Available tag in ant is always true if a file is unavailable also

Question

This code is always returning a true value even if file at given path does not exists

   <available file="${x}/schema/@{componentname}-schema.sql" type="file"      property="schema.file" />
      <if>
          <equals arg1="true" arg2="${schema.file}" />
            <then>
        <debug message="****schemafile is  ${schema.file} ******" />
            </then>
</if>

Output is always :- *schemafile is true***

even if file is not available at that path. Please help me to find the error.

Answer 1

problem was i was iterating above code in for loop, and since property is immutable, it is always set to true if set at-least once. Thats why after 1 iteration even if the file was not found, it echoes schemafile is true** .

i have added below code to set property to false after that code

<var name="schema.file" unset="true"/>
<property name="schema.file" value="false"/>