public String getConditionExpression() {
        return this.conditionExpression;
    }
<p>
A condition that must be satisfied in order for a conditional <code>PutItem</code> operation to succeed.
</p>
<p>
An expression can contain any of the following:
</p>
<ul>
<li>
<p>
Functions: <code>attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size</code>
</p>
<p>
These function names are case-sensitive.
</p>
</li>
<li>
<p>
Comparison operators: <code>= | &lt;&gt; | &lt; | &gt; | &lt;= | &gt;= | BETWEEN | IN </code>
</p>
</li>
<li>
<p>
Logical operators: <code>AND | OR | NOT</code>
</p>
</li>
</ul>
<p>
For more information on condition expressions, see <a
href="https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html"
>Condition Expressions</a> in the <i>Amazon DynamoDB Developer Guide</i>.
</p>

@return A condition that must be satisfied in order for a conditional <code>PutItem</code> operation to
        succeed.</p>
        <p>
        An expression can contain any of the following:
        </p>
        <ul>
        <li>
        <p>
        Functions:
        <code>attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size</code>
        </p>
        <p>
        These function names are case-sensitive.
        </p>
        </li>
        <li>
        <p>
        Comparison operators: <code>= | &lt;&gt; | &lt; | &gt; | &lt;= | &gt;= | BETWEEN | IN </code>
        </p>
        </li>
        <li>
        <p>
        Logical operators: <code>AND | OR | NOT</code>
        </p>
        </li>
        </ul>
        <p>
        For more information on condition expressions, see <a href=
        "https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html"
        >Condition Expressions</a> in the <i>Amazon DynamoDB Developer Guide</i>.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/PutItemRequest.java