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package org.apache.myfaces.webapp; |
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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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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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36 | 0 | public class Jsp20FacesInitializer extends AbstractFacesInitializer |
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{ |
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41 | 0 | private static final Log log = LogFactory.getLog(Jsp20FacesInitializer.class); |
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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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56 | 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( |
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ServletContext servletContext, ExternalContext externalContext) |
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{ |
64 | 0 | if (log.isInfoEnabled()) { |
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) { |
77 | 0 | if (log.isInfoEnabled()) { |
78 | 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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83 | 0 | expressionFactory = findExpressionFactory(KNOWN_EXPRESSION_FACTORIES); |
84 | 0 | if (expressionFactory == null) { |
85 | 0 | if (log.isErrorEnabled()) { |
86 | 0 | log.error("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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91 | 0 | expressionFactory = new ErrorExpressionFactory(); |
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} |
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} |
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95 | 0 | if (log.isDebugEnabled()) { |
96 | 0 | log.debug("The following ExpressionFactory implementation will " |
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+ "be used: '" + expressionFactory + "'."); |
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} |
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100 | 0 | buildConfiguration(servletContext, externalContext, expressionFactory); |
101 | 0 | } |
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private static ExpressionFactory findExpressionFactory(String[] expressionFactoryClassNames) |
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{ |
119 | 0 | for (String expressionFactoryClassName : expressionFactoryClassNames) { |
120 | 0 | ExpressionFactory expressionFactory = |
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loadExpressionFactory(expressionFactoryClassName); |
122 | 0 | if (expressionFactory != null) { |
123 | 0 | return expressionFactory; |
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} |
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} |
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127 | 0 | return null; |
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} |
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137 | 0 | private class ErrorExpressionFactory extends ExpressionFactory |
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{ |
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public Object coerceToType(Object obj, Class<?> targetType) |
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{ |
142 | 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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public MethodExpression createMethodExpression(ELContext context, |
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String expression, Class<?> expectedReturnType, Class<?>[] expectedParamTypes) |
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{ |
149 | 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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public ValueExpression createValueExpression(Object instance, Class<?> expectedType) |
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{ |
155 | 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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public ValueExpression createValueExpression( |
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ELContext context, String expression, Class<?> expectedType) |
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{ |
162 | 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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} |