/*
* Milyn - Copyright (C) 2006 - 2011
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License (version 2.1) as published by the Free Software
* Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License for more details:
* http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.javabean.binding.model;
import org.milyn.cdr.ParameterAccessor;
import org.milyn.cdr.SmooksConfigurationException;
import org.milyn.cdr.SmooksResourceConfiguration;
import org.milyn.cdr.SmooksResourceConfigurationList;
import org.milyn.cdr.xpath.SelectorStep;
import org.milyn.cdr.xpath.SelectorStepBuilder;
import org.milyn.container.ApplicationContext;
import org.milyn.db.TransactionManagerType;
import org.milyn.javabean.BeanInstanceCreator;
import org.milyn.javabean.BeanInstancePopulator;
import org.milyn.javabean.DataDecoder;
import org.milyn.util.DollarBraceDecoder;
import org.milyn.xml.NamespaceMappings;
import javax.xml.namespace.QName;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
/**
* Bean binding model set.
*
* @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
*/
public class ModelSet {
/**
* ModelSet base beans.
* <p/>
* A Smooks configuration can have multiple <jb:baseBeans> that can be wired together
* in all sorts of ways to create models. This is a Map of these baseBeans. These
* baseBeans are used (cloned) to create all possible models (with baseBeans all wired together).
*/
private Map<String, Bean> baseBeans = new LinkedHashMap<String, Bean>();
/**
* Models.
* <p/>
* Should contain clones of the same baseBeans as in the baseBeans property (above), but
* with their full graphs expanded i.e. all the bean wirings resolved and wired into
* parent baseBeans etc.
*/
private Map<String, Bean> models = new LinkedHashMap<String, Bean>();
/**
* Is the associated Smooks instance a binding only configuration.
*/
private Boolean isBindingOnlyConfig;
private ModelSet(SmooksResourceConfigurationList userConfigList) throws SmooksConfigurationException {
createBaseBeanMap(userConfigList);
createExpandedModels();
resolveModelSelectors(userConfigList);
}
public Bean getModel(String beanId) {
return models.get(beanId);
}
public Bean getModel(Class<?> beanType) {
for(Bean model : models.values()) {
if(model.getCreator().getBeanRuntimeInfo().getPopulateType() == beanType) {
return model;
}
}
return null;
}
public Map<String, Bean> getModels() {
return models;
}
public boolean isBindingOnlyConfig() {
return isBindingOnlyConfig;
}
private void createBaseBeanMap(SmooksResourceConfigurationList userConfigList) {
for(int i = 0; i < userConfigList.size(); i++) {
SmooksResourceConfiguration config = userConfigList.get(i);
Object javaResource = config.getJavaResourceObject();
if(javaResource instanceof BeanInstanceCreator) {
BeanInstanceCreator beanCreator = (BeanInstanceCreator) javaResource;
Bean bean = new Bean(beanCreator).setCloneable(true);
baseBeans.put(bean.getBeanId(), bean);
if(isBindingOnlyConfig == null) {
isBindingOnlyConfig = true;
}
} else if(javaResource instanceof BeanInstancePopulator) {
BeanInstancePopulator beanPopulator = (BeanInstancePopulator) javaResource;
Bean bean = baseBeans.get(beanPopulator.getBeanId());
if(bean == null) {
throw new SmooksConfigurationException("Unexpected binding configuration exception. Unknown parent beanId '' for binding configuration.");
}
if(beanPopulator.isBeanWiring()) {
bean.getBindings().add(new WiredBinding(beanPopulator));
} else {
bean.getBindings().add(new DataBinding(beanPopulator));
}
} else if(isNonBindingResource(javaResource) && !isGlobalParamsConfig(config)) {
// The user has configured something other than a bean binding config.
isBindingOnlyConfig = false;
}
}
}
private boolean isNonBindingResource(Object javaResource) {
if(javaResource instanceof DataDecoder) {
return false;
}
// Ignore resource that do not manipulate the event stream...
if(javaResource instanceof NamespaceMappings) {
return false;
}
return true;
}
private boolean isGlobalParamsConfig(SmooksResourceConfiguration config) {
return ParameterAccessor.GLOBAL_PARAMETERS.equals(config.getSelector());
}
private void createExpandedModels() {
for(Bean bean : baseBeans.values()) {
models.put(bean.getBeanId(), bean.clone(baseBeans, null));
}
}
private void resolveModelSelectors(SmooksResourceConfigurationList userConfigList) {
// Do the beans first...
for(Bean model : models.values()) {
resolveModelSelectors(model);
}
// Now run over all configs.. there may be router configs etc using hashed selectors...
for(int i = 0; i < userConfigList.size(); i++) {
expandSelector(userConfigList.get(i), false, null);
}
}
private void resolveModelSelectors(Bean model) {
SmooksResourceConfiguration beanConfig = model.getConfig();
expandSelector(beanConfig, true, null);
for(Binding binding : model.getBindings()) {
SmooksResourceConfiguration bindingConfig = binding.getConfig();
expandSelector(bindingConfig, true, beanConfig);
if(binding instanceof WiredBinding) {
resolveModelSelectors(((WiredBinding) binding).getWiredBean());
}
}
}
private void expandSelector(SmooksResourceConfiguration resourceConfiguration, boolean failOnMissingBean, SmooksResourceConfiguration context) {
SelectorStep[] selectorSteps = resourceConfiguration.getSelectorSteps();
QName targetElement = selectorSteps[0].getTargetElement();
if(targetElement == null) {
return;
}
String localPart = targetElement.getLocalPart();
if(localPart.equals("#") && context != null) {
resourceConfiguration.setSelectorSteps(concat(context.getSelectorSteps(), selectorSteps));
return;
}
List<String> dollarBraceTokens = DollarBraceDecoder.getTokens(localPart);
if(dollarBraceTokens.size() == 1) {
String beanId = dollarBraceTokens.get(0);
Bean bean = baseBeans.get(beanId);
if(bean != null) {
resourceConfiguration.setSelectorSteps(concat(bean.getConfig().getSelectorSteps(), selectorSteps));
} else if(failOnMissingBean) {
throw new SmooksConfigurationException("Invalid selector '" + SelectorStepBuilder.toString(selectorSteps) + "'. Unknown beanId '" + beanId + "'.");
}
}
}
private SelectorStep[] concat(SelectorStep[] context, SelectorStep[] beanSelectorSteps) {
SelectorStep[] newSteps = new SelectorStep[context.length + beanSelectorSteps.length - 1];
System.arraycopy(context, 0, newSteps, 0, context.length);
System.arraycopy(beanSelectorSteps, 1, newSteps, context.length, beanSelectorSteps.length - 1);
return newSteps;
}
public static void build(ApplicationContext appContext) {
ModelSet modelSet = get(appContext);
if(modelSet == null) {
modelSet = new ModelSet(appContext.getStore().getUserDefinedResourceList());
appContext.setAttribute(ModelSet.class, modelSet);
}
}
public static ModelSet get(ApplicationContext appContext) {
return (ModelSet) appContext.getAttribute(ModelSet.class);
}
}