svn-gvsig-desktop / trunk / libraries / libGDBMS / src / com / hardcode / gdbms / engine / data / persistence / MementoContentHandler.java @ 1956
History | View | Annotate | Download (5.36 KB)
| 1 |
package com.hardcode.gdbms.engine.data.persistence; |
|---|---|
| 2 |
|
| 3 |
import com.hardcode.driverManager.DriverLoadException; |
| 4 |
|
| 5 |
import com.hardcode.gdbms.engine.data.DataSource; |
| 6 |
import com.hardcode.gdbms.engine.data.DataSourceFactory; |
| 7 |
import com.hardcode.gdbms.engine.data.NoSuchTableException; |
| 8 |
import com.hardcode.gdbms.engine.data.driver.DriverException; |
| 9 |
import com.hardcode.gdbms.engine.instruction.SemanticException; |
| 10 |
import com.hardcode.gdbms.parser.ParseException; |
| 11 |
|
| 12 |
import org.xml.sax.Attributes; |
| 13 |
import org.xml.sax.ContentHandler; |
| 14 |
import org.xml.sax.Locator; |
| 15 |
import org.xml.sax.SAXException; |
| 16 |
|
| 17 |
import java.io.IOException; |
| 18 |
|
| 19 |
import java.util.Stack; |
| 20 |
|
| 21 |
|
| 22 |
/**
|
| 23 |
* DOCUMENT ME!
|
| 24 |
*
|
| 25 |
* @author Fernando Gonz?lez Cort?s
|
| 26 |
*/
|
| 27 |
public class MementoContentHandler implements ContentHandler { |
| 28 |
private Stack mementos = new Stack(); |
| 29 |
private Memento root;
|
| 30 |
|
| 31 |
/**
|
| 32 |
* @see org.xml.sax.ContentHandler#endDocument()
|
| 33 |
*/
|
| 34 |
public void endDocument() throws SAXException { |
| 35 |
} |
| 36 |
|
| 37 |
/**
|
| 38 |
* @see org.xml.sax.ContentHandler#startDocument()
|
| 39 |
*/
|
| 40 |
public void startDocument() throws SAXException { |
| 41 |
} |
| 42 |
|
| 43 |
/**
|
| 44 |
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
|
| 45 |
*/
|
| 46 |
public void characters(char[] ch, int start, int length) |
| 47 |
throws SAXException {
|
| 48 |
} |
| 49 |
|
| 50 |
/**
|
| 51 |
* @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int)
|
| 52 |
*/
|
| 53 |
public void ignorableWhitespace(char[] ch, int start, int length) |
| 54 |
throws SAXException {
|
| 55 |
} |
| 56 |
|
| 57 |
/**
|
| 58 |
* @see org.xml.sax.ContentHandler#endPrefixMapping(java.lang.String)
|
| 59 |
*/
|
| 60 |
public void endPrefixMapping(String prefix) throws SAXException { |
| 61 |
} |
| 62 |
|
| 63 |
/**
|
| 64 |
* @see org.xml.sax.ContentHandler#skippedEntity(java.lang.String)
|
| 65 |
*/
|
| 66 |
public void skippedEntity(String name) throws SAXException { |
| 67 |
} |
| 68 |
|
| 69 |
/**
|
| 70 |
* @see org.xml.sax.ContentHandler#setDocumentLocator(org.xml.sax.Locator)
|
| 71 |
*/
|
| 72 |
public void setDocumentLocator(Locator locator) { |
| 73 |
} |
| 74 |
|
| 75 |
/**
|
| 76 |
* @see org.xml.sax.ContentHandler#processingInstruction(java.lang.String,
|
| 77 |
* java.lang.String)
|
| 78 |
*/
|
| 79 |
public void processingInstruction(String target, String data) |
| 80 |
throws SAXException {
|
| 81 |
} |
| 82 |
|
| 83 |
/**
|
| 84 |
* @see org.xml.sax.ContentHandler#startPrefixMapping(java.lang.String,
|
| 85 |
* java.lang.String)
|
| 86 |
*/
|
| 87 |
public void startPrefixMapping(String prefix, String uri) |
| 88 |
throws SAXException {
|
| 89 |
} |
| 90 |
|
| 91 |
/**
|
| 92 |
* @see org.xml.sax.ContentHandler#endElement(java.lang.String,
|
| 93 |
* java.lang.String, java.lang.String)
|
| 94 |
*/
|
| 95 |
public void endElement(String namespaceURI, String localName, String qName) |
| 96 |
throws SAXException {
|
| 97 |
if ( ("operation".equals(localName)) || ("table".equals(localName))){ |
| 98 |
root = (Memento) mementos.pop(); |
| 99 |
} |
| 100 |
} |
| 101 |
|
| 102 |
/**
|
| 103 |
* @see org.xml.sax.ContentHandler#startElement(java.lang.String,
|
