Author: DartPeng Date: 2011-02-16 04:13:42 -0500 (Wed, 16 Feb 2011) New Revision: 29167 Added: trunk/smooks/plugins/org.jboss.tools.smooks.ui/src/org/jboss/tools/smooks/launch/JavaGraphBuilder.java Log: JBIDE-7509 Miss this class Added: trunk/smooks/plugins/org.jboss.tools.smooks.ui/src/org/jboss/tools/smooks/launch/JavaGraphBuilder.java =================================================================== --- trunk/smooks/plugins/org.jboss.tools.smooks.ui/src/org/jboss/tools/smooks/launch/JavaGraphBuilder.java (rev 0) +++ trunk/smooks/plugins/org.jboss.tools.smooks.ui/src/org/jboss/tools/smooks/launch/JavaGraphBuilder.java 2011-02-16 09:13:42 UTC (rev 29167) @@ -0,0 +1,131 @@ +package org.jboss.tools.smooks.launch; + +import java.lang.reflect.Array; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.ParameterizedType; +import java.lang.reflect.Type; +import java.util.ArrayList; +import java.util.Collection; +import java.util.EnumSet; +import java.util.HashMap; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import javax.xml.transform.Transformer; +import javax.xml.transform.TransformerConfigurationException; +import javax.xml.transform.TransformerException; +import javax.xml.transform.TransformerFactory; +import javax.xml.transform.dom.DOMResult; +import javax.xml.transform.dom.DOMSource; +import javax.xml.transform.stream.StreamResult; + +import org.milyn.Smooks; +import org.milyn.payload.JavaSource; +import org.w3c.dom.Document; + +public class JavaGraphBuilder { + + public <T> T buildGraph(Class<T> messageType) { + try { + return buildObject(messageType); + } catch (Exception e) { + e.printStackTrace(); + throw new IllegalArgumentException("Unable to construct an instance of '" + messageType.getName() + "'", e); + } + } + + @SuppressWarnings("unchecked") + private <T> T buildObject(Class<T> objectType) throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException { + + if(String.class.isAssignableFrom(objectType)) { + return objectType.cast("x"); + } else if(Number.class.isAssignableFrom(objectType)) { + return objectType.getConstructor(String.class).newInstance("1"); + } else if(objectType.isPrimitive()) { + return (T) primitiveToObjectMap.get(objectType); + } else if(objectType == Object.class) { + // don't construct raw Object types... leave them and just return null... + return null; + } else if(objectType.isEnum()) { + return (T) EnumSet.allOf((Class<Enum>)objectType).iterator().next(); + } + + T messageInstance = objectType.newInstance(); + + // populate all the fields... + Method[] methods = objectType.getMethods(); + for(Method method : methods) { + if(method.getName().startsWith("set") && method.getParameterTypes().length == 1) { + Class<?> propertyType = method.getParameterTypes()[0]; + Object propertyInstance = null; + + if(Collection.class.isAssignableFrom(propertyType)) { + propertyInstance = buildCollection(method, propertyType); + } else if(propertyType.isArray()) { + propertyInstance = buildArray(method, propertyType); + } else { + propertyInstance = buildObject(propertyType); + } + + if(propertyInstance != null) { + method.invoke(messageInstance, propertyInstance); + } + } + } + + return messageInstance; + } + + private Object buildArray(Method method, Class<?> propertyType) throws ArrayIndexOutOfBoundsException, IllegalArgumentException, IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException { + Class<?> arrayType = propertyType.getComponentType(); + Object[] arrayObj = (Object[]) Array.newInstance(arrayType, 1); + + Array.set(arrayObj, 0, buildObject(arrayType)); + + return arrayObj; + } + + private Object buildCollection(Method method, Class<?> propertyType) throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException { + Type genericType = method.getGenericParameterTypes()[0]; + + if(genericType instanceof ParameterizedType) { + ParameterizedType genericTypeClass = (ParameterizedType) genericType; + Collection collection = null; + + if(!propertyType.isInterface()) { + // It's a concrete Collection type... just create an instance... + collection = (Collection) propertyType.newInstance(); + }else if(List.class.isAssignableFrom(propertyType)) { + collection = new ArrayList(); + } else if(Set.class.isAssignableFrom(propertyType)) { + collection = new LinkedHashSet(); + } + + if(collection != null) { + collection.add(buildObject((Class<Object>) genericTypeClass.getActualTypeArguments()[0])); + return collection; + } + } + + return null; + } + + private static final Map<Class, Object> primitiveToObjectMap; + + static { + primitiveToObjectMap = new HashMap<Class, Object>(); + primitiveToObjectMap.put(int.class, 1); + primitiveToObjectMap.put(long.class, 1L); + primitiveToObjectMap.put(boolean.class, true); + primitiveToObjectMap.put(float.class, 1f); + primitiveToObjectMap.put(double.class, 1d); + primitiveToObjectMap.put(char.class, '1'); + primitiveToObjectMap.put(byte.class, Byte.parseByte("1")); + primitiveToObjectMap.put(short.class, 1); + } + +} +