org.jclouds.azureblob.binders.BindAzureBlobMetadataToRequest.java Source code

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Here is the source code for org.jclouds.azureblob.binders.BindAzureBlobMetadataToRequest.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.azureblob.binders;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.ws.rs.core.HttpHeaders;

import org.jclouds.azureblob.blobstore.functions.AzureBlobToBlob;
import org.jclouds.azureblob.domain.AzureBlob;
import org.jclouds.blobstore.binders.BindUserMetadataToHeadersWithPrefix;
import org.jclouds.http.HttpRequest;
import org.jclouds.rest.Binder;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import com.google.common.collect.Multimaps;

@Singleton
public class BindAzureBlobMetadataToRequest implements Binder {

    private final AzureBlobToBlob azureBlob2Blob;
    private final BindUserMetadataToHeadersWithPrefix blobBinder;

    @Inject
    public BindAzureBlobMetadataToRequest(AzureBlobToBlob azureBlob2Blob,
            BindUserMetadataToHeadersWithPrefix blobBinder) {
        this.azureBlob2Blob = checkNotNull(azureBlob2Blob, "azureBlob2Blob");
        this.blobBinder = checkNotNull(blobBinder, "blobBinder");
    }

    @SuppressWarnings("unchecked")
    @Override
    public <R extends HttpRequest> R bindToRequest(R request, Object input) {
        checkArgument(checkNotNull(input, "input") instanceof AzureBlob,
                "this binder is only valid for AzureBlobs!");
        checkNotNull(request, "request");
        AzureBlob blob = AzureBlob.class.cast(input);

        checkArgument(blob.getPayload().getContentMetadata().getContentLength() != null
                && blob.getPayload().getContentMetadata().getContentLength() >= 0, "size must be set");

        Builder<String, String> headers = ImmutableMap.builder();

        headers.put("x-ms-blob-type", blob.getProperties().getType().toString());

        switch (blob.getProperties().getType()) {
        case PAGE_BLOB:
            headers.put(HttpHeaders.CONTENT_LENGTH, "0");
            headers.put("x-ms-blob-content-length",
                    blob.getPayload().getContentMetadata().getContentLength().toString());
            break;
        case BLOCK_BLOB:
            checkArgument(checkNotNull(blob.getPayload().getContentMetadata().getContentLength(),
                    "blob.getContentLength()") <= 64l * 1024 * 1024, "maximum size for put Blob is 64MB");
            break;
        }
        request = (R) request.toBuilder().replaceHeaders(Multimaps.forMap(headers.build())).build();

        return blobBinder.bindToRequest(request, azureBlob2Blob.apply(blob));
    }
}