xmpmetaimpl.java

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				arrayNode.getOptions().setArrayAltText(true);
			}
			else
			{
				throw new XMPException(
					"Specified property is no alt-text array", XMPError.BADXPATH);
			}
		}

		// Make sure the x-default item, if any, is first.
		boolean haveXDefault = false;
		XMPNode xdItem = null;

		for (Iterator it = arrayNode.iterateChildren(); it.hasNext();)
		{
			XMPNode currItem = (XMPNode) it.next();
			if (!currItem.hasQualifier()
					|| !XMPConst.XML_LANG.equals(currItem.getQualifier(1).getName()))
			{
				throw new XMPException("Language qualifier must be first", XMPError.BADXPATH);
			}
			else if (XMPConst.X_DEFAULT.equals(currItem.getQualifier(1).getValue()))
			{
				xdItem = currItem;
				haveXDefault = true;
				break;
			}
		}

		// Moves x-default to the beginning of the array
		if (xdItem != null  &&  arrayNode.getChildrenLength() > 1)
		{
			arrayNode.removeChild(xdItem);
			arrayNode.addChild(1, xdItem);
		}

		// Find the appropriate item.
		// chooseLocalizedText will make sure the array is a language
		// alternative.
		Object[] result = XMPNodeUtils.chooseLocalizedText(arrayNode, genericLang, specificLang);
		int match = ((Integer) result[0]).intValue();
		XMPNode itemNode = (XMPNode) result[1];

		boolean specificXDefault = XMPConst.X_DEFAULT.equals(specificLang);

		switch (match)
		{
		case XMPNodeUtils.CLT_NO_VALUES:

			// Create the array items for the specificLang and x-default, with
			// x-default first.
			XMPNodeUtils.appendLangItem(arrayNode, XMPConst.X_DEFAULT, itemValue);
			haveXDefault = true;
			if (!specificXDefault)
			{
				XMPNodeUtils.appendLangItem(arrayNode, specificLang, itemValue);
			}
			break;

		case XMPNodeUtils.CLT_SPECIFIC_MATCH:

			if (!specificXDefault)
			{
				// Update the specific item, update x-default if it matches the
				// old value.
				if (haveXDefault && xdItem != itemNode && xdItem != null
						&& xdItem.getValue().equals(itemNode.getValue()))
				{
					xdItem.setValue(itemValue);
				}
				// ! Do this after the x-default check!
				itemNode.setValue(itemValue);
			}
			else
			{
				// Update all items whose values match the old x-default value.
				assert  haveXDefault  &&  xdItem == itemNode;
				for (Iterator it = arrayNode.iterateChildren(); it.hasNext();)
				{
					XMPNode currItem = (XMPNode) it.next();
					if (currItem == xdItem
							|| !currItem.getValue().equals(
									xdItem != null ? xdItem.getValue() : null))
					{
						continue;
					}
					currItem.setValue(itemValue);
				}
				// And finally do the x-default item.
				if (xdItem != null)
				{	
					xdItem.setValue(itemValue);
				}	
			}
			break;

		case XMPNodeUtils.CLT_SINGLE_GENERIC:

			// Update the generic item, update x-default if it matches the old
			// value.
			if (haveXDefault && xdItem != itemNode && xdItem != null
					&& xdItem.getValue().equals(itemNode.getValue()))
			{
				xdItem.setValue(itemValue);
			}
			itemNode.setValue(itemValue); // ! Do this after
			// the x-default
			// check!
			break;

		case XMPNodeUtils.CLT_MULTIPLE_GENERIC:

			// Create the specific language, ignore x-default.
			XMPNodeUtils.appendLangItem(arrayNode, specificLang, itemValue);
			if (specificXDefault)
			{
				haveXDefault = true;
			}
			break;

		case XMPNodeUtils.CLT_XDEFAULT:

			// Create the specific language, update x-default if it was the only
			// item.
			if (xdItem != null  &&  arrayNode.getChildrenLength() == 1)
			{
				xdItem.setValue(itemValue);
			}
			XMPNodeUtils.appendLangItem(arrayNode, specificLang, itemValue);
			break;

		case XMPNodeUtils.CLT_FIRST_ITEM:

			// Create the specific language, don't add an x-default item.
			XMPNodeUtils.appendLangItem(arrayNode, specificLang, itemValue);
			if (specificXDefault)
			{
				haveXDefault = true;
			}
			break;

		default:
			// does not happen under normal circumstances
			throw new XMPException("Unexpected result from ChooseLocalizedText",
					XMPError.INTERNALFAILURE);

