Using StrategyBuilder service on an interface with a non-conforming method (one
that does not include the selector as the initial parameter) throws an
inscrutable ArrayIndexOutOfBounds exception
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Key: TAP5-1813
URL: https://issues.apache.org/jira/browse/TAP5-1813
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-ioc
Affects Versions: 5.3
Reporter: Howard M. Lewis Ship
Priority: Minor
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
at
org.apache.tapestry5.internal.plastic.InstructionBuilderImpl.loadArgument(InstructionBuilderImpl.java:171)
~[plastic-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.StrategyBuilderImpl$1$1.doBuild(StrategyBuilderImpl.java:76)
~[tapestry-ioc-5.3.1.jar:na]
at
org.apache.tapestry5.internal.plastic.InstructionBuilderImpl.doCallback(InstructionBuilderImpl.java:832)
~[plastic-5.3.1.jar:na]
at
org.apache.tapestry5.internal.plastic.PlasticMethodImpl.changeImplementation(PlasticMethodImpl.java:130)
~[plastic-5.3.1.jar:na]
at
org.apache.tapestry5.internal.plastic.PlasticClassImpl.introduceMethod(PlasticClassImpl.java:647)
~[plastic-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.StrategyBuilderImpl$1.transform(StrategyBuilderImpl.java:65)
~[tapestry-ioc-5.3.1.jar:na]
at
org.apache.tapestry5.plastic.PlasticManager.createProxy(PlasticManager.java:235)
~[plastic-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.PlasticProxyFactoryImpl.createProxy(PlasticProxyFactoryImpl.java:60)
~[tapestry-ioc-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.StrategyBuilderImpl.createProxy(StrategyBuilderImpl.java:56)
~[tapestry-ioc-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.StrategyBuilderImpl.build(StrategyBuilderImpl.java:44)
~[tapestry-ioc-5.3.1.jar:na]
at
org.apache.tapestry5.ioc.internal.services.StrategyBuilderImpl.build(StrategyBuilderImpl.java:51)
~[tapestry-ioc-5.3.1.jar:na]
at $StrategyBuilder_1265847ad7894079.build(Unknown Source) ~[na:na]
This traces into code that attempts to load the first argument (argument 0, as
Plastic numbers them) which fails because the method contains no parameters. A
better case would be to check that each method takes at least one parameter,
and preferably, find a way to ensure that the first parameter is the correct
selector type.
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