Ant-contrib : equals doesn't work in for loop

Question

I have a file build.properties:

a=test1
b=
c=test2

And a file build.xml :

<property file="build.properties" />    

<for list="${a},${b},${c}" param="params">
    <sequential>
        <echo message="@{params}"></echo>
        <if>
            <equals arg1="@{params}" arg2=""/>
            <then><echo message="empty"/></then>
            <else><echo message="ok"/></else>
        </if>
    </sequential>
</for>

I obtain:

[echo] test1
[echo] ok
[echo] test 2
[echo] ok

But I want:

[echo] test1
[echo] ok
[echo] empty
[echo] test 2
[echo] ok

What's happen?

Thanks for any help.

M A · Answer 1 · 2015-02-24T17:55:12.100

2

The for task of Ant-Contrib uses the Java StringTokenizer class to tokenize the list of parameters. When tokenizing using this class, empty tokens are skipped, which is the case for property b in your case.

One solution is to add whitespace to the comma-separated list, and trim the token in the loop body:

<for list="${a}, ${b}, ${c}" param="params">
    <sequential>
        <propertyregex override="yes" property="trimmed.param" input="@{params}"
                regexp=" " replace="" global="true" defaultValue="@{params}" />
        <echo message="${trimmed.param}"/>
        <if>
            <equals arg1="${trimmed.param}" arg2=""/>   
            <then>
                <echo message="empty"/>
            </then>
            <else>
                <echo message="ok"/>
            </else>
        </if>
    </sequential>
</for>

edited Feb 24 '15 at 17:55

answered Feb 24 '15 at 17:21

M A

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Thank you ! And now, if i want replace by , how can i do this ? – Feb 25 '15 at 13:18
@user1517752 If you liked the answer from manouti, please mark it Answered. – Chad Nouis Feb 26 '15 at 16:07
@user1517752 I don't understand what you mean by the replacement? Could you update the question? – M A Feb 26 '15 at 16:42

Ant-contrib : equals doesn't work in for loop

1 Answers1