/*
* Copyright (C) 2005 Joe Walnes.
* Copyright (C) 2006, 2007, 2008 XStream Committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*
* Created on 22. January 2005 by Joe Walnes
*/
package com.thoughtworks.xstream.mapper;
import com.thoughtworks.xstream.alias.ClassMapper;
import java.util.Arrays;
import java.util.Collection;
/**
* Mapper that detects arrays and changes the name so it can identified as an array
* (for example Foo[] gets serialized as foo-array). Supports multi-dimensional arrays.
*
* @author Joe Walnes
*/
public class ArrayMapper extends MapperWrapper {
private final static Collection BOXED_TYPES = Arrays.asList(
new Class[] {
Boolean.class,
Byte.class,
Character.class,
Short.class,
Integer.class,
Long.class,
Float.class,
Double.class
});
public ArrayMapper(Mapper wrapped) {
super(wrapped);
}
/**
* @deprecated As of 1.2, use {@link #ArrayMapper(Mapper)}
*/
public ArrayMapper(ClassMapper wrapped) {
this((Mapper)wrapped);
}
public String serializedClass(Class type) {
StringBuffer arraySuffix = new StringBuffer();
String name = null;
while (type.isArray()) {
name = super.serializedClass(type);
if (type.getName().equals(name)) {
type = type.getComponentType();
arraySuffix.append("-array");
name = null;
} else {
break;
}
}
if (name == null) {
name = boxedTypeName(type);
}
if (name == null) {
name = super.serializedClass(type);
}
if (arraySuffix.length() > 0) {
return name + arraySuffix;
} else {
return name;
}
}
public Class realClass(String elementName) {
int dimensions = 0;
// strip off "-array" suffix
while (elementName.endsWith("-array")) {
elementName = elementName.substring(0, elementName.length() - 6); // cut off -array
++dimensions;
}
if (dimensions > 0) {
Class componentType = primitiveClassNamed(elementName);
if (componentType == null) {
componentType = super.realClass(elementName);
}
while (componentType.isArray()) {
componentType = componentType.getComponentType();
++dimensions;
}
return super.realClass(arrayType(dimensions, componentType));
} else {
return super.realClass(elementName);
}
}
private String arrayType(int dimensions, Class componentType) {
StringBuffer className = new StringBuffer();
for (int i = 0; i < dimensions; i++) {
className.append('[');
}
if (componentType.isPrimitive()) {
className.append(charThatJavaUsesToRepresentPrimitiveArrayType(componentType));
return className.toString();
} else {
className.append('L').append(componentType.getName()).append(';');
return className.toString();
}
}
private Class primitiveClassNamed(String name) {
return
name.equals("void") ? Void.TYPE :
name.equals("boolean") ? Boolean.TYPE :
name.equals("byte") ? Byte.TYPE :
name.equals("char") ? Character.TYPE :
name.equals("short") ? Short.TYPE :
name.equals("int") ? Integer.TYPE :
name.equals("long") ? Long.TYPE :
name.equals("float") ? Float.TYPE :
name.equals("double") ? Double.TYPE :
null;
}
private char charThatJavaUsesToRepresentPrimitiveArrayType(Class primvCls) {
return
(primvCls == boolean.class) ? 'Z' :
(primvCls == byte.class) ? 'B' :
(primvCls == char.class) ? 'C' :
(primvCls == short.class) ? 'S' :
(primvCls == int.class) ? 'I' :
(primvCls == long.class) ? 'J' :
(primvCls == float.class) ? 'F' :
(primvCls == double.class) ? 'D' :
0;
}
private String boxedTypeName(Class type) {
return BOXED_TYPES.contains(type) ? type.getName() : null;
}
}