Example usage for org.springframework.beans.factory.xml NamespaceHandler init

Introduction

In this page you can find the example usage for org.springframework.beans.factory.xml NamespaceHandler init.

Prototype

void init();

Source Link

Document

Invoked by the DefaultBeanDefinitionDocumentReader after construction but before any custom elements are parsed.

Usage

From source file:org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.java

/**
 * Locate the {@link NamespaceHandler} for the supplied namespace URI
 * from the configured mappings./*from www .java 2  s  .  c  om*/
 * @param namespaceUri the relevant namespace URI
 * @return the located {@link NamespaceHandler}, or {@code null} if none found
 */
@Override
@Nullable
public NamespaceHandler resolve(String namespaceUri) {
    Map<String, Object> handlerMappings = getHandlerMappings();
    Object handlerOrClassName = handlerMappings.get(namespaceUri);
    if (handlerOrClassName == null) {
        return null;
    } else if (handlerOrClassName instanceof NamespaceHandler) {
        return (NamespaceHandler) handlerOrClassName;
    } else {
        String className = (String) handlerOrClassName;
        try {
            Class<?> handlerClass = ClassUtils.forName(className, this.classLoader);
            if (!NamespaceHandler.class.isAssignableFrom(handlerClass)) {
                throw new FatalBeanException("Class [" + className + "] for namespace [" + namespaceUri
                        + "] does not implement the [" + NamespaceHandler.class.getName() + "] interface");
            }
            NamespaceHandler namespaceHandler = (NamespaceHandler) BeanUtils.instantiateClass(handlerClass);
            namespaceHandler.init();
            handlerMappings.put(namespaceUri, namespaceHandler);
            return namespaceHandler;
        } catch (ClassNotFoundException ex) {
            throw new FatalBeanException("Could not find NamespaceHandler class [" + className
                    + "] for namespace [" + namespaceUri + "]", ex);
        } catch (LinkageError err) {
            throw new FatalBeanException("Unresolvable class definition for NamespaceHandler class ["
                    + className + "] for namespace [" + namespaceUri + "]", err);
        }
    }
}

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