/*
* Copyright (c) 2009, Dennis M. Sosnoski. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of
* JiBX nor the names of its contributors may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jibx.util;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.jibx.runtime.IUnmarshallingContext;
import org.jibx.runtime.JiBXException;
import org.jibx.runtime.Utility;
/**
* Support methods for using reflection access to values.
*/
public class ReflectionUtilities
{
/**
* Apply a key/value map to an object instance. This uses reflection to match the keys to either set methods (with
* names of the form setZZZText taking a single String parameter, or setZZZ taking a single String or primitive
* wrapper parameter) or fields (named m_ZZZ). The ZZZ in the names is based on the key name, with hyphenation
* converted to camel case (leading upper camel case, for the method names).
*
* @param map
* @param obj
* @return map for key/values not found in the supplied object
*/
public static Map applyKeyValueMap(Map map, Object obj) {
Map missmap = new HashMap();
for (Iterator iter = map.keySet().iterator(); iter.hasNext();) {
String key = (String)iter.next();
Object value = map.get(key);
boolean fail = true;
Throwable t = null;
try {
// convert key to field and method name, and to alternate method name (used for value sets)
StringBuffer buff = new StringBuffer(key);
for (int i = 0; i < buff.length(); i++) {
char chr = buff.charAt(i);
if (chr == '-') {
buff.deleteCharAt(i);
buff.setCharAt(i, Character.toUpperCase(buff.charAt(i)));
}
}
String fname = "m_" + buff.toString();
buff.setCharAt(0, Character.toUpperCase(buff.charAt(0)));
String mname = "set" + buff.toString();
String altname = mname + "Text";
// first try to find a match for alternate method name, with text value and possibly unmarshaller
Method method = null;
Field field = null;
String tname = null;
Class clas = obj.getClass();
outer: while (!clas.getName().equals("java.lang.Object")) {
Method[] methods = clas.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
Method match = methods[i];
if (altname.equals(match.getName())) {
Class[] types = match.getParameterTypes();
if (types.length == 1 || (types.length == 2 && types[1] == IUnmarshallingContext.class)) {
if (types[0] == String.class) {
tname = String.class.getName();
try {
match.setAccessible(true);
} catch (SecurityException e) { /* deliberately empty */
}
method = match;
break outer;
}
}
}
}
clas = clas.getSuperclass();
}
if (method == null) {
// no match on alternate method name, next check for regular method
clas = obj.getClass();
outer: while (!clas.getName().equals("java.lang.Object")) {
Method[] methods = clas.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
Method match = methods[i];
if (mname.equals(match.getName())) {
Class[] types = match.getParameterTypes();
if (types.length == 1) {
tname = types[0].getName();
try {
match.setAccessible(true);
} catch (SecurityException e) { /* deliberately empty */
}
method = match;
break outer;
}
}
}
clas = clas.getSuperclass();
}
if (method == null) {
// still no match, finally try to find as a field
clas = obj.getClass();
while (!clas.getName().equals("java.lang.Object")) {
try {
field = clas.getDeclaredField(fname);
try {
field.setAccessible(true);
} catch (SecurityException e) { /* deliberately empty */
}
tname = field.getType().getName();
break;
} catch (NoSuchFieldException e) {
clas = clas.getSuperclass();
}
}
if (field == null) {
throw new IllegalArgumentException("Parameter " + key + " not found");
}
}
}
if ("boolean".equals(tname) || "java.lang.Boolean".equals(tname)) {
// convert text to boolean value
if ("true".equals(value) || "1".equals(value)) {
value = Boolean.TRUE;
} else if ("false".equals(value) || "0".equals(value)) {
value = Boolean.FALSE;
} else {
throw new IllegalArgumentException("Unknown value '" + value
+ "' for boolean parameter " + key);
}
} else if ("[Ljava.lang.String;".equals(tname)) {
// deserialize token list to string array
try {
value = org.jibx.runtime.Utility.deserializeTokenList((String)value);
} catch (JiBXException e) {
throw new IllegalArgumentException("Error processing list value + '" + value +
"': " + e.getMessage());
}
} else if ("int".equals(tname) || "java.lang.Integer".equals(tname)) {
// convert text to int value
try {
value = new Integer(Utility.parseInt((String)value));
} catch (JiBXException e) {
throw new IllegalArgumentException("Error processing int value + '" + value +
"': " + e.getMessage());
}
} else if ("long".equals(tname) || "java.lang.Long".equals(tname)) {
// convert text to long value
try {
value = new Long(Utility.parseLong((String)value));
} catch (JiBXException e) {
throw new IllegalArgumentException("Error processing long value + '" + value +
"': " + e.getMessage());
}
} else if ("float".equals(tname) || "java.lang.Float".equals(tname)) {
// convert text to float value
try {
value = new Float(Utility.parseFloat((String)value));
} catch (JiBXException e) {
throw new IllegalArgumentException("Error processing float value + '" + value +
"': " + e.getMessage());
}
} else if ("double".equals(tname) || "java.lang.Double".equals(tname)) {
// convert text to float value
try {
value = new Double(Utility.parseDouble((String)value));
} catch (JiBXException e) {
throw new IllegalArgumentException("Error processing double value + '" + value +
"': " + e.getMessage());
}
} else if (!"java.lang.String".equals(tname)) {
throw new IllegalArgumentException("Cannot handle value of type " + tname);
}
if (method != null) {
// set value using method
if (method.getParameterTypes().length == 1) {
method.invoke(obj, new Object[] { value });
} else {
method.invoke(obj, new Object[] { value, null });
}
} else {
// set value using field
field.set(obj, value);
}
fail = false;
} catch (IllegalAccessException e) {
t = e;
} catch (SecurityException e) {
t = e;
} catch (InvocationTargetException e) {
t = e;
} finally {
if (t != null) {
throw new IllegalArgumentException(t.getMessage());
}
}
if (fail) {
missmap.put(key, value);
}
}
return missmap;
}
}