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| package Configuration;
import java.lang.reflect.Field;
import java.util.LinkedList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Parse configuration XML file and modify default values of object o
*
* @author Patrick Mast
* @since 2007/04/13
*
*/
public class SaxParser extends DefaultHandler {
/**
* Configuration object, which will be modified
*/
private Object o = null;
/**
* To store the name of the current property
*/
private String name = null;
/**
* To store the values of the current property
*/
private LinkedList<String> value = new LinkedList<String>();
/**
* When true, the current value must be read
*/
private boolean readValue = false;
/**
* Class of object o
*/
Class<?> c = null;
/**
* Fields of the class above
*/
Field[] f = null;
Class[] classes = { boolean.class, Boolean.class,
byte.class, Byte.class,
short.class, Short.class,
int.class, Integer.class,
long.class, Long.class,
float.class, Float.class,
double.class, Double.class,
String.class,
boolean[].class, Boolean[].class,
byte[].class, Byte[].class,
short[].class, Short[].class,
int[].class, Integer[].class,
long[].class, Long[].class,
float[].class, Float[].class,
double[].class, Double[].class,
String[].class};
/**
* boolean type
*/
final byte BOOLEAN_PRIMITIVE = 0;
/**
* Boolean type
*/
final byte BOOLEAN = 1;
/**
* byte type
*/
final byte BYTE_PRIMITIVE = 2;
/**
* Byte type
*/
final byte BYTE = 3;
/**
* short type
*/
final byte SHORT_PRIMITIVE = 4;
/**
* Short type
*/
final byte SHORT = 5;
/**
* int type
*/
final byte INTEGER_PRIMITIVE = 6;
/**
* Integer type
*/
final byte INTEGER = 7;
/**
* long type
*/
final byte LONG_PRIMITIVE = 8;
/**
* Long type
*/
final byte LONG = 9;
/**
* float type
*/
final byte FLOAT_PRIMITIVE = 10;
/**
* Float type
*/
final byte FLOAT = 11;
/**
* double type
*/
final byte DOUBLE_PRIMITIVE = 12;
/**
* Double type
*/
final byte DOUBLE = 13;
/**
* String type
*/
final byte STRING = 14;
/**
* boolean array type
*/
final byte BOOLEAN_P_ARRAY = 15;
/**
* Boolean array type
*/
final byte BOOLEAN_ARRAY = 16;
/**
* byte array type
*/
final byte BYTE_P_ARRAY = 17;
/**
* Bate array type
*/
final byte BYTE_ARRAY = 18;
/**
* short array type
*/
final byte SHORT_P_ARRAY = 19;
/**
* Short array type
*/
final byte SHORT_ARRAY = 20;
/**
* int array type
*/
final byte INTEGER_P_ARRAY = 21;
/**
* Integer array type
*/
final byte INTEGER_ARRAY = 22;
/**
* long array type
*/
final byte LONG_P_ARRAY = 23;
/**
* Long array type
*/
final byte LONG_ARRAY = 24;
/**
* float array type
*/
final byte FLOAT_P_ARRAY = 25;
/**
* Float array type
*/
final byte FLOAT_ARRAY = 26;
/**
* double array type
*/
final byte DOUBLE_P_ARRAY = 27;
/**
* Double array type
*/
final byte DOUBLE_ARRAY = 28;
/**
* String array type
*/
final byte STRING_ARRAY = 29;
/**
* Field's names of the configuration file
*/
private LinkedList<String> names = new LinkedList<String>();
/**
* Field's type of the configuration file
*/
private LinkedList<Class> types = new LinkedList<Class>();
/**
* Constructor
*
* @param o Configuration object, which will be modified
*/
public SaxParser(Object o) {
this.o=o;
}
/* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#startDocument()
*/
@Override
public void startDocument() throws SAXException, ConfigException {
// Class of configuration file
c=this.o.getClass();
// Fields of configuration file
f=c.getFields();
// Catch type and name for each field
for(int i=0;i<f.length;i++){
try {
types.add(f[i].getType());
names.add(f[i].getName());
} catch (IllegalArgumentException e) {
throw new ConfigException(ConfigException.ILLEGAL_ARGUMENT);
}
}
}
/* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
@Override
public void startElement(String arg0, String arg1, String arg2, Attributes arg3) throws SAXException {
// The tag <property> is the current tag
if(arg2=="property"){
// Set property's name
this.name=new String(arg3.getValue(0));
}
// The tag <value> is the current tag
if(arg2=="value"){
// Value must be read
readValue = true;
}
}
/* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#characters(char[], int, int)
*/
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
// Get the current value
String value = new String(ch, start, length);
// If the current values must be read
if(readValue){
// Add the value to the list
this.value.add(value);
}
}
/**
* Search an object in an object's array
*
* @param array Array
* @param search Object to search
* @return Index of fouded object in the array, negative value if no object found
*/
private int searchArray (Object[] array, Object search){
for(int i=0;i<array.length;i++){
