src/main/java/com/aliyun/oss/model/CopyObjectRequest.java [281:367]:
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    public List<String> getMatchingETagConstraints() {
        return matchingETagConstraints;
    }

    /**
     * Sets the ETag matching constraints.
     * 
     * @param matchingETagConstraints
     *            ETag matching constraints.
     */
    public void setMatchingETagConstraints(List<String> matchingETagConstraints) {
        this.matchingETagConstraints.clear();
        if (matchingETagConstraints != null && !matchingETagConstraints.isEmpty()) {
            this.matchingETagConstraints.addAll(matchingETagConstraints);
        }
    }

    public void clearMatchingETagConstraints() {
        this.matchingETagConstraints.clear();
    }

    /**
     * Gets the ETag non-matching constraints.
     * 
     * @return ETag non-matching constraints。
     */
    public List<String> getNonmatchingEtagConstraints() {
        return nonmatchingEtagConstraints;
    }

    /**
     * Sets the ETag non-matching constraints.
     * 
     * @param nonmatchingEtagConstraints
     *            ETag non-matching sontraints.
     */
    public void setNonmatchingETagConstraints(List<String> nonmatchingEtagConstraints) {
        this.nonmatchingEtagConstraints.clear();
        if (nonmatchingEtagConstraints != null && !nonmatchingEtagConstraints.isEmpty()) {
            this.nonmatchingEtagConstraints.addAll(nonmatchingEtagConstraints);
        }
    }

    public void clearNonmatchingETagConstraints() {
        this.nonmatchingEtagConstraints.clear();
    }

    /**
     * Gets the unmodified since constraint.
     * 
     * @return The time threshold. If it's same or later than the actual
     *         modified time, copy the file.
     */
    public Date getUnmodifiedSinceConstraint() {
        return unmodifiedSinceConstraint;
    }

    /**
     * Sets the unmodified since constraint (optional).
     * 
     * @param unmodifiedSinceConstraint
     *            The time threshold. If it's same or later than the actual
     *            modified time, copy the file.
     */
    public void setUnmodifiedSinceConstraint(Date unmodifiedSinceConstraint) {
        this.unmodifiedSinceConstraint = unmodifiedSinceConstraint;
    }

    /**
     * Gets the modified since constraint.
     * 
     * @return The time threshold. If it's earlier than the actual modified
     *         time, copy the file.
     */
    public Date getModifiedSinceConstraint() {
        return modifiedSinceConstraint;
    }

    /**
     * Sets the modified since constraint.
     * 
     * @param modifiedSinceConstraint
     *            The time threshold. If it's earlier than the actual modified
     *            time, copy the file.
     */
    public void setModifiedSinceConstraint(Date modifiedSinceConstraint) {
        this.modifiedSinceConstraint = modifiedSinceConstraint;
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src/main/java/com/aliyun/oss/model/UploadPartCopyRequest.java [319:362]:
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    public List<String> getMatchingETagConstraints() {
        return matchingETagConstraints;
    }

    public void setMatchingETagConstraints(List<String> matchingETagConstraints) {
        this.matchingETagConstraints.clear();
        if (matchingETagConstraints != null && !matchingETagConstraints.isEmpty()) {
            this.matchingETagConstraints.addAll(matchingETagConstraints);
        }
    }

    public void clearMatchingETagConstraints() {
        this.matchingETagConstraints.clear();
    }

    public List<String> getNonmatchingEtagConstraints() {
        return nonmatchingEtagConstraints;
    }

    public void setNonmatchingETagConstraints(List<String> nonmatchingEtagConstraints) {
        this.nonmatchingEtagConstraints.clear();
        if (nonmatchingEtagConstraints != null && !nonmatchingEtagConstraints.isEmpty()) {
            this.nonmatchingEtagConstraints.addAll(nonmatchingEtagConstraints);
        }
    }

    public void clearNonmatchingETagConstraints() {
        this.nonmatchingEtagConstraints.clear();
    }

    public Date getUnmodifiedSinceConstraint() {
        return unmodifiedSinceConstraint;
    }

    public void setUnmodifiedSinceConstraint(Date unmodifiedSinceConstraint) {
        this.unmodifiedSinceConstraint = unmodifiedSinceConstraint;
    }

    public Date getModifiedSinceConstraint() {
        return modifiedSinceConstraint;
    }

    public void setModifiedSinceConstraint(Date modifiedSinceConstraint) {
        this.modifiedSinceConstraint = modifiedSinceConstraint;
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