		}

		// Add an x-default at the front if needed.
		if (!haveXDefault && arrayNode.getChildrenLength() == 1)
		{
			XMPNodeUtils.appendLangItem(arrayNode, XMPConst.X_DEFAULT, itemValue);
		}
	}

	
	/**
	 * @see XMPMeta#setLocalizedText(String, String, String, String, String)
	 */
	public void setLocalizedText(String schemaNS, String altTextName, String genericLang,
			String specificLang, String itemValue) throws XMPException
	{
		setLocalizedText(schemaNS, altTextName, genericLang, specificLang, itemValue, null);
	}
	

	/**
	 * @throws XMPException
	 * @see XMPMeta#getProperty(String, String)
	 */
	public XMPProperty getProperty(String schemaNS, String propName) throws XMPException
	{
		return getProperty(schemaNS, propName, VALUE_STRING);
	}


	/**
	 * Returns a property, but the result value can be requested. It can be one
	 * of {@link XMPMetaImpl#VALUE_STRING}, {@link XMPMetaImpl#VALUE_BOOLEAN},
	 * {@link XMPMetaImpl#VALUE_INTEGER}, {@link XMPMetaImpl#VALUE_LONG},
	 * {@link XMPMetaImpl#VALUE_DOUBLE}, {@link XMPMetaImpl#VALUE_DATE},
	 * {@link XMPMetaImpl#VALUE_CALENDAR}, {@link XMPMetaImpl#VALUE_BASE64}.
	 * 
	 * @see XMPMeta#getProperty(String, String)
	 * @param schemaNS
	 *            a schema namespace
	 * @param propName
	 *            a property name or path
	 * @param valueType
	 *            the type of the value, see VALUE_...
	 * @return Returns an <code>XMPProperty</code>
	 * @throws XMPException
	 *             Collects any exception that occurs.
	 */
	protected XMPProperty getProperty(String schemaNS, String propName, int valueType)
			throws XMPException
	{
		ParameterAsserts.assertSchemaNS(schemaNS);
		ParameterAsserts.assertPropName(propName);

		final XMPPath expPath = XMPPathParser.expandXPath(schemaNS, propName);
		final XMPNode propNode = XMPNodeUtils.findNode(tree, expPath, false, null);

		if (propNode != null)
		{
			if (valueType != VALUE_STRING && propNode.getOptions().isCompositeProperty())
			{
				throw new XMPException("Property must be simple when a value type is requested",
						XMPError.BADXPATH);
			}

			final Object value = evaluateNodeValue(valueType, propNode);

			return new XMPProperty()
			{
				public Object getValue()
				{
					return value;
				}


				public PropertyOptions getOptions()
				{
					return propNode.getOptions();
				}


				public String getLanguage()
				{
					return null;
				}


				public String toString()
				{
					return value.toString();
				}
			};
		}
		else
		{
			return null;
		}
	}


	/**
	 * Returns a property, but the result value can be requested.
	 * 
	 * @see XMPMeta#getProperty(String, String)
	 * @param schemaNS
	 *            a schema namespace
	 * @param propName
	 *            a property name or path
	 * @param valueType
	 *            the type of the value, see VALUE_...
	 * @return Returns the node value as an object according to the
	 *         <code>valueType</code>.
	 * @throws XMPException
	 *             Collects any exception that occurs.
	 */
	protected Object getPropertyObject(String schemaNS, String propName, int valueType)
			throws XMPException
	{
		ParameterAsserts.assertSchemaNS(schemaNS);
		ParameterAsserts.assertPropName(propName);

		final XMPPath expPath = XMPPathParser.expandXPath(schemaNS, propName);
		final XMPNode propNode = XMPNodeUtils.findNode(tree, expPath, false, null);

		if (propNode != null)
		{
			if (valueType != VALUE_STRING && propNode.getOptions().isCompositeProperty())
			{
				throw new XMPException("Property must be simple when a value type is requested",
						XMPError.BADXPATH);
			}

			return evaluateNodeValue(valueType, propNode);
		}
		else
		{
			return null;
		}
	}


