public XMLPageManifestLoader(String basePath, Collection<String> activeProfiles) {
this.basePath = basePath;
this.activeProfiles = activeProfiles;
try {
documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
SERVICE_LOADER.forEach(resourcesReaders::add);
xPath = XPathFactory.newInstance().newXPath();
importsExpr = xPath.compile("/manifest/import");
viewsExpr = xPath.compile("/manifest/view");
resourcesExpr = xPath.compile("/manifest/resources");
fragmentsExpr = xPath.compile("/manifest/fragment");
selectorExpr = xPath.compile("/manifest/@selector");
} catch (ParserConfigurationException | XPathExpressionException e) {
throw new JumbleException("Fail to initialize manifest loader", e);
}
}
/** Created by Hatis on 15.09.2015. */
public class XMLPageManifestLoader implements PageManifestLoader {
private static final ServiceLoader<ResourceReader> SERVICE_LOADER =
ServiceLoader.load(ResourceReader.class);
private Collection<ResourceReader> resourcesReaders = new ArrayList<>();
private XPathExpression resourcesExpr;
private XPathExpression viewsExpr;
private XPathExpression importsExpr;
private XPathExpression fragmentsExpr;
private XPathExpression selectorExpr;
private Collection<XPathExpression> fragmentRefExpressions = new ArrayList<>();
private Collection<XPathExpression> resourcesRefExpressions = new ArrayList<>();
private String basePath;
private final Collection<String> activeProfiles;
private Set<String> loadedFiles;
private DocumentBuilder documentBuilder;
private XPath xPath;
public XMLPageManifestLoader(String basePath, Collection<String> activeProfiles) {
this.basePath = basePath;
this.activeProfiles = activeProfiles;
try {
documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
SERVICE_LOADER.forEach(resourcesReaders::add);
xPath = XPathFactory.newInstance().newXPath();
importsExpr = xPath.compile("/manifest/import");
viewsExpr = xPath.compile("/manifest/view");
resourcesExpr = xPath.compile("/manifest/resources");
fragmentsExpr = xPath.compile("/manifest/fragment");
selectorExpr = xPath.compile("/manifest/@selector");
} catch (ParserConfigurationException | XPathExpressionException e) {
throw new JumbleException("Fail to initialize manifest loader", e);
}
}
public XMLPageManifestLoader(Collection<String> activeProfiles) {
this("classpath:", activeProfiles);
}
public XMLPageManifestLoader() {
this("classpath:", null);
}
public void addResourceReader(ResourceReader reader) {
resourcesReaders.add(reader);
}
public void addResourceReaders(Collection<ResourceReader> readers) {
resourcesReaders.addAll(readers);
}
// load
@Override
public synchronized PageManifest load(String manifestPath, String... alsoLoadProfiles) {
try {
loadedFiles = new HashSet<>();
createProfilesXPath(alsoLoadProfiles);
PageManifestDef pmd = loadRootPageDefinition(manifestPath);
return new PageManifestBuilder().buildManifest(pmd);
} catch (ManifestNotFound e) {
return null;
} catch (ParserConfigurationException
| SAXException
| IOException
| XPathExpressionException e) {
throw new PageManifestLoadingException("Fail to load page manifest: " + manifestPath, e);
}
}
private void createProfilesXPath(String... alsoLoadProfiles) throws XPathExpressionException {
fragmentRefExpressions.add(xPath.compile("fragment"));
resourcesRefExpressions.add(xPath.compile("resources"));
for (String profile : activeProfiles) {
fragmentRefExpressions.add(xPath.compile("profile[@name='" + profile + "']/fragment"));
resourcesRefExpressions.add(xPath.compile("profile[@name='" + profile + "']/resources"));
}
for (String profile : alsoLoadProfiles) {
fragmentRefExpressions.add(xPath.compile("profile[@name='" + profile + "']/fragment"));
resourcesRefExpressions.add(xPath.compile("profile[@name='" + profile + "']/resources"));
}
}
private PageManifestDef loadRootPageDefinition(String manifestPathOrPath)
throws ParserConfigurationException, SAXException, XPathExpressionException, IOException {
PageManifestDef pmd = new PageManifestDef();
Document document = readPageDefinitionFile(manifestPathOrPath, pmd);
pmd.setSelectorStrategy(selectorExpr.evaluate(document));
return pmd;
}
private Document readPageDefinitionFile(String manifestPathOrPath, PageManifestDef pmd) {
FileScope fileScope = new FileScope(basePath, manifestPathOrPath);
// prevent cycle import
if (loadedFiles.contains(fileScope.getFullPath())) return null;
String filePath = fileScope.getFullPath();
try {
InputStream is = FileUtils.openStream(filePath);
if (is == null)
throw new JumbleException("Cant open file stream: " + fileScope.getFullPath());
