svn-gvsig-desktop / trunk / libraries / libGDBMS / src / com / hardcode / gdbms / engine / data / persistence / MementoContentHandler.java @ 1956
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package com.hardcode.gdbms.engine.data.persistence; |
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import com.hardcode.driverManager.DriverLoadException; |
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import com.hardcode.gdbms.engine.data.DataSource; |
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import com.hardcode.gdbms.engine.data.DataSourceFactory; |
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import com.hardcode.gdbms.engine.data.NoSuchTableException; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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import com.hardcode.gdbms.engine.instruction.SemanticException; |
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import com.hardcode.gdbms.parser.ParseException; |
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import org.xml.sax.Attributes; |
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import org.xml.sax.ContentHandler; |
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import org.xml.sax.Locator; |
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import org.xml.sax.SAXException; |
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import java.io.IOException; |
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import java.util.Stack; |
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/**
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* DOCUMENT ME!
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class MementoContentHandler implements ContentHandler { |
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private Stack mementos = new Stack(); |
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private Memento root;
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/**
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* @see org.xml.sax.ContentHandler#endDocument()
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*/
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public void endDocument() throws SAXException { |
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} |
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/**
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* @see org.xml.sax.ContentHandler#startDocument()
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*/
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public void startDocument() throws SAXException { |
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} |
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/**
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* @see org.xml.sax.ContentHandler#characters(char[], int, int)
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*/
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public void characters(char[] ch, int start, int length) |
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throws SAXException {
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} |
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/**
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* @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int)
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*/
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public void ignorableWhitespace(char[] ch, int start, int length) |
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throws SAXException {
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} |
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/**
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* @see org.xml.sax.ContentHandler#endPrefixMapping(java.lang.String)
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*/
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public void endPrefixMapping(String prefix) throws SAXException { |
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} |
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/**
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* @see org.xml.sax.ContentHandler#skippedEntity(java.lang.String)
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*/
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public void skippedEntity(String name) throws SAXException { |
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} |
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/**
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* @see org.xml.sax.ContentHandler#setDocumentLocator(org.xml.sax.Locator)
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*/
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public void setDocumentLocator(Locator locator) { |
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} |
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/**
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* @see org.xml.sax.ContentHandler#processingInstruction(java.lang.String,
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* java.lang.String)
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*/
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public void processingInstruction(String target, String data) |
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throws SAXException {
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} |
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/**
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* @see org.xml.sax.ContentHandler#startPrefixMapping(java.lang.String,
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* java.lang.String)
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*/
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public void startPrefixMapping(String prefix, String uri) |
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throws SAXException {
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} |
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/**
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* @see org.xml.sax.ContentHandler#endElement(java.lang.String,
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* java.lang.String, java.lang.String)
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*/
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public void endElement(String namespaceURI, String localName, String qName) |
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throws SAXException {
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if ( ("operation".equals(localName)) || ("table".equals(localName))){ |
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root = (Memento) mementos.pop(); |
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} |
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} |
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/**
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* @see org.xml.sax.ContentHandler#startElement(java.lang.String,
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* java.lang.String, java.lang.String, org.xml.sax.Attributes)
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*/
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public void startElement(String namespaceURI, String localName, |
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String qName, Attributes atts) throws SAXException { |
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if ("operation".equals(localName)) { |
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OperationLayerMemento memento = new OperationLayerMemento(atts.getValue(
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"dataSourceName"), atts.getValue("sql")); |
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if (mementos.size() > 0) { |
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Memento m = (Memento) mementos.peek(); |
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if (m instanceof OperationLayerMemento) { |
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OperationLayerMemento mem = (OperationLayerMemento) m; |
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mem.addMemento(memento); |
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} else {
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throw new RuntimeException( |
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"No table inside table is allowed");
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} |
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} |
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mementos.push(memento); |
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} else if ("table".equals(localName)) { |
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DataSourceLayerMemento memento = new DataSourceLayerMemento(atts.getValue(
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"table-name"), atts.getValue("table-alias")); |
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mementos.push(memento); |
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} |
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} |
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/**
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* Get's the root memento of the XML parsed. Null if no parse has been
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* done
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*
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* @return The memento
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*/
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public Memento getRoot() {
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return root;
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} |
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/**
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* DOCUMENT ME!
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*
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* @param m DOCUMENT ME!
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* @param dsf DOCUMENT ME!
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* @param mode DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*
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* @throws ParseException DOCUMENT ME!
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* @throws DriverException DOCUMENT ME!
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* @throws SemanticException DOCUMENT ME!
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* @throws IOException DOCUMENT ME!
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* @throws DriverLoadException DOCUMENT ME!
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* @throws NoSuchTableException DOCUMENT ME!
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* @throws RuntimeException DOCUMENT ME!
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*/
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private DataSource createDataSource(Memento m, DataSourceFactory dsf, |
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int mode)
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throws ParseException, DriverException, SemanticException, IOException, |
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DriverLoadException, NoSuchTableException { |
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if (m instanceof OperationLayerMemento) { |
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OperationLayerMemento olm = (OperationLayerMemento) m; |
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for (int i = 0; i < olm.getMementoCount(); i++) { |
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createDataSource(olm.getMemento(i), dsf, mode); |
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} |
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return dsf.executeSQL(olm.getSql(), mode);
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} else if (m instanceof DataSourceLayerMemento) { |
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DataSourceLayerMemento dslm = (DataSourceLayerMemento) m; |
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return dsf.createRandomDataSource(dslm.getTableName(),
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dslm.getTableAlias(), mode); |
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} |
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throw new RuntimeException("unrecognized data source type"); |
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} |
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/**
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* DOCUMENT ME!
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*
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* @param dsf DOCUMENT ME!
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* @param mode DOCUMENT ME!
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*
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* @return DOCUMENT ME!
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*
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* @throws DriverLoadException DOCUMENT ME!
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* @throws ParseException DOCUMENT ME!
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* @throws DriverException DOCUMENT ME!
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* @throws SemanticException DOCUMENT ME!
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* @throws IOException DOCUMENT ME!
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* @throws NoSuchTableException DOCUMENT ME!
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*/
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public DataSource getDataSource(DataSourceFactory dsf, int mode) |
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throws DriverLoadException, ParseException, DriverException, |
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SemanticException, IOException, NoSuchTableException {
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return createDataSource(root, dsf, mode);
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} |
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} |