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| package org.apache.tapestry.services.impl; |
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| import java.util.Collections; |
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| import java.util.HashMap; |
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| import java.util.Map; |
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| import org.apache.commons.logging.Log; |
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| import org.apache.hivemind.ClassResolver; |
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| import org.apache.hivemind.service.ClassFactory; |
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| import org.apache.hivemind.util.Defense; |
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| import org.apache.tapestry.enhance.EnhancedClassValidator; |
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| import org.apache.tapestry.enhance.EnhancementOperationImpl; |
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| import org.apache.tapestry.enhance.EnhancementWorker; |
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| import org.apache.tapestry.event.ResetEventListener; |
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| import org.apache.tapestry.services.ComponentConstructor; |
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| import org.apache.tapestry.services.ComponentConstructorFactory; |
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| import org.apache.tapestry.spec.IComponentSpecification; |
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| public class ComponentConstructorFactoryImpl implements ComponentConstructorFactory, |
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| ResetEventListener |
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| { |
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| private Log _log; |
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| private ClassFactory _classFactory; |
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| private ClassResolver _classResolver; |
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| private EnhancedClassValidator _validator; |
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| private EnhancementWorker _chain; |
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| private Map _cachedConstructors = Collections.synchronizedMap(new HashMap()); |
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| public void resetEventDidOccur()
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| { |
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| _cachedConstructors.clear();
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| } |
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| public ComponentConstructor getComponentConstructor(IComponentSpecification specification,
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| String className) |
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| { |
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| Defense.notNull(specification, "specification");
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| synchronized (specification)
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| { |
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| ComponentConstructor result = (ComponentConstructor) _cachedConstructors
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| .get(specification); |
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| if (result == null)
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| { |
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| Class baseClass = _classResolver.findClass(className);
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| EnhancementOperationImpl eo = new EnhancementOperationImpl(_classResolver,
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| specification, baseClass, _classFactory, _log); |
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| _chain.performEnhancement(eo, specification);
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| result = eo.getConstructor();
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| _validator.validate(baseClass, result.getComponentClass(), specification);
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| _cachedConstructors.put(specification, result);
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| } |
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| return result;
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| } |
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| } |
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| public void setClassFactory(ClassFactory classFactory)
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| { |
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| _classFactory = classFactory;
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| } |
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| public void setClassResolver(ClassResolver classResolver)
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| { |
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| _classResolver = classResolver;
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| } |
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| public void setValidator(EnhancedClassValidator validator)
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| { |
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| _validator = validator;
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| } |
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| public void setChain(EnhancementWorker chain)
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| { |
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| _chain = chain;
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| } |
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| public void setLog(Log log)
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| { |
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| _log = log;
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| } |
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| } |