geotrellis.store.s3.cog.S3COGCollectionLayerProvider.scala Maven / Gradle / Ivy

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geographic data processing library for high performance applications

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/*
 * Copyright 2017 Azavea
 *
 * 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 geotrellis.store.s3.cog

import geotrellis.store._
import geotrellis.store.cog._
import geotrellis.store.s3._

import java.net.URI

/**
 * Provides [[S3LayerReader]] instance for URI with `s3` scheme.
 * The uri represents S3 bucket an prefix of catalog root.
 *  ex: `s3:///`
 */
class S3COGCollectionLayerProvider extends AttributeStoreProvider with COGValueReaderProvider with COGCollectionLayerReaderProvider {

  @transient lazy val client = S3ClientProducer.get()

  def canProcess(uri: URI): Boolean = uri.getScheme match {
    case str: String => if (str.toLowerCase == "s3") true else false
    case null => false
  }

  def attributeStore(uri: URI): AttributeStore = {
    // Need to use an alternative to AmazonS3URI
    // https://github.com/aws/aws-sdk-java-v2/issues/860
    val s3Uri = new AmazonS3URI(uri)
    val prefix = Option(s3Uri.getKey).getOrElse("")

    new S3AttributeStore(bucket = s3Uri.getBucket, prefix = prefix, client)
  }

  def valueReader(uri: URI, store: AttributeStore): COGValueReader[LayerId] = {
    new S3COGValueReader(store, client)
  }

  def collectionLayerReader(uri: URI, store: AttributeStore): COGCollectionLayerReader[LayerId] = {
    new S3COGCollectionLayerReader(store)
  }
}