ValidateDynamicLargeObjectHasParts.java

/*
 * Copyright 2016 The Simple File Server Authors
 *
 * 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.sfs.validate;

import io.vertx.core.json.JsonObject;
import org.sfs.util.HttpRequestValidationException;
import org.sfs.vo.TransientVersion;
import rx.functions.Func1;

import static com.google.common.collect.Iterables.isEmpty;
import static java.lang.String.format;
import static java.net.HttpURLConnection.HTTP_NOT_FOUND;

public class ValidateDynamicLargeObjectHasParts implements Func1<Iterable<TransientVersion>, Void> {

    private final TransientVersion objectManifestVersion;

    public ValidateDynamicLargeObjectHasParts(TransientVersion objectManifestVersion) {
        this.objectManifestVersion = objectManifestVersion;
    }

    @Override
    public Void call(Iterable<TransientVersion> parts) {
        if (isEmpty(parts)) {

            JsonObject jsonObject = new JsonObject()
                    .put("message", format("Version %d has object manifest %s but no parts were found", objectManifestVersion.getId(), objectManifestVersion.getObjectManifest().get()));

            throw new HttpRequestValidationException(HTTP_NOT_FOUND, jsonObject);
        }
        return null;
    }
}