io.minio.CopyConditions.java Source code

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Here is the source code for io.minio.CopyConditions.java

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/*
 * MinIO Java SDK for Amazon S3 Compatible Cloud Storage,
 * (C) 2017 MinIO,Inc.
 *
 * 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 io.minio;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.joda.time.DateTime;

import io.minio.errors.InvalidArgumentException;

/**
 * A container class to hold all the Conditions to be checked
 * before copying an object.
 */
public class CopyConditions {
    // Metadata directive "REPLACE" used to replace metadata on
    // destination object in copyObject().
    private static final String METADATA_DIRECTIVE_REPLACE = "REPLACE";

    private Map<String, String> copyConditions = new HashMap<>();

    /**
     * Set modified condition, copy object modified since given time.
     *
     * @throws InvalidArgumentException
     *           When date is null
     */
    public void setModified(DateTime date) throws InvalidArgumentException {
        if (date == null) {
            throw new InvalidArgumentException("Date cannot be empty");
        }
        copyConditions.put("x-amz-copy-source-if-modified-since",
                date.toString(DateFormat.HTTP_HEADER_DATE_FORMAT));
    }

    /**
     * Sets object unmodified condition, copy object unmodified since given time.
     *
     * @throws InvalidArgumentException
     *           When date is null
     */
    public void setUnmodified(DateTime date) throws InvalidArgumentException {
        if (date == null) {
            throw new InvalidArgumentException("Date can not be null");
        }

        copyConditions.put("x-amz-copy-source-if-unmodified-since",
                date.toString(DateFormat.HTTP_HEADER_DATE_FORMAT));
    }

    /**
     * Set matching ETag condition, copy object which matches
     * the following ETag.
     *
     * @throws InvalidArgumentException
     *           When etag is null
     */
    public void setMatchETag(String etag) throws InvalidArgumentException {
        if (etag == null) {
            throw new InvalidArgumentException("ETag cannot be empty");
        }
        copyConditions.put("x-amz-copy-source-if-match", etag);
    }

    /**
     * Set matching ETag none condition, copy object which does not
     * match the following ETag.
     *
     * @throws InvalidArgumentException
     *           When etag is null
     */
    public void setMatchETagNone(String etag) throws InvalidArgumentException {
        if (etag == null) {
            throw new InvalidArgumentException("ETag cannot be empty");
        }
        copyConditions.put("x-amz-copy-source-if-none-match", etag);
    }

    /**
     * Set replace metadata directive which specifies that
     * destination object after copyObject() sets new
     * metadata provided in the request.
     */
    public void setReplaceMetadataDirective() {
        copyConditions.put("x-amz-metadata-directive", METADATA_DIRECTIVE_REPLACE);
    }

    /**
     * Get all the set copy conditions map.
     *
     */
    public Map<String, String> getConditions() {
        return Collections.unmodifiableMap(copyConditions);
    }
}