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flow EL resolver

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This commit is contained in:
Keith Donald
2008-04-21 15:30:30 +00:00
parent 0ff87d3088
commit b9f15565da
6 changed files with 109 additions and 71 deletions
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1
spring-faces/src/main/java/org/springframework/faces/webflow/FlowPropertyResolver.java
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@@ -20,6 +20,7 @@ import javax.faces.el.PropertyResolver;
import org.springframework.binding.expression.el.MapAdaptableELResolver;
import org.springframework.faces.expression.ELDelegatingPropertyResolver;
import org.springframework.webflow.expression.el.FlowResourceELResolver;
/**
* For resolving MapAdaptable properties with JSF 1.1 or >.

71
spring-faces/src/main/java/org/springframework/faces/webflow/FlowResourceELResolver.java
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@@ -1,71 +0,0 @@
package org.springframework.faces.webflow;
import java.util.Iterator;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.el.PropertyNotWritableException;
import org.springframework.context.MessageSource;
import org.springframework.util.StringUtils;
import org.springframework.webflow.execution.RequestContextHolder;
public class FlowResourceELResolver extends ELResolver {
private String MESSAGE_SOURCE_KEY = "resourceBundle";
public Class getCommonPropertyType(ELContext context, Object base) {
return Object.class;
}
public Iterator getFeatureDescriptors(ELContext context, Object base) {
return null;
}
public Class getType(ELContext context, Object base, Object property) {
if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
context.setPropertyResolved(true);
return MessageSource.class;
} else if (base != null && base instanceof MessageSource) {
MessageSource messageSource = (MessageSource) base;
String message = messageSource.getMessage(property.toString(), null, RequestContextHolder
.getRequestContext().getExternalContext().getLocale());
if (StringUtils.hasText(message)) {
context.setPropertyResolved(true);
return String.class;
}
}
return null;
}
public Object getValue(ELContext context, Object base, Object property) {
if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
context.setPropertyResolved(true);
return RequestContextHolder.getRequestContext().getActiveFlow().getApplicationContext();
} else if (base != null && base instanceof MessageSource) {
MessageSource messageSource = (MessageSource) base;
String message = messageSource.getMessage(property.toString(), null, RequestContextHolder
.getRequestContext().getExternalContext().getLocale());
if (StringUtils.hasText(message)) {
context.setPropertyResolved(true);
return message;
}
}
return null;
}
public boolean isReadOnly(ELContext context, Object base, Object property) {
if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
context.setPropertyResolved(true);
return true;
}
return false;
}
public void setValue(ELContext context, Object base, Object property, Object value) {
if (base == null && MESSAGE_SOURCE_KEY.equals(property)) {
throw new PropertyNotWritableException("The flow's MessageSource is not writable.");
}
}
}

1
spring-faces/src/main/java/org/springframework/faces/webflow/FlowVariableResolver.java
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@@ -19,6 +19,7 @@ import javax.el.CompositeELResolver;
import javax.faces.el.VariableResolver;
import org.springframework.faces.expression.ELDelegatingVariableResolver;
import org.springframework.webflow.expression.el.FlowResourceELResolver;
import org.springframework.webflow.expression.el.ImplicitFlowVariableELResolver;
import org.springframework.webflow.expression.el.RequestContextELResolver;
import org.springframework.webflow.expression.el.ScopeSearchingELResolver;

2
spring-faces/src/main/java/org/springframework/faces/webflow/JsfManagedBeanAwareELExpressionParser.java
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@@ -29,6 +29,7 @@ import org.springframework.binding.expression.el.ELContextFactory;
import org.springframework.binding.expression.el.ELExpressionParser;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.expression.el.ActionMethodELResolver;
import org.springframework.webflow.expression.el.FlowResourceELResolver;
import org.springframework.webflow.expression.el.ImplicitFlowVariableELResolver;
import org.springframework.webflow.expression.el.RequestContextELResolver;
import org.springframework.webflow.expression.el.ScopeSearchingELResolver;
@@ -52,6 +53,7 @@ public class JsfManagedBeanAwareELExpressionParser extends ELExpressionParser {
RequestContext context = (RequestContext) target;
List customResolvers = new ArrayList();
customResolvers.add(new RequestContextELResolver(context));
customResolvers.add(new FlowResourceELResolver(context));
customResolvers.add(new ImplicitFlowVariableELResolver(context));
customResolvers.add(new ScopeSearchingELResolver(context));
customResolvers.add(new SpringBeanWebFlowELResolver(context));

