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org.apache.cxf.jaxrs.utils.ResourceUtils Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cxf.jaxrs.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.logging.Logger;
import javax.ws.rs.CookieParam;
import javax.ws.rs.Encoded;
import javax.ws.rs.FormParam;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.MatrixParam;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.apache.cxf.common.classloader.ClassLoaderUtils;
import org.apache.cxf.common.i18n.BundleUtils;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.helpers.CastUtils;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.jaxrs.lifecycle.SingletonResourceProvider;
import org.apache.cxf.jaxrs.model.ClassResourceInfo;
import org.apache.cxf.jaxrs.model.MethodDispatcher;
import org.apache.cxf.jaxrs.model.OperationResourceInfo;
import org.apache.cxf.jaxrs.model.Parameter;
import org.apache.cxf.jaxrs.model.ParameterType;
import org.apache.cxf.jaxrs.model.URITemplate;
import org.apache.cxf.jaxrs.model.UserOperation;
import org.apache.cxf.jaxrs.model.UserResource;
public final class ResourceUtils {
private static final Logger LOG = LogUtils.getL7dLogger(ResourceUtils.class);
private static final ResourceBundle BUNDLE = BundleUtils.getBundle(ResourceUtils.class);
private ResourceUtils() {
}
public static ClassResourceInfo createClassResourceInfo(
Map resources, UserResource model, boolean isRoot) {
if (model.getName() == null) {
return null;
}
Class sClass = loadClass(model.getName());
ClassResourceInfo cri = new ClassResourceInfo(sClass, sClass, isRoot, true, true);
try {
cri.setResourceProvider(new SingletonResourceProvider(sClass.newInstance()));
} catch (Exception ex) {
throw new RuntimeException("Resource class " + model.getName() + " can not be created");
}
URITemplate t = URITemplate.createTemplate(model.getPath());
cri.setURITemplate(t);
MethodDispatcher md = new MethodDispatcher();
Map ops = model.getOperationsAsMap();
for (Method m : cri.getServiceClass().getMethods()) {
UserOperation op = ops.get(m.getName());
if (op == null || op.getName() == null) {
continue;
}
OperationResourceInfo ori =
new OperationResourceInfo(m, cri, URITemplate.createTemplate(op.getPath()),
op.getVerb(), op.getConsumes(), op.getProduces(),
op.getParameters());
String rClassName = m.getReturnType().getName();
if (op.getVerb() == null) {
if (resources.containsKey(rClassName)) {
ClassResourceInfo subCri = rClassName.equals(model.getName()) ? cri
: createClassResourceInfo(resources, resources.get(rClassName), false);
if (subCri != null) {
cri.addSubClassResourceInfo(subCri);
md.bind(ori, m);
}
}
} else {
md.bind(ori, m);
}
}
cri.setMethodDispatcher(md);
return checkMethodDispatcher(cri) ? cri : null;
}
public static ClassResourceInfo createClassResourceInfo(
final Class rClass, final Class sClass, boolean root, boolean enableStatic) {
ClassResourceInfo cri = new ClassResourceInfo(rClass, sClass, root, enableStatic);
if (root) {
URITemplate t = URITemplate.createTemplate(cri.getPath());
cri.setURITemplate(t);
}
evaluateResourceClass(cri, enableStatic);
return checkMethodDispatcher(cri) ? cri : null;
}
private static void evaluateResourceClass(ClassResourceInfo cri, boolean enableStatic) {
MethodDispatcher md = new MethodDispatcher();
for (Method m : cri.getServiceClass().getMethods()) {
Method annotatedMethod = AnnotationUtils.getAnnotatedMethod(m);
String httpMethod = AnnotationUtils.getHttpMethodValue(annotatedMethod);
Path path = (Path)AnnotationUtils.getMethodAnnotation(annotatedMethod, Path.class);
if (httpMethod != null || path != null) {
md.bind(createOperationInfo(m, annotatedMethod, cri, path, httpMethod), m);
if (httpMethod == null) {
// subresource locator
Class subClass = m.getReturnType();
if (enableStatic) {
ClassResourceInfo subCri = cri.findResource(subClass, subClass);
if (subCri == null) {
subCri = subClass == cri.getServiceClass() ? cri
: createClassResourceInfo(subClass, subClass, false, enableStatic);
}
if (subCri != null) {
cri.addSubClassResourceInfo(subCri);
}
}
}
}
}
cri.setMethodDispatcher(md);
}
public static Constructor findResourceConstructor(Class resourceClass, boolean perRequest) {
List cs = new LinkedList();
for (Constructor c : resourceClass.getConstructors()) {
Class[] params = c.getParameterTypes();
Annotation[][] anns = c.getParameterAnnotations();
boolean match = true;
for (int i = 0; i < params.length; i++) {
if (!perRequest) {
if (AnnotationUtils.getAnnotation(anns[i], Context.class) == null
|| !AnnotationUtils.isContextClass(params[i])) {
match = false;
break;
}
} else if (!AnnotationUtils.isValidParamAnnotations(anns[i])) {
match = false;
break;
}
}
if (match) {
cs.add(c);
}
}
Collections.sort(cs, new Comparator() {
public int compare(Constructor c1, Constructor c2) {
int p1 = c1.getParameterTypes().length;
int p2 = c2.getParameterTypes().length;
return p1 > p2 ? -1 : p1 < p2 ? 1 : 0;
}
});
return cs.size() == 0 ? null : cs.get(0);
}
public static List getParameters(Method resourceMethod) {
