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EcogridQueryParser.java - Revision 1.3

EcogridQueryParser.java,1.3	.	Disk File
Skipping to line 52	.
* A class to parse ecogrid xml query document to java object	.	* A class to parse ecogrid xml query document to java object
*/	.	*/
public class EcogridQueryParser	.	public class EcogridQueryParser
{	.	{
//fields	.	//fields
private QueryType ecogridQuery;	.	private QueryType _ecogridQuery;
private Document doc;	.	private Node _queryNode;
	.
//Constant	.	//Constant
private static final String QUERYIDATTRIBUTE = "/query/@queryId";	.	private static final String QUERYIDATTRIBUTE = "@queryId";
private static final String SYSTEMATTRIBUTE = "/query/@system";	.	private static final String SYSTEMATTRIBUTE = "@system";
private static final String NAMESPACE = "/query/namespace";	.	private static final String NAMESPACE = "namespace";
private static final String PREFIX = "prefix";	.	private static final String PREFIX = "prefix";
private static final String RETURNFIELD = "/query/returnfield";	.	private static final String RETURNFIELD = "returnField";
private static final String TITLE = "/query/title";	.	private static final String TITLE = "title";
private static final String FIRSTAND = "/query/AND";	.	private static final String FIRSTAND = "AND";
private static final String FIRSTOR = "/query/OR";	.	private static final String FIRSTOR = "OR";
private static final String FIRSTCONDITION = "/query/condition";	.	private static final String FIRSTCONDITION = "condition";
private static final String AND = "AND";	.	private static final String AND = "AND";
private static final String OR = "OR";	.	private static final String OR = "OR";
private static final String CON = "condition";	.	private static final String CON = "condition";
private static final String OPERATOR = "operator";	.	private static final String OPERATOR = "operator";
private static final String CONCEPT = "concept";	.	private static final String CONCEPT = "concept";
	.
/**	.	/**
* default constructor	.	* Constructor with reader for parsing XML
* @param xmlInput xml source	.	* @param xmlInput xml source
*/	.	*/
public EcogridQueryParser (Reader xmlInput) throws Exception	.	public EcogridQueryParser (Reader xmlInput) throws Exception
{	.	{
//create new ecogrid query java object	.	//create new ecogrid query java object
ecogridQuery = new QueryType();	.	_ecogridQuery = new QueryType();
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//build dom tree	.	//build dom tree
InputSource in = new InputSource(xmlInput);	.	InputSource in = new InputSource(xmlInput);
DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();	.	DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
dfactory.setNamespaceAware(false);	.	dfactory.setNamespaceAware(false);
doc = dfactory.newDocumentBuilder().parse(in);	.	Document doc = dfactory.newDocumentBuilder().parse(in);
}//EcogridQueryParser	.
	.	// Find the query node, all searches are relative to it.
	.	NodeList queryIdList = XPathAPI.selectNodeList(doc, "/query");
	.	_queryNode = queryIdList.item(0);
	.
	.	} //EcogridQueryParser
	.
	.	/**
	.	* Constructor wityh DOM node point to Query node
	.	* @param aQueryDOMNode DOM Node
	.	*/
	.	public EcogridQueryParser (Node aQueryDOMNode)
	.	{
	.	//create new ecogrid query java object
	.	_ecogridQuery = new QueryType();
	.	_queryNode = aQueryDOMNode;
	.	} //EcogridQueryParser
	.
/**	.	/**
* Method to get ecogridquery	.	* Method to get ecogridquery
*/	.	*/
public QueryType getEcogridQuery()	.	public QueryType getEcogridQuery()
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return ecogridQuery;	.	return _ecogridQuery;
}	.	}
	.
/**	.	/**
* Method to set ecogrid query	.	* Method to set ecogrid query
*/	.	*/
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{	.	{
ecogridQuery = query;	.	_ecogridQuery = query;
}	.	}
	.
/**	.	/**
*Method set up ecogrid query object by parsing xml	.	*Method set up ecogrid query object by parsing xml
*/	.	*/
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setupReturnField();	.	setupReturnField();
setupTitle();	.	setupTitle();
setupFirstRelation();	.	setupFirstRelation();
}//parseXML	.	}//parseXML
	.
