jonathan doklovic schrieb:
Hi,
I'm using commons-config-1.5
I have created a Configuration class that extends CombinedConfiguration
and I can't get property interpolation to work.
I decided to step back and just try a simple test case, and I can get
that to work either. Here's what I have:
testPropExpansion.properties
-----------------------------
base.prop=root
client.prop=got ${base.prop}?
TestPropertyExpansion.java
-----------------------------
@Test
public void genericExpansion() throws Exception {
File props = new File("testPropExpansion.properties");
Configuration cfg = new PropertiesConfiguration(props);
assert cfg.getProperty("client.prop").equals("got root?") :
"expected: got root? received: " + cfg.getProperty("client.prop");
}
Test output
--------------
genericExpansion - Failure - expected: got root? received: got
${base.prop}?
java.lang.AssertionError: expected: got root? received: got
${base.prop}?
at
com.ibsys.headline.config.TestPropertyExpansion.genericExpansion(TestPropertyExpansion.java:17)
... Removed 22 stack frames
Why is this test failing?
- Jonathan
The getProperty() method you use for obtaining the property value does
not do any interpolation. (This is also stated in the Javadocs.) Use the
getString() method instead.
This is a frequently asked question. Maybe we should change something to
make this more obvious?
Oliver
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