trunk/odfdom/src/main/java/org/odftoolkit/odfdom/type/StyleNameRef.java

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* 
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
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*  to you under the Apache License, Version 2.0 (the
*  "License"); you may not use this file except in compliance
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*
*   http://www.apache.org/licenses/LICENSE-2.0
*
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package org.odftoolkit.odfdom.type;

/**
 * This class represents the in OpenDocument format used data type {@odf.datatype styleNameRef}
 */
public class StyleNameRef implements OdfDataType {

	String mStyleNameRef;

	/**
	 * Construct StyleNameRef by the parsing the given string
	 *
	 * @param styleNameRef The String to be parsed into StyleNameRef
	 * @throws IllegalArgumentException if the given argument is not a valid StyleNameRef
	 */
	public StyleNameRef(String styleNameRef) throws IllegalArgumentException {

		if (styleNameRef == null) {
			throw new IllegalArgumentException(
					"parameter can not be null for StyleNameRef");
		}
		if (styleNameRef.length() == 0) {
			mStyleNameRef = styleNameRef;
			return;
		}
		// validate 'NCName' type which is defined in W3C schema
		// http://www.w3.org/TR/xmlschema-2/#NCName
		if (!W3CSchemaType.isValid("NCName", styleNameRef)) {
			throw new IllegalArgumentException(
					"parameter is invalid for datatype StyleNameRef");
		}
		mStyleNameRef = styleNameRef;
	}

	/**
	 * Returns a String Object representing this StyleNameRef's value
	 *
	 * @return return a string representation of the value of this StyleNameRef
	 *         object
	 */
	@Override
	public String toString() {
		return mStyleNameRef;
	}

	/**
	 * Returns a StyleNameRef instance representing the specified String value
	 *
	 * @param stringValue a String value which can construct an OdfStyleNameRef
	 * @return a StyleNameRef instance representing stringValue
	 * @throws IllegalArgumentException
	 */
	public static StyleNameRef valueOf(String stringValue)
			throws IllegalArgumentException {
		return new StyleNameRef(stringValue);
	}

	/**
	 * check if the specified String is a valid {@odf.datatype styleNameRef} data type
	 *
	 * @param stringValue
	 *            the value to be tested
	 * @return true if the value of argument is valid for {@odf.datatype styleNameRef} data type
	 *         false otherwise
	 */
	public static boolean isValid(String stringValue) {
		if (stringValue == null) {
			return false;
		} else if (stringValue.length() == 0) {
			return true;
		} else {
			return W3CSchemaType.isValid("NCName", stringValue);
		}
	}
}