Annotation[][] paramAnns = resourceMethod.getParameterAnnotations();
if (paramAnns.length == 0) {
return CastUtils.cast(Collections.emptyList(), Parameter.class);
}
List params = new ArrayList(paramAnns.length);
for (int i = 0; i < paramAnns.length; i++) {
Parameter p = getParameter(i, paramAnns[i]);
params.add(p);
}
return params;
}
public static Parameter getParameter(int index, Annotation[] anns) {
Context ctx = AnnotationUtils.getAnnotation(anns, Context.class);
if (ctx != null) {
return new Parameter(ParameterType.CONTEXT, index, null);
}
boolean isEncoded = AnnotationUtils.getAnnotation(anns, Encoded.class) != null;
String dValue = AnnotationUtils.getDefaultParameterValue(anns);
Parameter p = null;
PathParam a = AnnotationUtils.getAnnotation(anns, PathParam.class);
if (a != null) {
p = new Parameter(ParameterType.PATH, index, a.value(), isEncoded, dValue);
}
if (p == null) {
QueryParam q = AnnotationUtils.getAnnotation(anns, QueryParam.class);
if (q != null) {
p = new Parameter(ParameterType.QUERY, index, q.value(), isEncoded, dValue);
}
}
if (p != null) {
return p;
}
MatrixParam m = AnnotationUtils.getAnnotation(anns, MatrixParam.class);
if (m != null) {
return new Parameter(ParameterType.MATRIX, index, m.value(), isEncoded, dValue);
}
FormParam f = AnnotationUtils.getAnnotation(anns, FormParam.class);
if (f != null) {
return new Parameter(ParameterType.FORM, index, f.value(), isEncoded, dValue);
}
HeaderParam h = AnnotationUtils.getAnnotation(anns, HeaderParam.class);
if (h != null) {
return new Parameter(ParameterType.HEADER, index, h.value(), isEncoded, dValue);
}
p = null;
CookieParam c = AnnotationUtils.getAnnotation(anns, CookieParam.class);
if (c != null) {
p = new Parameter(ParameterType.COOKIE, index, c.value(), isEncoded, dValue);
} else {
p = new Parameter(ParameterType.REQUEST_BODY, index, null);
}
return p;
}
private static OperationResourceInfo createOperationInfo(Method m, Method annotatedMethod,
ClassResourceInfo cri, Path path, String httpMethod) {
OperationResourceInfo ori = new OperationResourceInfo(m, annotatedMethod, cri);
URITemplate t = URITemplate.createTemplate(path);
ori.setURITemplate(t);
ori.setHttpMethod(httpMethod);
return ori;
}
private static boolean checkMethodDispatcher(ClassResourceInfo cr) {
if (cr.getMethodDispatcher().getOperationResourceInfos().isEmpty()) {
LOG.warning(new org.apache.cxf.common.i18n.Message("NO_RESOURCE_OP_EXC",
BUNDLE,
cr.getServiceClass().getName()).toString());
return false;
}
return true;
}
private static Class loadClass(String cName) {
try {
return ClassLoaderUtils.loadClass(cName.trim(), ResourceUtils.class);
} catch (ClassNotFoundException ex) {
throw new RuntimeException("No class " + cName.trim() + " can be found", ex);
}
}
public static List getUserResources(String loc) {
try {
InputStream is = null;
if (loc.startsWith("classpath:")) {
String path = loc.substring("classpath:".length());
is = ResourceUtils.class.getResourceAsStream(path);
} else {
File f = new File(loc);
if (f.exists()) {
is = new FileInputStream(f);
}
}
if (is == null) {
LOG.warning("No user model is available at " + loc);
return null;
}
return getUserResources(is);
} catch (Exception ex) {
LOG.warning("Problem with processing a user model at " + loc);
}
return null;
}
public static List getUserResources(InputStream is) throws Exception {
Document doc = DOMUtils.readXml(new InputStreamReader(is, "UTF-8"));
return getResourcesFromElement(doc.getDocumentElement());
}
public static List getResourcesFromElement(Element modelEl) {
List resources = new ArrayList();
List resourceEls =
DOMUtils.findAllElementsByTagNameNS(modelEl,
"http://cxf.apache.org/jaxrs", "resource");
for (Element e : resourceEls) {
resources.add(getResourceFromElement(e));
}
return resources;
}
private static UserResource getResourceFromElement(Element e) {
UserResource resource = new UserResource();
resource.setName(e.getAttribute("name"));
resource.setPath(e.getAttribute("path"));
List operEls =
DOMUtils.findAllElementsByTagNameNS(e,
"http://cxf.apache.org/jaxrs", "operation");
List opers = new ArrayList(operEls.size());
for (Element operEl : operEls) {
opers.add(getOperationFromElement(operEl));
}
resource.setOperations(opers);
return resource;
}
private static UserOperation getOperationFromElement(Element e) {
UserOperation op = new UserOperation();
op.setName(e.getAttribute("name"));
op.setVerb(e.getAttribute("verb"));
op.setPath(e.getAttribute("path"));
op.setConsumes(e.getAttribute("consumes"));
op.setProduces(e.getAttribute("produces"));
List paramEls =
DOMUtils.findAllElementsByTagNameNS(e,
"http://cxf.apache.org/jaxrs", "param");
List params = new ArrayList(paramEls.size());
for (Element paramEl : paramEls) {
Parameter p = new Parameter(paramEl.getAttribute("type"), paramEl.getAttribute("name"));
p.setEncoded(Boolean.valueOf(paramEl.getAttribute("encoded")));
p.setDefaultValue(paramEl.getAttribute("default"));
params.add(p);
}
op.setParameters(params);
return op;
}
}
