org.springframework.aws.ivy.S3Resource.java Source code

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Here is the source code for org.springframework.aws.ivy.S3Resource.java

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/*
 * Copyright 2010 SpringSource
 *
 * 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 org.springframework.aws.ivy;

import java.io.IOException;
import java.io.InputStream;

import org.apache.ivy.plugins.repository.Resource;

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.ObjectListing;
import com.amazonaws.services.s3.model.S3ObjectSummary;

/**
 * A Resource implementation that extracts its data from an S3 resource.
 * 
 * @author Ben Hale
 */
public class S3Resource implements Resource {

    private final AmazonS3 service;
    private final S3ObjectSummary summary;
    private final String uri;

    public S3Resource(AmazonS3 service, S3ObjectSummary summary) {
        this.service = service;
        this.summary = summary;
        this.uri = "s3://" + summary.getBucketName() + "/" + summary.getKey();
    }

    public S3Resource(AmazonS3 service, String uri) {
        this.service = service;
        this.uri = uri;
        ObjectListing objects = service.listObjects(S3Utils.getBucket(uri), S3Utils.getKey(uri));
        if (objects.getObjectSummaries().size() == 0) {
            summary = null;
        } else {
            summary = objects.getObjectSummaries().get(0);
        }
    }

    public Resource clone(String newUri) {
        return new S3Resource(service, newUri);
    }

    public boolean exists() {
        return summary != null;
    }

    public long getContentLength() {
        return summary == null ? 0 : summary.getSize();
    }

    public long getLastModified() {
        return summary == null ? 0 : summary.getLastModified().getTime();
    }

    public String getName() {
        return uri;
    }

    public boolean isLocal() {
        return false;
    }

    public InputStream openStream() throws IOException {
        return service.getObject(summary.getBucketName(), summary.getKey()).getObjectContent();
    }

    @Override
    public String toString() {
        return getName();
    }
}