org.jclouds.s3.binders.BindIterableAsPayloadToDeleteRequest.java Source code

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Here is the source code for org.jclouds.s3.binders.BindIterableAsPayloadToDeleteRequest.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.s3.binders;

import static com.google.common.base.Charsets.UTF_8;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.hash.Hashing.md5;

import java.util.Properties;

import javax.ws.rs.core.MediaType;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.TransformerException;

import com.google.common.base.Throwables;
import com.google.common.collect.Iterables;
import com.jamesmurty.utils.XMLBuilder;

import org.jclouds.http.HttpRequest;
import org.jclouds.io.Payload;
import org.jclouds.io.Payloads;
import org.jclouds.rest.Binder;

public class BindIterableAsPayloadToDeleteRequest implements Binder {

    @SuppressWarnings("unchecked")
    @Override
    public <R extends HttpRequest> R bindToRequest(R request, Object input) {
        checkArgument(checkNotNull(input, "input is null") instanceof Iterable,
                "this binder is only valid for an Iterable");
        checkNotNull(request, "request is null");

        Iterable<String> keys = (Iterable<String>) input;
        checkArgument(!Iterables.isEmpty(keys), "The list of keys should not be empty.");

        String content;
        try {
            XMLBuilder rootBuilder = XMLBuilder.create("Delete");
            for (String key : keys) {
                XMLBuilder ownerBuilder = rootBuilder.elem("Object");
                XMLBuilder keyBuilder = ownerBuilder.elem("Key").text(key);
            }

            Properties outputProperties = new Properties();
            outputProperties.put(OutputKeys.OMIT_XML_DECLARATION, "yes");
            content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + rootBuilder.asString(outputProperties);
        } catch (ParserConfigurationException pce) {
            throw Throwables.propagate(pce);
        } catch (TransformerException te) {
            throw Throwables.propagate(te);
        }

        Payload payload = Payloads.newStringPayload(content);
        payload.getContentMetadata().setContentType(MediaType.TEXT_XML);
        byte[] md5 = md5().hashString(content, UTF_8).asBytes();
        payload.getContentMetadata().setContentMD5(md5);
        request.setPayload(payload);
        return request;
    }
}