content: // =================================================================================================
  // ADOBE SYSTEMS INCORPORATED
  // Copyright 2006 Adobe Systems Incorporated
  // All Rights Reserved
  //
  // NOTICE:  Adobe permits you to use, modify, and distribute this file in accordance with the terms
  // of the Adobe license agreement accompanying it.
  // =================================================================================================
  
  package com.adobe.internal.xmp.impl;
  
  import com.adobe.internal.xmp.XMPConst;
  import com.adobe.internal.xmp.XMPError;
  import com.adobe.internal.xmp.XMPException;
  import com.adobe.internal.xmp.XMPMeta;
  
  
  /**
   * @author  Stefan Makswit
   * @version $Revision$
   * @since   11.08.2006
   */
  class ParameterAsserts implements XMPConst
  {
  	/**
  	 * private constructor
  	 */
  	private ParameterAsserts()
  	{
  		// EMPTY
  	}
  
  
  	/**
  	 * Asserts that an array name is set.
  	 * @param arrayName an array name
  	 * @throws XMPException Array name is null or empty
  	 */
  	public static void assertArrayName(String arrayName) throws XMPException
  	{
  		if (arrayName == null  ||  arrayName.length() == 0)
  		{
  			throw new XMPException("Empty array name", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that a property name is set.
  	 * @param propName a property name or path
  	 * @throws XMPException Property name is null or empty
  	 */
  	public static void assertPropName(String propName) throws XMPException
  	{
  		if (propName == null  ||  propName.length() == 0)
  		{
  			throw new XMPException("Empty property name", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that a schema namespace is set.
  	 * @param schemaNS a schema namespace
  	 * @throws XMPException Schema is null or empty
  	 */
  	public static void assertSchemaNS(String schemaNS) throws XMPException
  	{
  		if (schemaNS == null  ||  schemaNS.length() == 0)
  		{
  			throw new XMPException("Empty schema namespace URI", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that a prefix is set.
  	 * @param prefix a prefix
  	 * @throws XMPException Prefix is null or empty
  	 */
  	public static void assertPrefix(String prefix) throws XMPException
  	{
  		if (prefix == null  ||  prefix.length() == 0)
  		{
  			throw new XMPException("Empty prefix", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that a specific language is set.
  	 * @param specificLang a specific lang
  	 * @throws XMPException Specific language is null or empty
  	 */
  	public static void assertSpecificLang(String specificLang) throws XMPException
  	{
  		if (specificLang == null  ||  specificLang.length() == 0)
  		{
  			throw new XMPException("Empty specific language", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that a struct name is set.
  	 * @param structName a struct name
  	 * @throws XMPException Struct name is null or empty
  	 */
  	public static void assertStructName(String structName) throws XMPException
  	{
  		if (structName == null  ||  structName.length() == 0)
  		{
  			throw new XMPException("Empty array name", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that any string parameter is set.
  	 * @param param any string parameter
  	 * @throws XMPException Thrown if the parameter is null or has length 0.
  	 */
  	public static void assertNotNull(Object param) throws XMPException
  	{
  		if (param == null)
  		{
  			throw new XMPException("Parameter must not be null", XMPError.BADPARAM);
  		}
  		else if ((param instanceof String)  &&  ((String) param).length() == 0)
  		{
  			throw new XMPException("Parameter must not be null or empty", XMPError.BADPARAM);
  		}
  	}
  
  
  	/**
  	 * Asserts that the xmp object is of this implemention
  	 * ({@link XMPMetaImpl}).
  	 * @param xmp the XMP object
  	 * @throws XMPException A wrong implentaion is used.
  	 */
  	public static void assertImplementation(XMPMeta xmp) throws XMPException
  	{
  		if (xmp == null)
  		{
  			throw new XMPException("Parameter must not be null",
  					XMPError.BADPARAM);
  		}
  		else if (!(xmp instanceof XMPMetaImpl))
  		{
  			throw new XMPException("The XMPMeta-object is not compatible with this implementation",
  					XMPError.BADPARAM);
  		}
  	}
  }