Author: maksimkaszynski Date: 2008-03-07 07:20:45 -0500 (Fri, 07 Mar 2008) New Revision: 6621 Added: trunk/framework/impl/src/main/java/org/ajax4jsf/component/EventValueExpression.java Log: Added for JSF 1.2 compat Added: trunk/framework/impl/src/main/java/org/ajax4jsf/component/EventValueExpression.java =================================================================== --- trunk/framework/impl/src/main/java/org/ajax4jsf/component/EventValueExpression.java (rev 0) +++ trunk/framework/impl/src/main/java/org/ajax4jsf/component/EventValueExpression.java 2008-03-07 12:20:45 UTC (rev 6621) @@ -0,0 +1,199 @@ +/** + * + */ +package org.ajax4jsf.component; + +import javax.el.ELContext; +import javax.el.ELException; +import javax.el.ValueExpression; +import javax.faces.component.StateHolder; +import javax.faces.component.UIComponent; +import javax.faces.context.FacesContext; + +import org.ajax4jsf.Messages; +import org.ajax4jsf.renderkit.AjaxRendererUtils; + +/** + * @author Maksim Kaszynski + * + */ +public class EventValueExpression extends ValueExpression implements + StateHolder { + + /** + * + */ + private static final long serialVersionUID = -6583167387542332290L; + + private String componentId; + + /** + * current update component. transient since saved state as component. + */ + transient private AjaxSupport component = null; + + + public EventValueExpression() { + // TODO Auto-generated constructor stub + } + + public EventValueExpression(AjaxSupport component) { + super(); + this.component = component; + } + + /* + * (non-Javadoc) + * + * @see javax.el.Expression#equals(java.lang.Object) + */ + @Override + public boolean equals(Object obj) { + // TODO Auto-generated method stub + return false; + } + + private AjaxSupport getComponent(FacesContext facesContext) + throws ELException { + + if (component == null) { + UIComponent uiComponent = facesContext.getViewRoot().findComponent( + componentId); + if (null != uiComponent && uiComponent instanceof AjaxSupport) { + component = (AjaxSupport) uiComponent; + } else { + throw new ELException(Messages.getMessage( + Messages.COMPONENT_NOT_FOUND, componentId)); + } + + } + + return component; + } + + /* + * (non-Javadoc) + * + * @see javax.el.ValueExpression#getExpectedType() + */ + @Override + public Class<?> getExpectedType() { + return String.class; + } + + /* + * (non-Javadoc) + * + * @see javax.el.Expression#getExpressionString() + */ + @Override + public String getExpressionString() { + // TODO Auto-generated method stub + return null; + } + + /* + * (non-Javadoc) + * + * @see javax.el.ValueExpression#getType(javax.el.ELContext) + */ + @Override + public Class<?> getType(ELContext context) { + return String.class; + } + + /* + * (non-Javadoc) + * + * @see javax.el.ValueExpression#getValue(javax.el.ELContext) + */ + @Override + public Object getValue(ELContext context) { + FacesContext facesContext = FacesContext.getCurrentInstance(); + AjaxSupport component = getComponent(facesContext); + if (((UIComponent) component).isRendered()) { + return component.getEventString(); + + } else { + return null; + } + } + + /* + * (non-Javadoc) + * + * @see javax.el.Expression#hashCode() + */ + @Override + public int hashCode() { + // TODO Auto-generated method stub + return 0; + } + + /* + * (non-Javadoc) + * + * @see javax.el.Expression#isLiteralText() + */ + @Override + public boolean isLiteralText() { + // TODO Auto-generated method stub + return false; + } + + /* + * (non-Javadoc) + * + * @see javax.el.ValueExpression#isReadOnly(javax.el.ELContext) + */ + @Override + public boolean isReadOnly(ELContext context) { + return true; + } + + public boolean isTransient() { + return false; + } + + /* + * (non-Javadoc) + * + * @see javax.faces.component.StateHolder#restoreState(javax.faces.context.FacesContext, + * java.lang.Object) + */ + public void restoreState(FacesContext context, Object state) { + componentId = (String) state; + } + + public Object saveState(FacesContext context) { + if (null == component) { + return componentId; + } else { + return AjaxRendererUtils + .getAbsoluteId((UIComponent) getComponent(context)); + } + } + + /** + * @param component + * the component to set + */ + public void setComponent(AjaxSupport component) { + this.component = component; + } + + public void setTransient(boolean newTransientValue) { + } + + /* + * (non-Javadoc) + * + * @see javax.el.ValueExpression#setValue(javax.el.ELContext, + * java.lang.Object) + */ + @Override + public void setValue(ELContext context, Object value) { + throw new ELException(Messages.getMessage(Messages.EVENT_IS_READ_ONLY)); + } + +}