Document document = documentBuilder.parse(is);
loadedFiles.add(fileScope.getFullPath());
new PageManifestReader().read(fileScope, document, pmd);
return document;
} catch (FileNotFoundException e) {
throw new ManifestNotFound("File not found: " + filePath);
} catch (XPathExpressionException | IOException | SAXException e) {
throw new PageManifestLoadingException("Cant read file: " + filePath, e);
}
}
// read
class PageManifestReader {
private FileScope fileScope;
public PageManifestDef read(FileScope fileScope, Document document, PageManifestDef pmd)
throws XPathExpressionException {
this.fileScope = fileScope;
XmlUtils.iterateSubElements(
document, resourcesExpr, e -> pmd.addResourceSet(readResourcesDefinition(e)));
XmlUtils.iterateSubElements(
document, fragmentsExpr, e -> pmd.addFragments(readFragmentDefinition(e)));
XmlUtils.iterateSubElements(document, viewsExpr, e -> pmd.addView(readViewDefinition(e)));
List<String> imports =
XmlUtils.getSingleAttrNodes(
document, importsExpr, "file", "import tag must contain file attribute");
imports
.stream()
.forEach(
i ->
XMLPageManifestLoader.this.readPageDefinitionFile(
fileScope.getRelativePath(i), pmd));
return pmd;
}
private ViewDefinition readViewDefinition(Element element) {
String name = element.getAttribute("name");
Assert.ifEmpty(name, "can`t read view without name");
String extend = element.getAttribute("extend");
String file = element.getAttribute("file");
if (isNoneEmpty(file)) file = fileScope.getRelativePath(file);
ViewDefinition viewDef = new ViewDefinition(name, file);
viewDef.setExtend(extend);
fragmentRefExpressions.forEach(
x -> {
XmlUtils.iterateSubElements(
element, x, e -> viewDef.addFragment(readFragmentReference(e)));
});
resourcesRefExpressions.forEach(
x -> {
XmlUtils.iterateSubElements(
element, x, e -> viewDef.addResources(readResourcesReference(e)));
});
return viewDef;
}
private FragmentDef readFragmentDefinition(Element element) {
String name = element.getAttribute("name");
Assert.ifEmpty(name, "can`t read resources bundle without name");
String file = element.getAttribute("file");
if (isNoneEmpty(file)) file = fileScope.getRelativePath(file);
Assert.ifEmpty(file, "fragment definition must contain file attribute");
FragmentDef fragmentDef = new FragmentDef(name, file);
readFragmentInnerContent(element, fragmentDef);
return fragmentDef;
}
private FragmentReferenceDef readFragmentReference(Element element) {
String name = element.getAttribute("name");
Assert.ifEmpty(name, "can`t read fragment without name");
String file = element.getAttribute("file");
if (isNoneEmpty(file)) file = fileScope.getRelativePath(file);
FragmentReferenceDef fragmentDef = new FragmentReferenceDef(name, file);
String layout = element.getAttribute("layout");
fragmentDef.setLayout(layout);
readFragmentInnerContent(element, fragmentDef);
return fragmentDef;
}
private void readFragmentInnerContent(Element element, FragmentDef fragmentDef) {
fragmentRefExpressions.forEach(
x -> {
XmlUtils.iterateSubElements(
element, x, e -> fragmentDef.addInnerFragment(readFragmentReference(e)));
});
resourcesRefExpressions.forEach(
x -> {
XmlUtils.iterateSubElements(
element, x, e -> fragmentDef.addResources(readResourcesReference(e)));
});
}
private ResourcesDef readResourcesReference(Element resourcesElement) {
String name = resourcesElement.getAttribute("name");
ResourcesDef resDef = new ResourcesDef(name);
readResources(resourcesElement, resDef);
return resDef;
}
private ResourcesDef readResourcesDefinition(Element resourcesElement) {
String name = resourcesElement.getAttribute("name");
Assert.ifEmpty(name, "can`t read resources bundle without name");
ResourcesDef resDef = new ResourcesDef(name);
String depends = resourcesElement.getAttribute("depends");
if (isNoneEmpty(depends)) {
resDef.setDepends(
Arrays.stream(StringUtils.split(depends, ","))
.map(StringUtils::trim)
.collect(Collectors.toList()));
}
readResources(resourcesElement, resDef);
return resDef;
}
private void readResources(Element resourcesElement, ResourcesDef resDef) {
XmlUtils.iterateSubElements(
resourcesElement,
element -> {
XmlManifestResourceElement resourceElement = new XmlManifestResourceElement(element);
Optional<ResourceReader> optional =
resourcesReaders
.stream()
.filter(reader -> reader.accept(resourceElement))
.findFirst();
try {
if (optional.isPresent())
resDef.addResource(optional.get().read(resourceElement, fileScope));
} catch (Exception e) {
throw new JumbleException("Fail to load resource: " + element.getTagName(), e);
}
});
}
}
}
