Example usage for javax.naming NamingException getRootCause

Introduction

In this page you can find the example usage for javax.naming NamingException getRootCause.

Prototype

public Throwable getRootCause() 

Source Link

Document

Retrieves the root cause of this NamingException, if any.

Usage

From source file:org.zanata.ZanataInit.java

private static void list(Context ctx, String indent, StringBuffer buffer, boolean verbose) {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    try {/*  w w  w.  ja v a  2  s. c  o m*/
        NamingEnumeration<NameClassPair> ne = ctx.list("");
        while (ne.hasMore()) {
            NameClassPair pair = ne.next();
            String name = pair.getName();
            String className = pair.getClassName();
            boolean recursive = false;
            boolean isLinkRef = false;
            boolean isProxy = false;
            Class<?> c = null;
            try {
                c = loader.loadClass(className);
                if (Context.class.isAssignableFrom(c)) {
                    recursive = true;
                }
                if (LinkRef.class.isAssignableFrom(c)) {
                    isLinkRef = true;
                }
                isProxy = Proxy.isProxyClass(c);
            } catch (ClassNotFoundException cnfe) {
                // If this is a $Proxy* class its a proxy
                if (className.startsWith("$Proxy")) {
                    isProxy = true;
                    // We have to get the class from the binding
                    try {
                        Object p = ctx.lookup(name);
                        c = p.getClass();
                    } catch (NamingException e) {
                        Throwable t = e.getRootCause();
                        if (t instanceof ClassNotFoundException) {
                            // Get the class name from the exception msg
                            String msg = t.getMessage();
                            if (msg != null) {
                                // Reset the class name to the CNFE class
                                className = msg;
                            }
                        }
                    }
                }
            }
            buffer.append(indent).append(" +- ").append(name);
            // Display reference targets
            if (isLinkRef) {
                // Get the
                try {
                    Object obj = ctx.lookupLink(name);
                    LinkRef link = (LinkRef) obj;
                    buffer.append("[link -> ");
                    buffer.append(link.getLinkName());
                    buffer.append(']');
                } catch (Throwable t) {
                    buffer.append("invalid]");
                }
            }
            // Display proxy interfaces
            if (isProxy) {
                buffer.append(" (proxy: ").append(pair.getClassName());
                if (c != null) {
                    Class<?>[] ifaces = c.getInterfaces();
                    buffer.append(" implements ");
                    for (Class<?> iface : ifaces) {
                        buffer.append(iface);
                        buffer.append(',');
                    }
                    buffer.setCharAt(buffer.length() - 1, ')');
                } else {
                    buffer.append(" implements ").append(className).append(")");
                }
            } else if (verbose) {
                buffer.append(" (class: ").append(pair.getClassName()).append(")");
            }
            buffer.append('\n');
            if (recursive) {
                try {
                    Object value = ctx.lookup(name);
                    if (value instanceof Context) {
                        Context subctx = (Context) value;
                        list(subctx, indent + " |  ", buffer, verbose);
                    } else {
                        buffer.append(indent).append(" |   NonContext: ").append(value);
                        buffer.append('\n');
                    }
                } catch (Throwable t) {
                    buffer.append("Failed to lookup: ").append(name).append(", errmsg=").append(t.getMessage());
                    buffer.append('\n');
                }
            }
        }
        ne.close();
    } catch (NamingException ne) {
        buffer.append("error while listing context ").append(ctx.toString()).append(": ")
                .append(ne.toString(true));
    }
}

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