--- /dev/null
+package org.argeo.slc.core.execution.xml;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.slc.SlcException;
+import org.argeo.slc.core.execution.DefaultExecutionFlow;
+import org.argeo.slc.execution.ExecutionFlow;
+import org.springframework.beans.factory.BeanDefinitionStoreException;
+import org.springframework.beans.factory.config.RuntimeBeanReference;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.ManagedList;
+import org.springframework.beans.factory.support.ManagedMap;
+import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.util.StringUtils;
+import org.springframework.util.xml.DomUtils;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+/** Interprets the <flow:flow> tag */
+public class FlowBeanDefinitionParser extends
+ AbstractSingleBeanDefinitionParser {
+ private Log log = LogFactory.getLog(FlowBeanDefinitionParser.class);
+
+ /** Whether the user has already be warned on path attribute usage. */
+ private Boolean warnedAboutPathAttribute = false;
+
+ @Override
+ protected void doParse(Element element, ParserContext parserContext,
+ BeanDefinitionBuilder builder) {
+ String path = element.getAttribute("path");
+ if (StringUtils.hasText(path)) {
+ builder.addPropertyValue("path", path);
+
+ // warns user only once
+ if (!warnedAboutPathAttribute)
+ log.warn("The path=\"\" attribute is deprecated"
+ + " and will be removed in a later release."
+ + " Use <flow:flow name=\"/my/path/flowName\">.");
+ warnedAboutPathAttribute = true;
+ }
+
+ String spec = element.getAttribute("spec");
+ if (StringUtils.hasText(spec))
+ builder.getBeanDefinition().getConstructorArgumentValues()
+ .addGenericArgumentValue(new RuntimeBeanReference(spec));
+
+ String abstrac = element.getAttribute("abstract");
+ if (StringUtils.hasText(abstrac))
+ builder.setAbstract(Boolean.parseBoolean(abstrac));
+
+ String parent = element.getAttribute("parent");
+ if (StringUtils.hasText(parent))
+ builder.setParentName(parent);
+
+ builder.getBeanDefinition().setDescription(
+ DomUtils.getChildElementValueByTagName(element, "description"));
+
+ List<Element> argsElems = new ArrayList<Element>();
+ List<Element> execElems = new ArrayList<Element>();
+ List<Element> specElems = new ArrayList<Element>();
+ NodeList nodeList = element.getChildNodes();
+ for (int i = 0; i < nodeList.getLength(); i++) {
+ Node node = nodeList.item(i);
+ if (node instanceof Element) {
+ if (DomUtils.nodeNameEquals(node, "arg"))
+ argsElems.add((Element) node);
+ else if (DomUtils.nodeNameEquals(node, "spec"))
+ specElems.add((Element) node);
+ else if (!DomUtils.nodeNameEquals(node, "description"))
+ execElems.add((Element) node);
+ }
+ }
+
+ // Arguments
+ if (argsElems.size() != 0) {
+ ManagedMap<String, Object> args = new ManagedMap<String, Object>(
+ argsElems.size());
+ for (Element argElem : argsElems) {
+ Object value = NamespaceUtils.parseValue(argElem,
+ parserContext, builder.getBeanDefinition(), null);
+ if (value != null)
+ args.put(argElem.getAttribute("name"), value);
+ else
+ throw new SlcException("No value defined.");
+ }
+ builder.getBeanDefinition().getConstructorArgumentValues()
+ .addGenericArgumentValue(args);
+ }
+
+ // Execution specs
+ if (StringUtils.hasText(spec) && specElems.size() != 0)
+ throw new SlcException("A flow cannot have multiple specs");
+ if (specElems.size() == 1) {
+ Object specObj = NamespaceUtils.parseBeanOrReference(
+ specElems.get(0), parserContext,
+ builder.getBeanDefinition());
+ builder.getBeanDefinition().getConstructorArgumentValues()
+ .addGenericArgumentValue(specObj);
+ } else if (specElems.size() > 1)
+ throw new SlcException("A flow cannot have multiple specs");
+
+ // Executables
+ if (execElems.size() != 0) {
+ ManagedList<Object> executables = new ManagedList<Object>(
+ execElems.size());
+ for (Element child : execElems) {
+ // child validity check is performed in xsd
+ executables.add(NamespaceUtils.parseBeanOrReference(child,
+ parserContext, builder.getBeanDefinition()));
+ }
+ if (executables.size() > 0)
+ builder.addPropertyValue("executables", executables);
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ protected Class<? extends ExecutionFlow> getBeanClass(Element element) {
+ String clss = element.getAttribute("class");
+ if (StringUtils.hasText(clss))
+ // TODO: check that it actually works
+ try {
+ return (Class<? extends ExecutionFlow>) getClass()
+ .getClassLoader().loadClass(clss);
+ } catch (ClassNotFoundException e) {
+ try {
+ return (Class<? extends ExecutionFlow>) Thread
+ .currentThread().getContextClassLoader()
+ .loadClass(clss);
+ } catch (ClassNotFoundException e1) {
+ throw new SlcException("Cannot load class " + clss, e);
+ }
+ }
+ else
+ return DefaultExecutionFlow.class;
+ }
+
+ // parse nested bean definition
+ // private Object parseBeanReference(Element element,
+ // ParserContext parserContext, BeanDefinitionBuilder builder) {
+ // return parserContext.getDelegate().parsePropertySubElement(element,
+ // builder.getBeanDefinition());
+ // }
+
+ @Override
+ protected String resolveId(Element element,
+ AbstractBeanDefinition definition, ParserContext parserContext)
+ throws BeanDefinitionStoreException {
+ String name = element.getAttribute("name");
+ if (StringUtils.hasText(name)) {
+ return name;
+ } else {
+ return super.resolveId(element, definition, parserContext);
+ }
+ }
+
+ protected boolean shouldGenerateIdAsFallback() {
+ return true;
+ }
+
+}
projects / gpl / argeo-slc.git / blobdiff