Java 类javax.servlet.jsp.el.ExpressionEvaluator 实例源码

/**
 * Attempts to get the PageContext object stashed away in the DispatcherHelper
 *  and use it to generate an ExpressionEvaluator.
 *
 * @return an ExpressionEvaluator if possible, or null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    final PageContext context = DispatcherHelper.getPageContext();

    if (context == null) {
        log.error("Could not process expression based validation. It would seem that ",
                  "your servlet container is being mean and will not let the dispatcher ",
                  "servlet manufacture a PageContext object through the JSPFactory. The ",
                  "result of this is that expression validation will be disabled. Sorry.");
        return null;
    }
    else {
        return context.getExpressionEvaluator();
    }
}

/**
 * Attempts to get the PageContext object stashed away in the DispatcherHelper
 *  and use it to generate an ExpressionEvaluator.
 *
 * @return an ExpressionEvaluator if possible, or null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    final PageContext context = DispatcherHelper.getPageContext();

    if (context == null) {
        log.error("Could not process expression based validation. It would seem that ",
                  "your servlet container is being mean and will not let the dispatcher ",
                  "servlet manufacture a PageContext object through the JSPFactory. The ",
                  "result of this is that expression validation will be disabled. Sorry.");
        return null;
    }
    else {
        return context.getExpressionEvaluator();
    }
}

/**
 * Attempts to get the PageContext object stashed away in the DispatcherHelper
 *  and use it to generate an ExpressionEvaluator.
 *
 * @return an ExpressionEvaluator if possible, or null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    final PageContext context = DispatcherHelper.getPageContext();

    if (context == null) {
        log.error("Could not process expression based validation. It would seem that ",
                  "your servlet container is being mean and will not let the dispatcher ",
                  "servlet manufacture a PageContext object through the JSPFactory. The ",
                  "result of this is that expression validation will be disabled. Sorry.");
        return null;
    }
    else {
        return context.getExpressionEvaluator();
    }
}

/**
 * Attempts to create an expression evaluator by reflecting to find the implementation
 * in the apache commons-el project.
 *
 * @return an instance of ExpressionEvaluatorImpl if it can, null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    try {
        return (ExpressionEvaluator)
                ReflectUtil.findClass(COMMONS_CLASS).newInstance();
    }
    catch (Exception e) {
        return null;
    }
}

/**
 * Attempts to create an expression evaluator by reflecting to find the implementation
 * in the apache commons-el project.
 *
 * @return an instance of ExpressionEvaluatorImpl if it can, null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    try {
        return (ExpressionEvaluator)
                ReflectUtil.findClass(COMMONS_CLASS).newInstance();
    }
    catch (Exception e) {
        return null;
    }
}

/**
 * Attempts to create an expression evaluator by reflecting to find the implementation
 * in the apache commons-el project.
 *
 * @return an instance of ExpressionEvaluatorImpl if it can, null otherwise
 */
@Override
protected ExpressionEvaluator getEvaluator() {
    try {
        return (ExpressionEvaluator)
                ReflectUtil.findClass(COMMONS_CLASS).newInstance();
    }
    catch (Exception e) {
        return null;
    }
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

public ExpressionEvaluator getExpressionEvaluator() {
    return null;
}

public ExpressionEvaluator getExpressionEvaluator() {
return invokingJspCtxt.getExpressionEvaluator();
   }

@Override
public ExpressionEvaluator getExpressionEvaluator() {
    throw new RuntimeException("Not implemented");
}

@Override
public ExpressionEvaluator getExpressionEvaluator() 
{       
    return null;
}

public ExpressionEvaluator getExpressionEvaluator()
{
    // TODO Auto-generated method stub
    return null;
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {
  throw new UnsupportedOperationException();
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {
    // TODO Auto-generated method stub
    return null;
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {
    throw new RuntimeException("not supported!");
}

public ExpressionEvaluator getExpressionEvaluator() {
    return null;  //To change body of implemented methods use File | Settings | File Templates.
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {
    // TODO Auto-generated method stub
    return null;
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {
    return eval;
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new MockExpressionEvaluator(this);
}

public ExpressionEvaluator getExpressionEvaluator() {
    return new MockExpressionEvaluator(this);
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

public ExpressionEvaluator getExpressionEvaluator() {
return invokingJspCtxt.getExpressionEvaluator();
   }

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

@Override
public ExpressionEvaluator getExpressionEvaluator() {

    return null;
}

@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return invokingJspCtxt.getExpressionEvaluator();
}

/**
 * Provides programmatic access to the ExpressionEvaluator. The JSP
 * Container must return a valid instance of an ExpressionEvaluator that can
 * parse EL expressions.
 */
@Override
@Deprecated
public ExpressionEvaluator getExpressionEvaluator() {
    return new ExpressionEvaluatorImpl(this.applicationContext.getExpressionFactory());
}

@Override
public ExpressionEvaluator getExpressionEvaluator()
{
  throw new UnsupportedOperationException();
}

@Override
public ExpressionEvaluator getExpressionEvaluator()
{
    throw new UnsupportedOperationException("implement me");
}

@Override
public ExpressionEvaluator getExpressionEvaluator() 
{       
    return null;
}