	.	private Node getAttrNode(String aDocXPath, String aNodeXPath)
	.	{
	.	Node node = _queryNode;
	.	try
	.	{
	.	if (_queryNode.getNodeType() == Node.DOCUMENT_NODE)
	.	{
	.	NodeList queryIdList = XPathAPI.selectNodeList(_queryNode, aDocXP ath);
	.	node = queryIdList.item(0);
	.	}
	.	else
	.	{
	.	NodeList queryIdList = XPathAPI.selectNodeList(_queryNode, aNod eXPath);
	.	node = queryIdList.item(0);
	.	}
	.	} catch (Exception e)
	.	{
	.	System.err.println(e);
	.	}
	.	return node;
	.	}
/* setup queryid and system */	.	/* setup queryid and system */
private void setupQueryIdAndSystem() throws Exception	.	private void setupQueryIdAndSystem() throws Exception
{	.	{
	.	// The _queryNode may be a document node qparsed in from an XML document or may be
	.	// a generic DOM node (a subtree) of an existing tree
// get query id	.	// get query id
NodeList queryIdList = XPathAPI.selectNodeList(doc, QUERYIDATTRIBUTE);	.	NodeList queryIdList = XPathAPI.selectNodeList(_queryNode, QUERYIDATTRIBU TE);
String queryId = (queryIdList.item(0)).getNodeValue();	.	String queryId = ((Node)queryIdList.item(0)).getNodeValue();
	.
//System.out.println("queryId is: "+ queryId);	.	//System.out.println("queryId is: "+ queryId);
// set query id	.	// set query id
ecogridQuery.setQueryId(queryId);	.	_ecogridQuery.setQueryId(queryId);
// get system	.	// get system
NodeList systemList = XPathAPI.selectNodeList(doc, SYSTEMATTRIBUTE);	.	NodeList systemList = XPathAPI.selectNodeList(_queryNode, SYSTEMATTRIBUTE );
String system = (systemList.item(0)).getNodeValue();	.	String system = (systemList.item(0)).getNodeValue();
//System.out.println("system is: "+ system);	.	//System.out.println("system is: "+ system);
URI systemUri = new URI(system);	.	URI systemUri = new URI(system);
//set system	.	//set system
ecogridQuery.setSystem(systemUri);	.	_ecogridQuery.setSystem(systemUri);
}//setupQueryIdAndSystem	.
	.	} // setupQueryIdAndSystem
	.
	.
/* setup namepsace */	.	/* setup namepsace */
private void setupNamespace() throws Exception	.	private void setupNamespace() throws Exception
{	.	{
// get namespace	.	// get namespace
NodeList namespaceList = XPathAPI.selectNodeList(doc, NAMESPACE);	.	NodeList namespaceList = XPathAPI.selectNodeList(_queryNode, NAMESPACE);
int length = namespaceList.getLength();	.	int length = namespaceList.getLength();
QueryType_namespace [] namespaceArray;	.	QueryType_namespace [] namespaceArray;
if ( length != 0 )	.	if ( length != 0 )
{	.	{
namespaceArray = new QueryType_namespace [length];	.	namespaceArray = new QueryType_namespace [length];
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queryNamespace.setPrefix(prefix);	.	queryNamespace.setPrefix(prefix);
// put the object into array	.	// put the object into array
namespaceArray[i]=queryNamespace;	.	namespaceArray[i]=queryNamespace;
}	.	}
// set up the QueryType_namespace object to ecogrid query object	.	// set up the QueryType_namespace object to ecogrid query object
ecogridQuery.setNamespace(namespaceArray);	.	_ecogridQuery.setNamespace(namespaceArray);
}	.	}
}//setupNamespace	.	}//setupNamespace
	.
/* setup returnfield */	.	/* setup returnfield */
private void setupReturnField() throws Exception	.	private void setupReturnField() throws Exception
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// get retrunfield	.	// get retrunfield
NodeList returnFieldList = XPathAPI.selectNodeList(doc, RETURNFIELD);	.	NodeList returnFieldList = XPathAPI.selectNodeList(_queryNode, RETURNFIEL D);
String [] returnFieldArray ;	.	String [] returnFieldArray ;
int length = returnFieldList.getLength();	.	int length = returnFieldList.getLength();
if (length != 0)	.	if (length != 0)
{	.	{
returnFieldArray = new String [length];	.	returnFieldArray = new String [length];
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Node returnfield = returnFieldList.item(i);	.	Node returnfield = returnFieldList.item(i);
String returnfieldString = returnfield.getFirstChild().getNodeValue() ;	.	String returnfieldString = returnfield.getFirstChild().getNodeValue() ;
returnFieldArray[i] = returnfieldString;	.	returnFieldArray[i] = returnfieldString;
}	.	}
// set up the QueryType_namespace object to ecogrid query object	.	// set up the QueryType_namespace object to ecogrid query object
ecogridQuery.setReturnfield(returnFieldArray);	.	_ecogridQuery.setReturnfield(returnFieldArray);
}	.	}
}//setupReturnField	.	}//setupReturnField
	.
