The following is an example of its usage:

   <target name="setState">
     <property
       name="header"
       value="##Generated file - do not modify!"/>
     <propertyfile file="apropfile.properties" comment="${header}">
       <entry key="product.version.major" type="int"  value="5"/>
       <entry key="product.version.minor" type="int"  value="0"/>
       <entry key="product.build.major"   type="int"  value="0" />
       <entry key="product.build.minor"   type="int"  operation="+"/>
       <entry key="product.build.date"    type="date" value="now"/>
       <entry key="intSet" type="int" operation="=" value="681"/>
       <entry key="intDec" type="int" operation="-"/>
       <entry key="StringEquals" type="string" value="testValue"/>
    </propertyfile>
  </target>

The <propertyfile> task must have:

• file

• comment
• key
• operation
• type
• value (the final four being eliminated shortly)

The <entry> task must have:

• key

• operation
• type
• value
• default
• unit

If type is unspecified, it defaults to string.

operation:

• "=" (set -- default)
• "-" (dec)
• "+" (inc)

type:

• "int"
• "date"
• "string"

value:

• holds the default value, if the property was not found in property file
• "now" In case of type "date", the value "now" will be replaced by the current date/time and used even if a valid date was found in the property file.

String property types can only use the "=" operation. Int property types can only use the "=", "-" or "+" operations.

The message property is used for the property file header, with "\\" being a newline delimiter character.