ContextIntegrationBeanDefinitionParser.java :  » Security » acegi-security » org » acegisecurity » config » Java Open Source

/**
 * 
 */
package org.acegisecurity.config;

import org.acegisecurity.context.HttpSessionContextIntegrationFilter;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.core.Conventions;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;

/**
 * 
 * @author vpuri
 * 
 */
public class ContextIntegrationBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {

  // ~ Static fields/initializers
  // =====================================================================================

  private static final String HTTP_SESSION_CONTEXT_INTEGRATION = "session-context-integration";

  private static final String SESSION_CREATION = "sessionCreation";

  private static final String IF_REQUIRED = "ifRequired";

  private static final String ALWAYS = "always";

  private static final String NEVER = "never";

  private static final String ALLOW_SESSION_CREATION = "allowSessionCreation";

  // ~ Methods
  // ========================================================================================================

  protected Class getBeanClass(Element element) {
    return HttpSessionContextIntegrationFilter.class;
  }

  protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {

    NamedNodeMap attributes = element.getAttributes();

    for (int x = 0; x < attributes.getLength(); x++) {
      Attr attribute = (Attr) attributes.item(x);
      String attributeName = attribute.getLocalName();
      if (!ID_ATTRIBUTE.equals(attributeName)) {
        if (attributeName.equals(SESSION_CREATION)) {
          String sessionCreation = element.getAttribute(SESSION_CREATION);
          createBeanDefinition(builder, sessionCreation);
        }
        else {
          String propertyName = Conventions.attributeNameToPropertyName(attributeName);
          Assert
              .state(StringUtils.hasText(propertyName),
                  "Illegal property name returned from 'extractPropertyName(String)': cannot be null or empty.");
          builder.addPropertyValue(propertyName, attribute.getValue());
        }
      }
    }
  }

  private void createBeanDefinition(BeanDefinitionBuilder builder, String attribute) {
    if (attribute.equals(IF_REQUIRED)) {
      builder.addPropertyValue(ALLOW_SESSION_CREATION, Boolean.TRUE);
    }
    else if (attribute.equals(ALWAYS)) {
      builder.addPropertyValue(ALLOW_SESSION_CREATION, Boolean.TRUE);
    }
    else if (attribute.equals(NEVER)) {
      builder.addPropertyValue(ALLOW_SESSION_CREATION, Boolean.FALSE);
    }
    else {
      createBeanDefinitionWithDefaults();
    }
  }

  protected static RootBeanDefinition createBeanDefinitionWithDefaults() {
    RootBeanDefinition definition = new RootBeanDefinition(HttpSessionContextIntegrationFilter.class);
    definition.getPropertyValues().addPropertyValue(ALLOW_SESSION_CREATION, Boolean.TRUE);
    return definition;
  }
}