SWF-389 - Encapsulate the recommended default Web Flow configuration for a JSF environment.
This commit is contained in:
Jeremy Grelle
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package org.springframework.faces.config;
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import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
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public class FacesConfigNamespaceHandler extends NamespaceHandlerSupport {
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public void init() {
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registerBeanDefinitionParser("flow-builder-services", new FacesFlowBuilderServicesBeanDefinitionParser());
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}
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}
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package org.springframework.faces.config;
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import org.springframework.beans.factory.support.BeanDefinitionBuilder;
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import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
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import org.springframework.beans.factory.xml.BeanDefinitionParser;
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import org.springframework.faces.expression.LegacyJSFELExpressionParser;
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import org.springframework.faces.model.converter.FacesConversionService;
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import org.springframework.faces.webflow.JsfViewFactoryCreator;
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import org.springframework.util.StringUtils;
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import org.springframework.webflow.core.expression.el.WebFlowELExpressionParser;
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import org.springframework.webflow.engine.builder.support.FlowBuilderServices;
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import org.w3c.dom.Element;
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public class FacesFlowBuilderServicesBeanDefinitionParser extends AbstractSingleBeanDefinitionParser implements
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BeanDefinitionParser {
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private static final String ENABLE_MANAGED_BEANS_ATTRIBUTE = "enable-managed-beans";
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private static final String EXPRESSION_PARSER_ATTRIBUTE = "expression-parser";
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private static final String EXPRESSION_PARSER_PROPERTY = "expressionParser";
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private static final String VIEW_FACTORY_CREATOR_ATTRIBUTE = "view-factory-creator";
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private static final String VIEW_FACTORY_CREATOR_PROPERTY = "viewFactoryCreator";
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private static final String CONVERSION_SERVICE_ATTRIBUTE = "conversion-service";
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private static final String CONVERSION_SERVICE_PROPERTY = "conversionService";
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protected Class getBeanClass(Element element) {
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return FlowBuilderServices.class;
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}
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protected void doParse(Element element, BeanDefinitionBuilder definitionBuilder) {
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boolean enableManagedBeans = parseEnableManagedBeans(element, definitionBuilder);
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if (!enableManagedBeans) {
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parseExpressionParser(element, definitionBuilder);
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}
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parseViewFactoryCreator(element, definitionBuilder);
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parseConversionService(element, definitionBuilder);
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}
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private boolean parseEnableManagedBeans(Element element, BeanDefinitionBuilder definitionBuilder) {
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String enableManagedBeans = element.getAttribute(ENABLE_MANAGED_BEANS_ATTRIBUTE);
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if (StringUtils.hasText(enableManagedBeans)) {
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boolean enabled = Boolean.parseBoolean(enableManagedBeans);
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if (enabled) {
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definitionBuilder.addPropertyValue(EXPRESSION_PARSER_PROPERTY, new LegacyJSFELExpressionParser());
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}
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return enabled;
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}
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return false;
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}
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private void parseConversionService(Element element, BeanDefinitionBuilder definitionBuilder) {
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String conversionService = element.getAttribute(CONVERSION_SERVICE_ATTRIBUTE);
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if (StringUtils.hasText(conversionService)) {
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definitionBuilder.addPropertyReference(CONVERSION_SERVICE_PROPERTY, conversionService);
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} else {
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definitionBuilder.addPropertyValue(CONVERSION_SERVICE_PROPERTY, new FacesConversionService());
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}
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}
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private void parseViewFactoryCreator(Element element, BeanDefinitionBuilder definitionBuilder) {
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String viewFactoryCreator = element.getAttribute(VIEW_FACTORY_CREATOR_ATTRIBUTE);
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if (StringUtils.hasText(viewFactoryCreator)) {
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definitionBuilder.addPropertyReference(VIEW_FACTORY_CREATOR_PROPERTY, viewFactoryCreator);
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} else {
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definitionBuilder.addPropertyValue(VIEW_FACTORY_CREATOR_PROPERTY, new JsfViewFactoryCreator());
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}
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}
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private void parseExpressionParser(Element element, BeanDefinitionBuilder definitionBuilder) {
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String expressionParser = element.getAttribute(EXPRESSION_PARSER_ATTRIBUTE);
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if (StringUtils.hasText(expressionParser)) {
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definitionBuilder.addPropertyReference(EXPRESSION_PARSER_PROPERTY, expressionParser);
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} else {
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definitionBuilder.addPropertyValue(EXPRESSION_PARSER_PROPERTY, new WebFlowELExpressionParser());
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}
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}
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}
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<xsd:schema
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xmlns="http://www.springframework.org/schema/faces-config"
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xmlns:xsd="http://www.w3.org/2001/XMLSchema"
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xmlns:beans="http://www.springframework.org/schema/beans"
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targetNamespace="http://www.springframework.org/schema/faces-config"
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elementFormDefault="qualified" attributeFormDefault="unqualified"
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version="2.0">
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<xsd:import namespace="http://www.springframework.org/schema/beans" schemaLocation="http://www.springframework.org/schema/beans/spring-beans-2.0.xsd" />
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<xsd:element name="flow-builder-services">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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Deploys the flow builder services, including the ViewFactoryCreator, ExpressionParser, and ConversionService to
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be used by a flow definition registry.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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<xsd:complexType>
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<xsd:complexContent>
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<xsd:extension base="beans:identifiedType">
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<xsd:attribute name="enable-managed-beans" type="xsd:boolean">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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When this attribute is set to true, a special EL expression parser will be enabled that allows access to JSF-managed beans
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from EL expressions in flow definitions.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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</xsd:attribute>
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<xsd:attribute name="expression-parser" use="optional">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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The idref of the expression parser instance that should be used. If not provided, the default OGNL expression parser
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will be used.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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</xsd:attribute>
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<xsd:attribute name="view-factory-creator" use="optional">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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The idref of the view factory creator that should be used. The view factory creator is specific to the view technology
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being used. If not provided, the default Spring MVC view factory creator will be used.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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</xsd:attribute>
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<xsd:attribute name="conversion-service" use="optional">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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The idref of the conversion service that should be used. If not provided, the default conversion service will be used.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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</xsd:attribute>
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</xsd:extension>
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</xsd:complexContent>
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</xsd:complexType>
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</xsd:element>
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<!--
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<xsd:attribute name="enable-managed-beans" type="xsd:boolean">
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<xsd:annotation>
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<xsd:documentation>
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<![CDATA[
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When this attribute is set to true, a special EL expression parser will be enabled that allows access to JSF-managed beans
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from EL expressions in flow definitions.
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]]>
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</xsd:documentation>
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</xsd:annotation>
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</xsd:attribute>
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-->
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</xsd:schema>
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@@ -31,6 +31,10 @@ public class LegacyJSFELExpressionParser extends ELExpressionParser {
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putContextFactory(MutableAttributeMap.class, new AttributeMapELContextFactory());
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}
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public LegacyJSFELExpressionParser() {
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this(ExpressionFactory.newInstance());
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}
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private static class RequestContextELContextFactory implements ELContextFactory {
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public ELContext getELContext(Object target) {
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List customResolvers = new ArrayList();
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