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package org.apache.myfaces.webapp; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import javax.el.ELContext; |
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import javax.el.ExpressionFactory; |
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import javax.el.MethodExpression; |
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import javax.el.ValueExpression; |
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import javax.faces.FacesException; |
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import javax.faces.context.ExternalContext; |
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import javax.servlet.ServletContext; |
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36 | 0 | public class Jsp20FacesInitializer extends AbstractFacesInitializer |
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{ |
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42 | 0 | private static final Logger log = Logger.getLogger(Jsp20FacesInitializer.class.getName()); |
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private static final String EL_RI_EXPRESSION_FACTORY_IMPL = "com.sun.el.ExpressionFactoryImpl"; |
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private static final String JASPER_EL_EXPRESSION_FACTORY_IMPL = "org.apache.el.ExpressionFactoryImpl"; |
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57 | 0 | private static final String[] KNOWN_EXPRESSION_FACTORIES = |
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new String[] { EL_RI_EXPRESSION_FACTORY_IMPL, JASPER_EL_EXPRESSION_FACTORY_IMPL }; |
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@Override |
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protected void initContainerIntegration(ServletContext servletContext, ExternalContext externalContext) |
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{ |
63 | 0 | if (log.isLoggable(Level.INFO)) |
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{ |
65 | 0 | log.info("This application isn't running in a JSP 2.1 container."); |
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} |
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74 | 0 | ExpressionFactory expressionFactory = getUserDefinedExpressionFactory(externalContext); |
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76 | 0 | if (expressionFactory == null) |
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{ |
78 | 0 | if (log.isLoggable(Level.INFO)) |
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{ |
80 | 0 | log.info("Either you haven't specified the ExpressionFactory implementation, or an " |
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+ "error occured while instantiating the implementation you've specified. " |
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+ "However, attempting to load a known implementation."); |
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} |
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85 | 0 | expressionFactory = findExpressionFactory(KNOWN_EXPRESSION_FACTORIES); |
86 | 0 | if (expressionFactory == null) |
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{ |
88 | 0 | if (log.isLoggable(Level.SEVERE)) |
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{ |
90 | 0 | log.severe("No valid ExpressionFactory implementation is available " |
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+ "but that's required as this application isn't running in a JSP 2.1 container."); |
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} |
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95 | 0 | expressionFactory = new ErrorExpressionFactory(); |
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} |
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} |
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99 | 0 | if (log.isLoggable(Level.FINE)) |
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{ |
101 | 0 | log.fine("The following ExpressionFactory implementation will " + "be used: '" + expressionFactory + "'."); |
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} |
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104 | 0 | buildConfiguration(servletContext, externalContext, expressionFactory); |
105 | 0 | } |
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private static ExpressionFactory findExpressionFactory(String[] expressionFactoryClassNames) |
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{ |
121 | 0 | for (String expressionFactoryClassName : expressionFactoryClassNames) |
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{ |
123 | 0 | ExpressionFactory expressionFactory = loadExpressionFactory(expressionFactoryClassName); |
124 | 0 | if (expressionFactory != null) |
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{ |
126 | 0 | return expressionFactory; |
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} |
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} |
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130 | 0 | return null; |
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} |
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139 | 0 | private class ErrorExpressionFactory extends ExpressionFactory |
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{ |
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@Override |
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public Object coerceToType(Object obj, Class<?> targetType) |
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{ |
145 | 0 | throw new FacesException("No valid ExpressionFactory implementation is available " |
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+ "but that's required as this application isn't running in a JSP 2.1 container."); |
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} |
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@Override |
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public MethodExpression createMethodExpression(ELContext context, String expression, |
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Class<?> expectedReturnType, Class<?>[] expectedParamTypes) |
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{ |
153 | 0 | throw new FacesException("No valid ExpressionFactory implementation is available " |
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+ "but that's required as this application isn't running in a JSP 2.1 container."); |
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} |
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@Override |
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public ValueExpression createValueExpression(Object instance, Class<?> expectedType) |
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{ |
160 | 0 | throw new FacesException("No valid ExpressionFactory implementation is available " |
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+ "but that's required as this application isn't running in a JSP 2.1 container."); |
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} |
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@Override |
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public ValueExpression createValueExpression(ELContext context, String expression, Class<?> expectedType) |
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{ |
167 | 0 | throw new FacesException("No valid ExpressionFactory implementation is available " |
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+ "but that's required as this application isn't running in a JSP 2.1 container."); |
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} |
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} |
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} |