Example usage for org.w3c.dom DOMErrorHandler DOMErrorHandler

Introduction

In this page you can find the example usage for org.w3c.dom DOMErrorHandler DOMErrorHandler.

Prototype

DOMErrorHandler

Source Link

Usage

From source file:org.alfresco.web.forms.xforms.SchemaUtil.java

public static XSModel parseSchema(final Document schemaDocument, final boolean failOnError)
        throws FormBuilderException {
    try {//w ww.  j  av  a  2  s .  c  o m
        // Get DOM Implementation using DOM Registry
        System.setProperty(DOMImplementationRegistry.PROPERTY,
                "org.apache.xerces.dom.DOMXSImplementationSourceImpl");

        final DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();

        final DOMImplementationLS lsImpl = (DOMImplementationLS) registry
                .getDOMImplementation("XML 1.0 LS 3.0");
        if (lsImpl == null) {
            throw new FormBuilderException("unable to create DOMImplementationLS using " + registry);
        }
        final LSInput in = lsImpl.createLSInput();
        in.setStringData(XMLUtil.toString(schemaDocument));

        final XSImplementation xsImpl = (XSImplementation) registry.getDOMImplementation("XS-Loader");
        final XSLoader schemaLoader = xsImpl.createXSLoader(null);
        final DOMConfiguration config = (DOMConfiguration) schemaLoader.getConfig();
        final LinkedList<DOMError> errors = new LinkedList<DOMError>();
        config.setParameter("error-handler", new DOMErrorHandler() {
            public boolean handleError(final DOMError domError) {
                errors.add(domError);
                return true;
            }
        });

        final XSModel result = schemaLoader.load(in);
        if (failOnError && errors.size() != 0) {
            final HashSet<String> messages = new HashSet<String>();
            StringBuilder message = null;
            for (DOMError e : errors) {
                message = new StringBuilder();
                final DOMLocator dl = e.getLocation();
                if (dl != null) {
                    message.append("at line ").append(dl.getLineNumber()).append(" column ")
                            .append(dl.getColumnNumber());
                    if (dl.getRelatedNode() != null) {
                        message.append(" node ").append(dl.getRelatedNode().getNodeName());
                    }
                    message.append(": ").append(e.getMessage());
                }
                messages.add(message.toString());
            }

            message = new StringBuilder();
            message.append(messages.size() > 1 ? "errors" : "error").append(" parsing schema: \n");
            for (final String s : messages) {
                message.append(s).append("\n");
            }

            throw new FormBuilderException(message.toString());
        }

        if (result == null) {
            throw new FormBuilderException("invalid schema");
        }
        return result;
    } catch (ClassNotFoundException x) {
        throw new FormBuilderException(x);
    } catch (InstantiationException x) {
        throw new FormBuilderException(x);
    } catch (IllegalAccessException x) {
        throw new FormBuilderException(x);
    }
}

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