I'm mid-process in converting Tapestry from Maven to Antlr.
My first stumbling point is Antlr; Tapestry users Antlr for its
property expression language.
There's something odd in my Maven pom.xml:
<plugin>
<groupId>org.antlr</groupId>
<artifactId>antlr3-maven-plugin</artifactId>
<version>3.1.1.2</version>
<executions>
<execution>
<goals>
<goal>antlr</goal>
</goals>
<configuration>
<!-- This is a hack so that the parser grammar can
locate the tokens file generated by
the lexer grammar. -->
<libDirectory>target/generated-sources/antlr/org/apache/tapestry5/internal/antlr
</libDirectory>
</configuration>
</execution>
</executions>
</plugin>
My build.gradle is much simpler:
description="Central module for Tapestry, containing all core services
and components"
apply plugin: 'antlr'
dependencies {
compile project(':tapestry-ioc')
compile project(':tapestry-json')
testCompile project(':tapestry-test')
compile "commons-codec:commons-codec:1.3"
compile "javax.servlet:servlet-api:2.4"
antlr 'org.antlr:antlr:3.3'
}
However, my build fails pretty quickly:
$ gr clean compileJ
:tapestry-core:clean
:tapestry-annotations:compileJava UP-TO-DATE
:tapestry-annotations:compileGroovy UP-TO-DATE
:tapestry-annotations:processResources UP-TO-DATE
:tapestry-annotations:classes UP-TO-DATE
:tapestry-annotations:jar UP-TO-DATE
:tapestry-annotations:sourcesJar UP-TO-DATE
:tapestry-core:generateGrammarSource
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/antlr/org/apache/tapestry5/internal/antlr/PropertyExpressionLexer.g:15:1:
unexpected token: lexer
error: Token stream error reading grammar(s):
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/antlr/org/apache/tapestry5/internal/antlr/PropertyExpressionLexer.g:20:16:
expecting ''', found 'r'
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/antlr/org/apache/tapestry5/internal/antlr/PropertyExpressionParser.g:15:1:
unexpected token: parser
error: Token stream error reading grammar(s):
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/antlr/org/apache/tapestry5/internal/antlr/PropertyExpressionParser.g:20:16:
expecting ''', found 'r'
:tapestry-func:compileJava UP-TO-DATE
:tapestry-func:compileGroovy UP-TO-DATE
:tapestry-func:processResources UP-TO-DATE
:tapestry-func:classes UP-TO-DATE
:tapestry-func:jar UP-TO-DATE
:tapestry-func:sourcesJar UP-TO-DATE
:tapestry-ioc:compileJava UP-TO-DATE
:tapestry-ioc:compileGroovy UP-TO-DATE
:tapestry-ioc:processResources UP-TO-DATE
:tapestry-ioc:classes UP-TO-DATE
:tapestry-ioc:jar UP-TO-DATE
:tapestry-ioc:sourcesJar UP-TO-DATE
:tapestry-json:compileJava UP-TO-DATE
:tapestry-json:compileGroovy UP-TO-DATE
:tapestry-json:processResources UP-TO-DATE
:tapestry-json:classes UP-TO-DATE
:tapestry-json:jar UP-TO-DATE
:tapestry-json:sourcesJar UP-TO-DATE
:tapestry-core:compileJava
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/java/org/apache/tapestry5/internal/services/PropertyConduitSourceImpl.java:21:
cannot find symbol
symbol : class PropertyExpressionLexer
location: package org.apache.tapestry5.internal.antlr
import org.apache.tapestry5.internal.antlr.PropertyExpressionLexer;
Here's the start of my lexer grammer:
lexer grammar PropertyExpressionLexer;
options
{
superClass='org.apache.tapestry5.internal.antlr.BaseLexer';
}
@header
{
package org.apache.tapestry5.internal.antlr;
}
... which means that I need Antlr 3 to process this. Is that my
problem? The ANTLR Ant task documentation implies that we're limited
to Antlr 2.x.
--
Howard M. Lewis Ship
Creator of Apache Tapestry
The source for Tapestry training, mentoring and support. Contact me to
learn how I can get you up and productive in Tapestry fast!
(971) 678-5210
http://howardlewisship.com
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