/* setup title */	.	/* setup title */
private void setupTitle() throws Exception	.	private void setupTitle() throws Exception
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// get retrunfield	.	// get retrunfield
NodeList titleList = XPathAPI.selectNodeList(doc, TITLE);	.	NodeList titleList = XPathAPI.selectNodeList(_queryNode, TITLE);
String [] titleArray ;	.	String [] titleArray ;
int length = titleList.getLength();	.	int length = titleList.getLength();
if (length != 0)	.	if (length != 0)
{	.	{
titleArray = new String [length];	.	titleArray = new String [length];
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String titleString = title.getFirstChild().getNodeValue();	.	String titleString = title.getFirstChild().getNodeValue();
//System.out.println("title is: " + titleString);	.	//System.out.println("title is: " + titleString);
titleArray[i] = titleString;	.	titleArray[i] = titleString;
}	.	}
// set up the QueryType_namespace object to ecogrid query object	.	// set up the QueryType_namespace object to ecogrid query object
ecogridQuery.setTitle(titleArray);	.	_ecogridQuery.setTitle(titleArray);
}	.	}
}//setupReturnField	.	}//setupReturnField
	.
/* setup first relation type */	.	/* setup first relation type */
private void setupFirstRelation() throws Exception	.	private void setupFirstRelation() throws Exception
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NodeList firstAND = XPathAPI.selectNodeList(doc, FIRSTAND);	.	NodeList firstAND = XPathAPI.selectNodeList(_queryNode, FIRSTAND);
NodeList firstOR = XPathAPI.selectNodeList(doc, FIRSTOR);	.	NodeList firstOR = XPathAPI.selectNodeList(_queryNode, FIRSTOR);
NodeList firstCondition = XPathAPI.selectNodeList(doc, FIRSTCONDITION);	.	NodeList firstCondition = XPathAPI.selectNodeList(_queryNode, FIRSTCONDIT ION);
int andLength = firstAND.getLength();	.	int andLength = firstAND.getLength();
int orLength = firstOR.getLength();	.	int orLength = firstOR.getLength();
int conLength = firstCondition.getLength();	.	int conLength = firstCondition.getLength();
if ( andLength != 0 && orLength ==0 && conLength == 0)	.	if ( andLength != 0 && orLength ==0 && conLength == 0)
{	.	{
Skipping to line 266	.
ANDType and = new ANDType();	.	ANDType and = new ANDType();
handleANDType(and, firstAND.item(0));	.	handleANDType(and, firstAND.item(0));
ecogridQuery.setAND(and);	.	_ecogridQuery.setAND(and);
	.
}	.	}
else if (orLength != 0 && andLength ==0 && conLength == 0)	.	else if (orLength != 0 && andLength ==0 && conLength == 0)
{	.	{
// first is or	.	// first is or
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handleORType(or, firstOR.item(0));	.	handleORType(or, firstOR.item(0));
ecogridQuery.setOR(or);	.	_ecogridQuery.setOR(or);
}	.	}
else if (conLength != 0 &&orLength == 0 && andLength == 0 )	.	else if (conLength != 0 &&orLength == 0 && andLength == 0 )
{	.	{
// first is condition	.	// first is condition
ConditionType condition = handleConditionType(firstCondition.item(0));	.	ConditionType condition = handleConditionType(firstCondition.item(0));
ecogridQuery.setCondition(condition);	.	_ecogridQuery.setCondition(condition);

EcogridQueryTransformer.java - Revision 1.3

EcogridQueryTransformer.java,1.3	.	Disk File
Skipping to line 200	.
String[] returnfields = aQuery.getReturnfield();	.	String[] returnfields = aQuery.getReturnfield();
if (returnfields != null)	.	if (returnfields != null)
{	.	{
for (int i = 0; i < returnfields.length; i++)	.	for (int i = 0; i < returnfields.length; i++)
{	.	{
strBuf.append(" <returnfield>" + returnfields[i] + "</returnf ield>\n");	.	strBuf.append(" <returnField>" + returnfields[i] + "</returnF ield>\n");
}	.	}
}	.	}
	.
String[] titles = aQuery.getTitle();	.	String[] titles = aQuery.getTitle();
if (titles != null)	.	if (titles != null)