public static TldMetaData parse(XMLStreamReader reader) throws XMLStreamException { reader.require(START_DOCUMENT, null, null); // Read until the first start element Version version = null; while (reader.hasNext() && reader.next() != START_ELEMENT) { if (reader.getEventType() == DTD) { String dtdLocation = readDTDLocation(reader); if (dtdLocation != null) { version = Location.getVersion(dtdLocation); } if (version == null) { // DTD->getText() is incomplete and not parsable with Xerces from Sun JDK 6, // so assume TLD 1.2 version = Version.TLD_1_2; } } } String schemaLocation = readSchemaLocation(reader); if (schemaLocation != null) { version = Location.getVersion(schemaLocation); } if (version == null) { // Look at the version attribute String versionString = null; final int count = reader.getAttributeCount(); for (int i = 0; i < count; i++) { if (attributeHasNamespace(reader, i)) { continue; } final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i)); if (attribute == Attribute.VERSION) { versionString = reader.getAttributeValue(i); } } if ("2.0".equals(versionString)) { version = Version.TLD_2_0; } else if ("2.1".equals(versionString)) { version = Version.TLD_2_1; } } if (version == null) { // It is likely an error to not have a version at this point though version = Version.TLD_2_1; } TldMetaData tld = new TldMetaData(); // Handle attributes final int count = reader.getAttributeCount(); for (int i = 0; i < count; i++) { final String value = reader.getAttributeValue(i); if (attributeHasNamespace(reader, i)) { continue; } final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i)); switch (attribute) { case ID: { tld.setId(value); break; } case VERSION: { tld.setVersion(value); break; } default: throw unexpectedAttribute(reader, i); } } DescriptionGroupMetaData descriptionGroup = new DescriptionGroupMetaData(); // Handle elements while (reader.hasNext() && reader.nextTag() != END_ELEMENT) { if (DescriptionGroupMetaDataParser.parse(reader, descriptionGroup)) { if (tld.getDescriptionGroup() == null) { tld.setDescriptionGroup(descriptionGroup); } continue; } final Element element = Element.forName(reader.getLocalName()); switch (element) { case TLIB_VERSION: tld.setTlibVersion(getElementText(reader)); break; case TLIBVERSION: if (version == Version.TLD_1_1) { tld.setTlibVersion(getElementText(reader)); } else if (version == Version.TLD_1_2) { // Allow invalid legacy element tld.setTlibVersion(getElementText(reader)); } else { throw unexpectedElement(reader); } break; case SHORT_NAME: tld.setShortName(getElementText(reader)); break; case SHORTNAME: if (version == Version.TLD_1_1) { tld.setShortName(getElementText(reader)); } else if (version == Version.TLD_1_2) { // Allow invalid legacy element tld.setShortName(getElementText(reader)); } else { throw unexpectedElement(reader); } break; case JSPVERSION: if (version == Version.TLD_1_1) { tld.setJspVersion(getElementText(reader)); } else if (version == Version.TLD_1_2) { // Allow invalid legacy element tld.setJspVersion(getElementText(reader)); } else { throw unexpectedElement(reader); } break; case JSP_VERSION: if (version == Version.TLD_1_2) { tld.setJspVersion(getElementText(reader)); } else if (version != Version.TLD_1_1) { // This is not valid, but still being used in 2.0+ TLDs tld.setJspVersion(getElementText(reader)); } else { throw unexpectedElement(reader); } break; case INFO: if (version == Version.TLD_1_1) { getElementText(reader);//ignore } else if (version == Version.TLD_1_2) { // Ignore invalid legacy element getElementText(reader); } else { throw unexpectedElement(reader); } break; case SMALL_ICON: if (version == Version.TLD_1_2) { getElementText(reader);//ignore } else { throw unexpectedElement(reader); } break; case LARGE_ICON: if (version == Version.TLD_1_2) { getElementText(reader);//ignore } else { throw unexpectedElement(reader); } break; case URI: tld.setUri(getElementText(reader)); break; case VALIDATOR: tld.setValidator(ValidatorMetaDataParser.parse(reader)); break; case LISTENER: List listeners = tld.getListeners(); if (listeners == null) { listeners = new ArrayList(); tld.setListeners(listeners); } listeners.add(ListenerMetaDataParser.parse(reader)); break; case TAG: List tags = tld.getTags(); if (tags == null) { tags = new ArrayList(); tld.setTags(tags); } tags.add(TagMetaDataParser.parse(reader, version)); break; case TAG_FILE: List tagfiles = tld.getTagFiles(); if (tagfiles == null) { tagfiles = new ArrayList(); tld.setTagFiles(tagfiles); } tagfiles.add(TagFileMetaDataParser.parse(reader)); break; case FUNCTION: List functions = tld.getFunctions(); if (functions == null) { functions = new ArrayList(); tld.setFunctions(functions); } functions.add(FunctionMetaDataParser.parse(reader)); break; case TAGLIB_EXTENSION: List extensions = tld.getTaglibExtensions(); if (extensions == null) { extensions = new ArrayList(); tld.setTaglibExtensions(extensions); } extensions.add(TldExtensionMetaDataParser.parse(reader)); break; default: throw unexpectedElement(reader); } } return tld; }

How to use setFunctionsmethodin org.jboss.metadata.web.spec.TldMetaData

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setFunctions
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org.jboss.metadata.web.spec.TldMetaData