/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.sojo.core.conversion.interceptor;
import java.io.Serializable;
import java.util.Comparator;
import java.util.Date;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import java.util.Map.Entry;
import net.sf.sojo.core.ConversionContext;
import net.sf.sojo.core.ConversionException;
import net.sf.sojo.core.ConverterInterceptorRecursive;
import net.sf.sojo.core.reflect.ReflectionHelper;
/**
* A key from a map, where this key is extending to information of the number from inserting in the map
* and the datatype from the key.
*
* @author Linke
*
*/
public class SimpleKeyMapperInterceptor implements ConverterInterceptorRecursive {
public static final String DELIMITER = "~_-_~";
private boolean makeSimple = false;
private Map keyMapper = new TreeMap(new SimpleKeyComparator());
public SimpleKeyMapperInterceptor() { }
public SimpleKeyMapperInterceptor(boolean pvMakeSimple) {
setMakeSimple(pvMakeSimple);
}
public void setMakeSimple(boolean pvMakeSimple) { makeSimple = pvMakeSimple; }
public boolean getMakeSimple() { return makeSimple; }
public void beforeConvertRecursion(ConversionContext pvContext) {
if (getMakeSimple() == true) {
toSimple(pvContext);
}
}
public Object beforeConvert(final Object pvConvertObject, final Class pvToType) {
Object lvReturn = null;
if (getMakeSimple() == false) {
Map lvMap = (Map) pvConvertObject;
Map lvOrderedMap = map2SortedMap(lvMap);
Iterator it = lvOrderedMap.entrySet().iterator();
Hashtable lvHashtable = new Hashtable(lvMap.size());
while (it.hasNext()) {
Map.Entry lvMapEntry = (Entry) it.next();
SimpleKeyComparator lvKeyComparator = (SimpleKeyComparator) lvMapEntry.getKey();
Object lvKey = lvKeyComparator.getKey();
Object lvValue = lvMapEntry.getValue();
lvHashtable.put(lvKey, lvValue);
}
lvReturn = lvHashtable;
} else {
lvReturn = pvConvertObject;
}
keyMapper.clear();
return lvReturn;
}
protected void toSimple (ConversionContext pvContext) {
String lvNewKey = null;
if (pvContext.key instanceof Date) {
lvNewKey = Long.toString(((Date) pvContext.key).getTime());
} else {
lvNewKey = pvContext.key.toString();
}
int l = pvContext.key.toString().split(DELIMITER).length;
if (l < 2) {
if (pvContext.key.getClass().equals(String.class)) {
lvNewKey = pvContext.numberOfRecursion + DELIMITER + lvNewKey;
} else {
lvNewKey = pvContext.numberOfRecursion + DELIMITER + lvNewKey + DELIMITER + pvContext.key.getClass().getName();
}
} else {
lvNewKey = pvContext.key.toString();
}
pvContext.key = lvNewKey;
}
protected SimpleKeyComparator toComplex (Object pvKey) {
if ( ! (pvKey instanceof String) ) {
throw new IllegalArgumentException("Expected String, but key is: " + pvKey + " -> class: " + pvKey.getClass().getName());
}
String lvKeyStr = (String) pvKey;
String lvKeyArray[] = lvKeyStr.split(DELIMITER);
if (lvKeyArray.length < 2) {
throw new IllegalArgumentException("The key must contains " +
" the delimiter: " + DELIMITER + " - " + lvKeyStr + " (" + lvKeyArray.length + ")");
}
String lvPosStr = lvKeyArray[0];
Integer integer = Integer.valueOf(lvPosStr);
int lvPos = integer.intValue();
String lvKeyValue = lvKeyArray[1];
Object lvKey = null;
if (lvKeyArray.length == 3) {
String lvKeyClass = lvKeyArray[2];
try {
Class clazz = ReflectionHelper.forName(lvKeyClass);
lvKey = ReflectionHelper.createNewSimpleObject(clazz, lvKeyValue);
} catch (Exception e) {
throw new ConversionException("Can't create a new instance of class: " + lvKeyClass + " with value: " + lvKeyValue);
}
} else {
lvKey = lvKeyValue;
}
return new SimpleKeyComparator(lvPos, lvKey);
}
protected Map map2SortedMap (Map pvMap) {
Iterator it = pvMap.entrySet().iterator();
TreeMap lvTreeMap = new TreeMap(new SimpleKeyComparator());
while (it.hasNext()) {
Map.Entry lvEntry = (Entry) it.next();
Object lvKey = lvEntry.getKey();
Object lvValue = lvEntry.getValue();
SimpleKeyComparator skm = toComplex(lvKey);
lvTreeMap.put(skm, lvValue);
}
return lvTreeMap;
}
public void afterConvertRecursion(ConversionContext pvContext) { }
public Object afterConvert(final Object pvResult, final Class pvToType) { return pvResult; }
public void onError(Exception pvException) { }
private static class SimpleKeyComparator implements Comparator, Serializable {
private static final long serialVersionUID = 2873440526210140656L;
private int pos = -1;
private Object key = null;
public SimpleKeyComparator() {
}
public SimpleKeyComparator(int pvPos, Object pvKey) {
pos = pvPos;
key = pvKey;
}
public int getPos() { return pos; }
public Object getKey() { return key; }
public int compare(Object pvO1, Object pvO2) {
SimpleKeyComparator skm1 = (SimpleKeyComparator) pvO1;
SimpleKeyComparator skm2 = (SimpleKeyComparator) pvO2;
if (skm1.getPos() > skm2.getPos()) {
return -1;
}
else {
return 1;
}
}
}
}
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