| 104 |
* java.lang.String, java.lang.String, org.xml.sax.Attributes)
|
| 105 |
*/
|
| 106 |
public void startElement(String namespaceURI, String localName, |
| 107 |
String qName, Attributes atts) throws SAXException { |
| 108 |
if ("operation".equals(localName)) { |
| 109 |
OperationLayerMemento memento = new OperationLayerMemento(atts.getValue(
|
| 110 |
"dataSourceName"), atts.getValue("sql")); |
| 111 |
|
| 112 |
if (mementos.size() > 0) { |
| 113 |
Memento m = (Memento) mementos.peek(); |
| 114 |
|
| 115 |
if (m instanceof OperationLayerMemento) { |
| 116 |
OperationLayerMemento mem = (OperationLayerMemento) m; |
| 117 |
mem.addMemento(memento); |
| 118 |
} else {
|
| 119 |
throw new RuntimeException( |
| 120 |
"No table inside table is allowed");
|
| 121 |
} |
| 122 |
} |
| 123 |
|
| 124 |
mementos.push(memento); |
| 125 |
} else if ("table".equals(localName)) { |
| 126 |
DataSourceLayerMemento memento = new DataSourceLayerMemento(atts.getValue(
|
| 127 |
"table-name"), atts.getValue("table-alias")); |
| 128 |
mementos.push(memento); |
| 129 |
} |
| 130 |
} |
| 131 |
|
| 132 |
/**
|
| 133 |
* Get's the root memento of the XML parsed. Null if no parse has been
|
| 134 |
* done
|
| 135 |
*
|
| 136 |
* @return The memento
|
| 137 |
*/
|
| 138 |
public Memento getRoot() {
|
| 139 |
return root;
|
| 140 |
} |
| 141 |
|
| 142 |
/**
|
| 143 |
* DOCUMENT ME!
|
| 144 |
*
|
| 145 |
* @param m DOCUMENT ME!
|
| 146 |
* @param dsf DOCUMENT ME!
|
| 147 |
* @param mode DOCUMENT ME!
|
| 148 |
*
|
| 149 |
* @return DOCUMENT ME!
|
| 150 |
*
|
| 151 |
* @throws ParseException DOCUMENT ME!
|
| 152 |
* @throws DriverException DOCUMENT ME!
|
| 153 |
* @throws SemanticException DOCUMENT ME!
|
| 154 |
* @throws IOException DOCUMENT ME!
|
| 155 |
* @throws DriverLoadException DOCUMENT ME!
|
| 156 |
* @throws NoSuchTableException DOCUMENT ME!
|
| 157 |
* @throws RuntimeException DOCUMENT ME!
|
| 158 |
*/
|
| 159 |
private DataSource createDataSource(Memento m, DataSourceFactory dsf, |
| 160 |
int mode)
|
| 161 |
throws ParseException, DriverException, SemanticException, IOException, |
| 162 |
DriverLoadException, NoSuchTableException {
|
| 163 |
if (m instanceof OperationLayerMemento) { |
| 164 |
OperationLayerMemento olm = (OperationLayerMemento) m; |
| 165 |
|
| 166 |
for (int i = 0; i < olm.getMementoCount(); i++) { |
| 167 |
createDataSource(olm.getMemento(i), dsf, mode); |
| 168 |
} |
| 169 |
|
| 170 |
return dsf.executeSQL(olm.getSql(), mode);
|
| 171 |
} else if (m instanceof DataSourceLayerMemento) { |
| 172 |
DataSourceLayerMemento dslm = (DataSourceLayerMemento) m; |
| 173 |
|
| 174 |
return dsf.createRandomDataSource(dslm.getTableName(),
|
| 175 |
dslm.getTableAlias(), mode); |
| 176 |
} |
| 177 |
|
| 178 |
throw new RuntimeException("unrecognized data source type"); |
| 179 |
} |
| 180 |
|
| 181 |
/**
|
| 182 |
* DOCUMENT ME!
|
| 183 |
*
|
| 184 |
* @param dsf DOCUMENT ME!
|
| 185 |
* @param mode DOCUMENT ME!
|
| 186 |
*
|
| 187 |
* @return DOCUMENT ME!
|
| 188 |
*
|
| 189 |
* @throws DriverLoadException DOCUMENT ME!
|
| 190 |
* @throws ParseException DOCUMENT ME!
|
| 191 |
* @throws DriverException DOCUMENT ME!
|
| 192 |
* @throws SemanticException DOCUMENT ME!
|
| 193 |
* @throws IOException DOCUMENT ME!
|
| 194 |
* @throws NoSuchTableException DOCUMENT ME!
|
| 195 |
*/
|
| 196 |
public DataSource getDataSource(DataSourceFactory dsf, int mode) |
| 197 |
throws DriverLoadException, ParseException, DriverException, |
| 198 |
SemanticException, IOException, NoSuchTableException {
|
| 199 |
return createDataSource(root, dsf, mode);
|
| 200 |
} |
| 201 |
} |