104
spring-webflow/src/main/java/org/springframework/webflow/expression/el/FlowResourceELResolver.java Normal file
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@@ -0,0 +1,104 @@
package org.springframework.webflow.expression.el;
import java.util.Iterator;
import java.util.Locale;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.el.PropertyNotWritableException;
import org.springframework.context.MessageSource;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.execution.RequestContextHolder;
/**
* Custom EL resolver that resolves the messages from the active flow's {@link MessageSource}. The message source is
* indexed under the key <code>resourceBundle</code>. To access a message, specify its key e.g.
* <code>resourceBundle.myMessage</code>.
*
* @author Jeremy Grelle
*/
public class FlowResourceELResolver extends ELResolver {
private String RESOURCE_BUNDLE_KEY = "resourceBundle";
private RequestContext requestContext;
public FlowResourceELResolver() {
}
public FlowResourceELResolver(RequestContext requestContext) {
this.requestContext = requestContext;
}
public Class getCommonPropertyType(ELContext context, Object base) {
if (base == null) {
return MessageSource.class;
} else if (base instanceof MessageSource) {
return String.class;
} else {
return null;
}
}
public Iterator getFeatureDescriptors(ELContext context, Object base) {
return null;
}
public Class getType(ELContext context, Object base, Object property) {
if (base == null && RESOURCE_BUNDLE_KEY.equals(property)) {
context.setPropertyResolved(true);
return MessageSource.class;
} else if (base instanceof MessageSource) {
MessageSource messageSource = (MessageSource) base;
String message = messageSource.getMessage(property.toString(), null, null, getLocale());
if (message != null) {
context.setPropertyResolved(true);
return String.class;
}
}
return null;
}
public Object getValue(ELContext context, Object base, Object property) {
if (base == null && RESOURCE_BUNDLE_KEY.equals(property)) {
context.setPropertyResolved(true);
return getMessageSource();
} else if (base instanceof MessageSource) {
MessageSource messageSource = (MessageSource) base;
String message = messageSource.getMessage(property.toString(), null, null, getLocale());
if (message != null) {
context.setPropertyResolved(true);
return message;
}
}
return null;
}
public boolean isReadOnly(ELContext context, Object base, Object property) {
if (base == null && RESOURCE_BUNDLE_KEY.equals(property)) {
context.setPropertyResolved(true);
return true;
}
return false;
}
public void setValue(ELContext context, Object base, Object property, Object value) {
if (base == null && RESOURCE_BUNDLE_KEY.equals(property)) {
throw new PropertyNotWritableException("The flow's MessageSource is not writable.");
}
}
protected Locale getLocale() {
return getRequestContext().getExternalContext().getLocale();
}
protected MessageSource getMessageSource() {
return getRequestContext().getActiveFlow().getApplicationContext();
}
protected RequestContext getRequestContext() {
return requestContext != null ? requestContext : RequestContextHolder.getRequestContext();
}
}

1
spring-webflow/src/main/java/org/springframework/webflow/expression/el/WebFlowELExpressionParser.java
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@@ -54,6 +54,7 @@ public class WebFlowELExpressionParser extends ELExpressionParser {
RequestContext context = (RequestContext) target;
List customResolvers = new ArrayList();
customResolvers.add(new RequestContextELResolver(context));
customResolvers.add(new FlowResourceELResolver(context));
customResolvers.add(new ImplicitFlowVariableELResolver(context));
customResolvers.add(new ScopeSearchingELResolver(context));
customResolvers.add(new SpringBeanWebFlowELResolver(context));