svn-gvsig-desktop / tags / v1_0_2_Build_907 / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / values / ComplexValue.java @ 11015
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package com.hardcode.gdbms.engine.values; |
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import java.io.IOException; |
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import java.io.StringReader; |
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import java.io.StringWriter; |
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import java.io.Writer; |
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import java.sql.Types; |
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import java.text.ParseException; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.LinkedHashMap; |
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import java.util.Map; |
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import java.util.Set; |
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import org.kxml2.io.KXmlParser; |
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import org.xmlpull.v1.XmlPullParser; |
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import org.xmlpull.v1.XmlPullParserException; |
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public class ComplexValue extends StringValue implements Map { |
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private LinkedHashMap mapValues =null; |
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private static String indentString(int level) { |
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if (level < 1) return ""; |
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char[] chars =new char[level*4]; |
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Arrays.fill(chars,' '); |
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return String.copyValueOf(chars); |
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} |
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/**
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* Construye un objeto ConplexValue con el parser
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*
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* @param text
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*/
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private ComplexValue(KXmlParser parser) {
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super();
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this.mapValues = new LinkedHashMap(); |
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try {
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this.parse(parser);
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} catch (Exception e) { |
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e.printStackTrace(); |
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super.setValue(null); |
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} |
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} |
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/**
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* Construye un objeto ConplexValue con el texto que se pasa como parametro
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*
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* @param text
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*/
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ComplexValue(String text) {
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super();
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this.mapValues = new LinkedHashMap(); |
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this.setValue(text);
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} |
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/**
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* Creates a new ComplexValue object.
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*/
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ComplexValue() {
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super();
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this.mapValues = new LinkedHashMap(); |
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} |
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private void parse() { |
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String value = super.getValue(); |
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this.mapValues.clear();
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if (value == null || value.length() == 0) { |
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return;
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} |
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KXmlParser parser = new KXmlParser();
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try {
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parser.setInput(new StringReader(value)); |
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} catch (XmlPullParserException e) {
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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try {
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this.parse(parser);
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} catch (Exception e) { |
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super.setValue(null); |
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} |
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} |
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private void parse(KXmlParser parser) throws XmlPullParserException, IOException, ParseException { |
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/*
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* Se espera que la le va a llegar una cadena
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* con el siguiente formato:
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*
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* <dato1>valor1</dato1>
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* <dato2>valor2</dato2>
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* <dato3>
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* <dato3_1>valor3</dato3_1>
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* <dato3_2>
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* <dato3_2_1>valor4</dato3_2_1>
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* ....
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* </dato3_2>
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* </dato3>
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* ....
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*
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*
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*
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* dentro del mapValues se registran los
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* valores de 'dato1', 'dato2' y 'dato3'.
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* Este ultimo sera a su vez un ComplexValue, y
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* asi recursivamente.
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*/
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//FIXME: OJO!!!! que hacemos con la excepciones
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try {
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String key;
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Value value; |
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String cad;
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String type;
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if (parser.getEventType() == XmlPullParser.START_DOCUMENT) {
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parser.nextTag(); |
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} |
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while (parser.getEventType() == XmlPullParser.START_TAG) {
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key = parser.getName(); |
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try {
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type = parser.getAttributeValue(null,"_type"); |
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cad = parser.nextText(); |
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if (type != null) { |
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value = ValueFactory.createValueByValueName(cad,type); |
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} else {
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value = ValueFactory.createValue(cad); |
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} |
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} catch (XmlPullParserException e) {
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if (parser.getEventType() == XmlPullParser.START_TAG) {
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value = new ComplexValue(parser);
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} else if (parser.getEventType() == XmlPullParser.END_TAG) { |
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continue;
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} else {
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throw e;
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} |
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} |
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parser.require(XmlPullParser.END_TAG, null, key);
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this.mapValues.put(key,value);
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parser.nextTag(); |
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} |
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} catch (XmlPullParserException e) {
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if (parser.getEventType() == XmlPullParser.END_DOCUMENT) return; |
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throw e;
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} |
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} |
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private String dump() { |
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StringWriter buffer = new StringWriter(); |
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try {
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this.dumpToWriter(buffer,0); |
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} catch (IOException e) { |
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return null; |
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} |
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return buffer.toString();
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} |
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private void dumpToWriter(Writer buffer, int indent) throws IOException { |
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Iterator iter = this.mapValues.entrySet().iterator(); |
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String identStr = indentString(indent);
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indent++; |
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Entry entry; |
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String key;
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String typeString;
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Value value; |
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while (iter.hasNext()) {
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entry = (Entry)iter.next(); |
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key = (String)entry.getKey();
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value = (Value)entry.getValue(); |
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buffer.write(identStr+"<"+key+ getDumpTypePropertyString(value) +">"); |
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if (value instanceof ComplexValue) { |
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buffer.write("\n");
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((ComplexValue)value).dumpToWriter(buffer,indent); |
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buffer.write(identStr); |
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} else {
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buffer.write(value.toString()); |
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} |
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buffer.write("</"+key+">\n"); |
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} |
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} |
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private String getDumpTypePropertyString(Value value) { |
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if (value instanceof StringValue) { |
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return ""; |
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} else if (value instanceof ComplexValue) { |
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return ""; |
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} else{
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String classname = value.getClass().getName();
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return " _type=\"" + (classname.substring(classname.lastIndexOf(".")+1)) + "\""; |
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} |
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} |
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public int size() { |
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return this.mapValues.size(); |
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} |
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public void clear() { |
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super.setValue(""); |
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this.mapValues.clear();
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} |
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public boolean isEmpty() { |
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return this.mapValues.isEmpty(); |
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} |
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public boolean containsKey(Object key) { |
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return this.mapValues.containsKey(key); |
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} |
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public boolean containsValue(Object value) { |
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return this.mapValues.containsValue(value); |
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} |
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public Collection values() { |
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return this.mapValues.values(); |
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} |
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public void putAll(Map t) { |
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throw new UnsupportedOperationException(); |
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} |
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public Set entrySet() { |
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return this.mapValues.entrySet(); |
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} |
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public Set keySet() { |
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return this.mapValues.keySet(); |
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} |
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public Object get(Object key) { |
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return this.mapValues.get(key); |
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} |
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public Object remove(Object key) { |
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return this.mapValues.remove(key); |
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} |
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public Object put(Object key, Object value) { |
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throw new IllegalArgumentException("'value' must be a Value instance"); |
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//return this.mapValues.put(key,value);
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} |
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public Object put(Object key, Value value) { |
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return this.mapValues.put(key,value); |
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} |
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public String getStringValue(ValueWriter writer) { |
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super.setValue(this.dump()); |
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return super.getStringValue(writer); |
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} |
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public String getValue() { |
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super.setValue(this.dump()); |
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return super.getValue(); |
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} |
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public void setValue(String value) { |
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super.setValue(value);
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this.parse();
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} |
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public String toString() { |
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return this.getValue(); |
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} |
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public int getSQLType() { |
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//return super.getSQLType(); --> Types.LONGVARCHAR;
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return Types.STRUCT; |
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} |
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} |