if(array[i].equals(search)){
// Found, return index
return i;
}
}
// Not found, return negative value
return -1;
}
/* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
*/
@Override
public void endElement(String arg0, String arg1, String arg2) throws SAXException {
// The tag </property> is the current tag
if(arg2=="property"){
//System.out.println(this.name+"="+this.value); // to delete
// Find "this.name" in the names LinkedList
int index = names.indexOf(this.name);
if(index>=0){
try {
// Type of the current field
Class type = f[index].getType();
// Value which will be store in the current field
Object val = null;
// Type of current field
int intType = searchArray(classes, type);
// Traitement differes for different types
val=typeTraitement(val, intType, index);
// Normal
if(val!=null){
f[index].set(this.o, val);
}
// An error occured, the type was not recognised
else{
throw new ConfigException(ConfigException.BAD_TYPE_FOUND);
}
} catch (IllegalArgumentException e) {
throw new ConfigException(ConfigException.ILLEGAL_ARGUMENT);
} catch (IllegalAccessException e) {
throw new ConfigException(ConfigException.ILLEGAL_ACCESS);
}
}
// Clear the list for next element
this.value.clear();
}
// Maybe the next value is not important
readValue=false;
}
private Object typeTraitement(Object val, int intType, int index){
switch(intType){
case BOOLEAN_PRIMITIVE:
case BOOLEAN: val = Boolean.parseBoolean(this.value.get(0)); break;
case BYTE_PRIMITIVE:
case BYTE: val = Byte.parseByte(this.value.get(0)); break;
case SHORT_PRIMITIVE:
case SHORT: val = Short.parseShort(this.value.get(0)); break;
case INTEGER_PRIMITIVE:
case INTEGER: val = Integer.parseInt(this.value.get(0)); break;
case LONG_PRIMITIVE:
case LONG: val = Long.parseLong(this.value.get(0)); break;
case FLOAT_PRIMITIVE:
case FLOAT: val = Float.parseFloat(this.value.get(0)); break;
case DOUBLE_PRIMITIVE:
case DOUBLE: val = Double.parseDouble(this.value.get(0)); break;
case STRING: val = this.value.get(0); break;
case BOOLEAN_P_ARRAY:
boolean[] arrayBooleanP = new boolean[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayBooleanP[i]=Boolean.parseBoolean(this.value.get(i));
val=arrayBooleanP;
break;
case BOOLEAN_ARRAY:
Boolean[] arrayBoolean = new Boolean[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayBoolean[i]=Boolean.parseBoolean(this.value.get(i));
val=arrayBoolean;
break;
case BYTE_P_ARRAY:
byte[] arrayByteP = new byte[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayByteP[i]=Byte.parseByte(this.value.get(i));
val=arrayByteP;
break;
case BYTE_ARRAY:
Byte[] arrayByte = new Byte[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayByte[i]=Byte.parseByte(this.value.get(i));
val=arrayByte;
break;
case SHORT_P_ARRAY:
short[] arrayShortP = new short[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayShortP[i]=Short.parseShort(this.value.get(i));
val=arrayShortP;
break;
case SHORT_ARRAY:
Short[] arrayShort = new Short[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayShort[i]=Short.parseShort(this.value.get(i));
val=arrayShort;
break;
case INTEGER_P_ARRAY:
int[] arrayIntP = new int[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayIntP[i]=Integer.parseInt(this.value.get(i));
val=arrayIntP;
break;
case INTEGER_ARRAY:
Integer[] arrayInt = new Integer[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayInt[i]=Integer.parseInt(this.value.get(i));
val=arrayInt;
break;
case LONG_P_ARRAY:
long[] arrayLongP = new long[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayLongP[i]=Long.parseLong(this.value.get(i));
val=arrayLongP;
break;
case LONG_ARRAY:
Long[] arrayLong = new Long[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayLong[i]=Long.parseLong(this.value.get(i));
val=arrayLong;
break;
case FLOAT_P_ARRAY:
float[] arrayFloatP = new float[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayFloatP[i]=Float.parseFloat(this.value.get(i));
val=arrayFloatP;
break;
case FLOAT_ARRAY:
Float[] arrayFloat = new Float[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayFloat[i]=Float.parseFloat(this.value.get(i));
val=arrayFloat;
break;
case DOUBLE_P_ARRAY:
double[] arrayDoubleP = new double[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayDoubleP[i]=Double.parseDouble(this.value.get(i));
val=arrayDoubleP;
break;
case DOUBLE_ARRAY:
Double[] arrayDouble = new Double[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayDouble[i]=Double.parseDouble(this.value.get(i));
val=arrayDouble;
break;
case STRING_ARRAY:
String[] arrayString = new String[this.value.size()];
for(int i=0;i<this.value.size();i++)
arrayString[i]=this.value.get(i);
val=arrayString;
break;
}
return val;
}
} |
