Package de.odysseus.el.util

Examples of de.odysseus.el.util.SimpleContext$Functions

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  /**
   * Usage example.
   */
  public static void main(String[] args) throws SAXException, IOException {
    // create our expression context
    ELContext context = new SimpleContext();
    // set value for top-level property "home"
    context.getELResolver().setValue(context, null, "home", "/foo/bar");
    // create our filtered reader
    XMLReader reader = new XMELFilter(XMLReaderFactory.createXMLReader(), context);
    // simple test content handler to print elements and attributes to stdout
    reader.setContentHandler(new DefaultHandler() {
      @Override
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    // create our resolver
    ELResolver resolver = new MethodResolver(method);

    // create our context
    ELContext context = new SimpleContext(resolver);

    // let's go...
    ValueExpression e = null;
   
    e = f.createValueExpression(context, "${'foo'.matches('foo|bar')}", boolean.class);
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  /**
   * Usage example.
   */
  public static void main(String[] args) throws SAXException, IOException {
    // create our expression context
    ELContext context = new SimpleContext();
    // set value for top-level property "home"
    context.getELResolver().setValue(context, null, "home", "/foo/bar");
    // create our filtered reader
    XMLReader reader = new AttributesFilter(XMLReaderFactory.createXMLReader(), context);
    // simple test content handler to print elements and attributes to stdout
    reader.setContentHandler(new DefaultHandler() {
      @Override
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  /**
   * Usage example.
   */
  public static void main(String[] args) throws SAXException, IOException {
    // create our expression context
    ELContext context = new SimpleContext();
    // set value for top-level property "home"
    context.getELResolver().setValue(context, null, "home", "/foo/bar");
    // create our filtered reader
    XMLReader reader = new TextFilter(XMLReaderFactory.createXMLReader(), context);
    // simple test content handler to print elements and attributes to stdout
    reader.setContentHandler(new DefaultHandler() {
      @Override
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    // create our factory which uses our customized builder
    ExpressionFactory f = new ExpressionFactoryImpl(new TreeStore(builder, new Cache(10)));

    // create our context
    ELContext context = new SimpleContext();

    // create our expression we want to evaluate
    ValueExpression e = f.createValueExpression(context, "${map[null]}", String.class);

    // create a map containing a value for key <code>null</code> and make it available
    Map<String, String> map = new HashMap<String, String>();
    map.put(null, "foo");
    context.getELResolver().setValue(context, null, "map", map);

    // let's go...
    System.out.println(e.getValue(context)); // --> "foo"
  }
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    System.setProperty("javax.el.varArgs", "true");   
    ExpressionFactory f = new ExpressionFactoryImpl(System.getProperties());

    // create our context with function "vararg:format"
    Method method = String.class.getMethod("format", new Class[]{String.class, Object[].class});
    SimpleContext context = new SimpleContext();
    context.setFunction("varargs", "format", method);

    // our expression we want to evaluate
    String expression = "${varargs:format('Hey %s','Joe')}";

    // let's go...
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*/
public class Calculator {
  public static void main(String[] args) throws NoSuchMethodException, IOException {
    ExpressionFactory factory = new ExpressionFactoryImpl();

    SimpleContext context = new SimpleContext();

    // variables e, pi
    context.setVariable("e", factory.createValueExpression(Math.E, double.class));
    context.setVariable("pi", factory.createValueExpression(Math.PI, double.class));
   
    // functions sin, cos, tan, exp, log, abs, sqrt, min, max, pow
    context.setFunction("", "sin", Math.class.getMethod("sin", double.class));
    context.setFunction("", "cos", Math.class.getMethod("cos", double.class));
    context.setFunction("", "tan", Math.class.getMethod("tan", double.class));
    context.setFunction("", "exp", Math.class.getMethod("exp", double.class));
    context.setFunction("", "log", Math.class.getMethod("log", double.class));
    context.setFunction("", "abs", Math.class.getMethod("abs", double.class));
    context.setFunction("", "sqrt", Math.class.getMethod("sqrt", double.class));
    context.setFunction("", "min", Math.class.getMethod("min", double.class, double.class));
    context.setFunction("", "max", Math.class.getMethod("max", double.class, double.class));
    context.setFunction("", "pow", Math.class.getMethod("pow", double.class, double.class));

    // print out the rules of the game...
    System.out.println("> Enter one expression per line (without \"${\" and \"}\"). An expressions matching");
    System.out.println("> \"m[0-9]*\" saves the previous evaluation result to \"memory\". Other expressions");
    System.out.println("> are simply evaluated. Functions are sin, cos, tan, exp, log, abs, sqrt, min,");
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    }
    NodePrinter.dump(out, tree.getRoot());
    if (!tree.getFunctionNodes().iterator().hasNext() && !tree.getIdentifierNodes().iterator().hasNext()) {
      out.print(">> ");
      try {
        out.println(tree.getRoot().getValue(new Bindings(null, null), new SimpleContext(), null));
      } catch (ELException e) {
        out.println(e.getMessage());
      }
    }
    out.flush();
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        "${'abab' matches '(ba)*'}",
        "${'abab' ~ '(ab)*'}",
        "${'abab' ~ '(ba)*'}"
    };

    SimpleContext context = new SimpleContext();
    for (String expression : expressions) {
      ValueExpression e = factory.createValueExpression(context, expression, boolean.class);
      System.out.println(expression + " --> " + e.getValue(context));
    }
  }
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  SimpleContext context;
  TreeStore store = new TreeStore(new Builder(), null);
 
  @Override
  protected void setUp() throws Exception {
    context = new SimpleContext(new SimpleResolver(new BeanELResolver()));
    context.getELResolver().setValue(context, null, "base", this);

    // variables var_long_1, var_long_2
    context.setVariable("var_long_1", new TreeValueExpression(store, null, null, null, "${1}", long.class));
    context.setVariable("var_long_2", new TreeValueExpression(store, null, null, null, "${1}", long.class));
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Related Classes of de.odysseus.el.util.SimpleContext$Functions

  • com.opengamma.financial.expression.ELExpressionParser
  • de.odysseus.el.ExpressionFactoryImplTest
  • de.odysseus.el.samples.calculator.Calculator
  • de.odysseus.el.samples.experimental.SyntaxExtension
  • de.odysseus.el.samples.extensions.MethodInvocations
  • de.odysseus.el.samples.extensions.NullProperties
  • de.odysseus.el.samples.extensions.VarArgs
  • de.odysseus.el.samples.xml.sax.AttributesFilter
  • de.odysseus.el.samples.xml.sax.TextFilter
  • de.odysseus.el.samples.xml.sax.XMELFilter
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