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The Azure Storage Java Blob library.
There is a newer version: 11.0.1
/*
 * Copyright Microsoft Corporation
 *
 * 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 com.microsoft.azure.storage.blob;

import com.microsoft.azure.storage.blob.models.AppendPositionAccessConditions;
import com.microsoft.azure.storage.blob.models.LeaseAccessConditions;
import com.microsoft.azure.storage.blob.models.ModifiedAccessConditions;

/**
 * This class contains values that restrict the successful completion of AppendBlock operations to certain conditions.
 * Any field may be set to null if no access conditions are desired.
 * 
 * Please refer to the request header section
 * here for more conceptual
 * information.
 */
public final class AppendBlobAccessConditions {

    /**
     * An object representing no access conditions.
     */
    public static final AppendBlobAccessConditions NONE =
            new AppendBlobAccessConditions();

    private AppendPositionAccessConditions appendPositionAccessConditions;

    private ModifiedAccessConditions modifiedAccessConditions;

    private LeaseAccessConditions leaseAccessConditions;

    /**
     * Creates an instance which has fields set to non-null, empty values.
     */
    public AppendBlobAccessConditions() {
        appendPositionAccessConditions = new AppendPositionAccessConditions();
        modifiedAccessConditions = new ModifiedAccessConditions();
        leaseAccessConditions = new LeaseAccessConditions();
    }

    /**
     * Access conditions used for appending data only if the operation meets the provided conditions related to the
     * size of the append blob.
     */
    public AppendPositionAccessConditions appendPositionAccessConditions() {
        return appendPositionAccessConditions;
    }

    /**
     * Access conditions used for appending data only if the operation meets the provided conditions related to the
     * size of the append blob.
     */
    public AppendBlobAccessConditions withAppendPositionAccessConditions(
            AppendPositionAccessConditions appendPositionAccessConditions) {
        this.appendPositionAccessConditions = appendPositionAccessConditions;
        return this;
    }

    /**
     * Standard HTTP Access conditions related to the modification of data. ETag and LastModifiedTime are used to
     * construct conditions related to when the blob was changed relative to the given request. The request
     * will fail if the specified condition is not satisfied.
     */
    public ModifiedAccessConditions modifiedAccessConditions() {
        return modifiedAccessConditions;
    }

    /**
     * Standard HTTP Access conditions related to the modification of data. ETag and LastModifiedTime are used to
     * construct conditions related to when the blob was changed relative to the given request. The request
     * will fail if the specified condition is not satisfied.
     */
    public AppendBlobAccessConditions withModifiedAccessConditions(ModifiedAccessConditions modifiedAccessConditions) {
        this.modifiedAccessConditions = modifiedAccessConditions;
        return this;
    }

    /**
     * By setting lease access conditions, requests will fail if the provided lease does not match the active lease on
     * the blob.
     */
    public LeaseAccessConditions leaseAccessConditions() {
        return leaseAccessConditions;
    }

    /**
     * By setting lease access conditions, requests will fail if the provided lease does not match the active lease on
     * the blob.
     */
    public AppendBlobAccessConditions withLeaseAccessConditions(LeaseAccessConditions leaseAccessConditions) {
        this.leaseAccessConditions = leaseAccessConditions;
        return this;
    }
}