Example usage for org.apache.commons.lang.enums EnumUtils iterator

Introduction

In this page you can find the example usage for org.apache.commons.lang.enums EnumUtils iterator.

Prototype

public static Iterator iterator(Class enumClass) 

Source Link

Document

Gets an Iterator over the Enum objects in an Enum class.

The iterator is in the order that the objects were created (source code order).

If the requested class has no enum objects an empty Iterator is returned.

Usage

From source file:org.apache.cocoon.forms.datatype.EnumSelectionList.java

public void generateSaxFragment(ContentHandler contentHandler, Locale locale) throws SAXException {
    try {/*from w  w  w  .ja  va2  s . c o m*/
        contentHandler.startElement(FormsConstants.INSTANCE_NS, SELECTION_LIST_EL,
                FormsConstants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL, XMLUtils.EMPTY_ATTRIBUTES);
        // Create void element
        if (nullable) {
            AttributesImpl voidAttrs = new AttributesImpl();
            voidAttrs.addCDATAAttribute("value", "");
            contentHandler.startElement(FormsConstants.INSTANCE_NS, ITEM_EL,
                    FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL, voidAttrs);
            if (this.nullText != null) {
                contentHandler.startElement(FormsConstants.INSTANCE_NS, LABEL_EL,
                        FormsConstants.INSTANCE_PREFIX_COLON + LABEL_EL, XMLUtils.EMPTY_ATTRIBUTES);
                contentHandler.startElement(FormsConstants.I18N_NS, TEXT_EL,
                        FormsConstants.I18N_PREFIX_COLON + TEXT_EL, XMLUtils.EMPTY_ATTRIBUTES);
                contentHandler.characters(nullText.toCharArray(), 0, nullText.length());
                contentHandler.endElement(FormsConstants.I18N_NS, TEXT_EL,
                        FormsConstants.I18N_PREFIX_COLON + TEXT_EL);
                contentHandler.endElement(FormsConstants.INSTANCE_NS, LABEL_EL,
                        FormsConstants.INSTANCE_PREFIX_COLON + LABEL_EL);
            }
            contentHandler.endElement(FormsConstants.INSTANCE_NS, ITEM_EL,
                    FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL);
        }
        // Test if we have an apache enum class
        boolean apacheEnumDone = false;
        if (Enum.class.isAssignableFrom(clazz)) {
            Iterator iter = EnumUtils.iterator(clazz);
            if (iter != null) {
                apacheEnumDone = true;
                while (iter.hasNext()) {
                    Enum element = (Enum) iter.next();
                    String stringValue = clazz.getName() + "." + element.getName();
                    generateItem(contentHandler, stringValue);
                }
            }
        }
        // If it's not an apache enum or we didn't manage to read the enum list, then proceed with common method.
        if (!apacheEnumDone) {
            Field fields[] = clazz.getDeclaredFields();
            for (int i = 0; i < fields.length; ++i) {
                int mods = fields[i].getModifiers();
                if (Modifier.isPublic(mods) && Modifier.isStatic(mods) && Modifier.isFinal(mods)
                        && fields[i].get(null).getClass().equals(clazz)) {
                    String stringValue = clazz.getName() + "." + fields[i].getName();
                    generateItem(contentHandler, stringValue);
                }
            }
        }
        // End the selection-list
        contentHandler.endElement(FormsConstants.INSTANCE_NS, SELECTION_LIST_EL,
                FormsConstants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL);
    } catch (Exception e) {
        throw new SAXException("Got exception trying to get enum's values", e);
    }
}

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