SwiftObject.Builder;

import com.google.common.base.Function;
import com.google.common.io.ByteSource;

public class ToSwiftObject implements Function<StorageMetadata, SwiftObject> {

    @Override
    public SwiftObject apply(StorageMetadata in) {
        if (!(in instanceof BlobMetadata)) {
            return null;
        }
        BlobMetadata from = BlobMetadata.class.cast(in);
        Builder to = SwiftObject.builder();
        to.name(from.getName());
        to.etag(from.getETag());
        to.lastModified(from.getLastModified());
        long bytes = from.getContentMetadata().getContentLength();
        String contentType = from.getContentMetadata().getContentType();
        to.payload(payload(bytes, contentType));
        to.metadata(from.getUserMetadata());
        return to.build();
    }

    private static Payload payload(long bytes, String contentType) {
        Payload payload = Payloads.newByteSourcePayload(ByteSource.empty());
        payload.getContentMetadata().setContentLength(bytes);
        payload.getContentMetadata().setContentType(contentType);
        return payload;
    }
}