Examples of ExpressionLanguageExtension

org.mule.api.el.ExpressionLanguageExtension
Interface used to implement extensions to be used with a Mule Expression Language implementation. Imports, variables, aliases and functions can be added to the Expression Language context as required via the methods available in the {@link ExpressionLanguageContext} instance provided. Note: The context provided,is a static context with no message context available. In order to work with per-evaluation context including the message (including it's payload and properties) and flow/session variables then you should implement {@link ExpressionLanguageFunction}'s and make these available in the context. @since 3.3

Examples of org.mule.api.el.ExpressionLanguageExtension

    public void appTakesPrecedenceOverEverything() throws RegistrationException, InitialisationException
    {
        mvel.setAliases(Collections.singletonMap("app", "'other1'"));
        MuleMessage message = new DefaultMuleMessage("", muleContext);
        message.setInvocationProperty("app", "otherb");
        muleContext.getRegistry().registerObject("foo", new ExpressionLanguageExtension()
        {
            @Override
            public void configureContext(ExpressionLanguageContext context)
            {
                context.addVariable("app", "otherc");

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Examples of org.mule.api.el.ExpressionLanguageExtension

    public void messageTakesPrecedenceOverEverything() throws RegistrationException, InitialisationException
    {
        mvel.setAliases(Collections.singletonMap("message", "'other1'"));
        MuleMessage message = new DefaultMuleMessage("", muleContext);
        message.setInvocationProperty("message", "other2");
        muleContext.getRegistry().registerObject("foo", new ExpressionLanguageExtension()
        {
            @Override
            public void configureContext(ExpressionLanguageContext context)
            {
                context.addVariable("message", "other3");

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Examples of org.mule.api.el.ExpressionLanguageExtension

    public void extensionTakesPrecedenceOverAutoResolved()
        throws RegistrationException, InitialisationException
    {
        MuleMessage message = new DefaultMuleMessage("", muleContext);
        message.setInvocationProperty("foo", "other");
        muleContext.getRegistry().registerObject("key", new ExpressionLanguageExtension()
        {
            @Override
            public void configureContext(ExpressionLanguageContext context)
            {
                context.addVariable("foo", "bar");

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Examples of org.mule.api.el.ExpressionLanguageExtension


    @Test
    public void aliasTakesPrecedenceOverAutoResolved() throws RegistrationException, InitialisationException
    {
        mvel.setAliases(Collections.singletonMap("foo", "'bar'"));
        muleContext.getRegistry().registerObject("key", new ExpressionLanguageExtension()
        {
            @Override
            public void configureContext(ExpressionLanguageContext context)
            {
                context.addVariable("foo", "other");

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