	/**
	 * @see XMPMeta#getPropertyBoolean(String, String)
	 */
	public Boolean getPropertyBoolean(String schemaNS, String propName) throws XMPException
	{
		return (Boolean) getPropertyObject(schemaNS, propName, VALUE_BOOLEAN);
	}


	/**
	 * @throws XMPException
	 * @see XMPMeta#setPropertyBoolean(String, String, boolean, PropertyOptions)
	 */
	public void setPropertyBoolean(String schemaNS, String propName, boolean propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, propValue ? TRUESTR : FALSESTR, options);
	}

	
	/**
	 * @see XMPMeta#setPropertyBoolean(String, String, boolean)
	 */
	public void setPropertyBoolean(String schemaNS, String propName, boolean propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, propValue ? TRUESTR : FALSESTR, null);
	}
	

	/**
	 * @see XMPMeta#getPropertyInteger(String, String)
	 */
	public Integer getPropertyInteger(String schemaNS, String propName) throws XMPException
	{
		return (Integer) getPropertyObject(schemaNS, propName, VALUE_INTEGER);
	}


	/**
	 * @see XMPMeta#setPropertyInteger(String, String, int, PropertyOptions)
	 */
	public void setPropertyInteger(String schemaNS, String propName, int propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, new Integer(propValue), options);
	}

	
	/**
	 * @see XMPMeta#setPropertyInteger(String, String, int)
	 */
	public void setPropertyInteger(String schemaNS, String propName, int propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, new Integer(propValue), null);
	}
	

	/**
	 * @see XMPMeta#getPropertyLong(String, String)
	 */
	public Long getPropertyLong(String schemaNS, String propName) throws XMPException
	{
		return (Long) getPropertyObject(schemaNS, propName, VALUE_LONG);
	}


	/**
	 * @see XMPMeta#setPropertyLong(String, String, long, PropertyOptions)
	 */
	public void setPropertyLong(String schemaNS, String propName, long propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, new Long(propValue), options);
	}


	/**
	 * @see XMPMeta#setPropertyLong(String, String, long)
	 */
	public void setPropertyLong(String schemaNS, String propName, long propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, new Long(propValue), null);
	}
	

	/**
	 * @see XMPMeta#getPropertyDouble(String, String)
	 */
	public Double getPropertyDouble(String schemaNS, String propName) throws XMPException
	{
		return (Double) getPropertyObject(schemaNS, propName, VALUE_DOUBLE);
	}


	/**
	 * @see XMPMeta#setPropertyDouble(String, String, double, PropertyOptions)
	 */
	public void setPropertyDouble(String schemaNS, String propName, double propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, new Double(propValue), options);
	}

	
	/**
	 * @see XMPMeta#setPropertyDouble(String, String, double)
	 */
	public void setPropertyDouble(String schemaNS, String propName, double propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, new Double(propValue), null);
	}
	

	/**
	 * @see XMPMeta#getPropertyDate(String, String)
	 */
	public XMPDateTime getPropertyDate(String schemaNS, String propName) throws XMPException
	{
		return (XMPDateTime) getPropertyObject(schemaNS, propName, VALUE_DATE);
	}


	/**
	 * @see XMPMeta#setPropertyDate(String, String, XMPDateTime,
	 *      PropertyOptions)
	 */
	public void setPropertyDate(String schemaNS, String propName, XMPDateTime propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, propValue, options);
	}

	
	/**
	 * @see XMPMeta#setPropertyDate(String, String, XMPDateTime)
	 */
	public void setPropertyDate(String schemaNS, String propName, XMPDateTime propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, propValue, null);
	}
	

	/**
	 * @see XMPMeta#getPropertyCalendar(String, String)
	 */
	public Calendar getPropertyCalendar(String schemaNS, String propName) throws XMPException
	{
		return (Calendar) getPropertyObject(schemaNS, propName, VALUE_CALENDAR);
	}


	/**
	 * @see XMPMeta#setPropertyCalendar(String, String, Calendar,
	 *      PropertyOptions)
	 */
	public void setPropertyCalendar(String schemaNS, String propName, Calendar propValue,
			PropertyOptions options) throws XMPException
	{
		setProperty(schemaNS, propName, propValue, options);
	}

	
	/**
	 * @see XMPMeta#setPropertyCalendar(String, String, Calendar)
	 */
	public void setPropertyCalendar(String schemaNS, String propName, Calendar propValue)
			throws XMPException
	{
		setProperty(schemaNS, propName, propValue, null);
	}