package aQute.bnd.component;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.osgi.service.component.annotations.ConfigurationPolicy;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;
import org.osgi.service.component.annotations.ReferencePolicyOption;
import org.osgi.service.component.annotations.ServiceScope;
import aQute.bnd.component.error.DeclarativeServicesAnnotationError;
import aQute.bnd.component.error.DeclarativeServicesAnnotationError.ErrorType;
import aQute.bnd.osgi.Analyzer;
import aQute.bnd.osgi.ClassDataCollector;
import aQute.bnd.osgi.Clazz;
import aQute.bnd.osgi.Clazz.MethodDef;
import aQute.bnd.osgi.Constants;
import aQute.bnd.osgi.Descriptors.TypeRef;
import aQute.bnd.osgi.Processor;
import aQute.bnd.osgi.Verifier;
import aQute.bnd.version.Version;
import aQute.lib.tag.Tag;
public class HeaderReader extends Processor {
final static Pattern PROPERTY_PATTERN = Pattern
.compile("(([^=:@]+)([:@](Boolean|Byte|Char|Short|Integer|Long|Float|Double|String))?)\\s*=(.*)");
private final static Set<String> LIFECYCLE_METHODS = new HashSet<String>(
Arrays.asList("activate", "deactivate", "modified"));
private final Analyzer analyzer;
private final static String ComponentContextTR = "org.osgi.service.component.ComponentContext";
private final static String BundleContextTR = "org.osgi.framework.BundleContext";
private final static String MapTR = Map.class.getName();
private final static String IntTR = int.class.getName();
final static Set<String> allowed = new HashSet<String>(
Arrays.asList(ComponentContextTR, BundleContextTR, MapTR));
final static Set<String> allowedDeactivate = new HashSet<String>(
Arrays.asList(ComponentContextTR, BundleContextTR, MapTR, IntTR));
private final static String ServiceReferenceTR = "org.osgi.framework.ServiceReference";
public HeaderReader(Analyzer analyzer) {
this.analyzer = analyzer;
}
public Tag createComponentTag(String name, String impl, Map<String,String> info) throws Exception {
final ComponentDef cd = new ComponentDef(null, AnnotationReader.V1_0);
cd.name = name;
if (info.get(COMPONENT_ENABLED) != null)
cd.enabled = Boolean.valueOf(info.get(COMPONENT_ENABLED));
cd.factory = info.get(COMPONENT_FACTORY);
if (info.get(COMPONENT_IMMEDIATE) != null)
cd.immediate = Boolean.valueOf(info.get(COMPONENT_IMMEDIATE));
if (info.get(COMPONENT_CONFIGURATION_POLICY) != null)
cd.configurationPolicy = ConfigurationPolicy
.valueOf(info.get(COMPONENT_CONFIGURATION_POLICY).toUpperCase());
cd.activate = checkIdentifier(COMPONENT_ACTIVATE, info.get(COMPONENT_ACTIVATE));
cd.deactivate = checkIdentifier(COMPONENT_DEACTIVATE, info.get(COMPONENT_DEACTIVATE));
cd.modified = checkIdentifier(COMPONENT_MODIFIED, info.get(COMPONENT_MODIFIED));
cd.implementation = analyzer.getTypeRefFromFQN(impl == null ? name : impl);
String provides = info.get(COMPONENT_PROVIDE);
if (info.get(COMPONENT_SERVICEFACTORY) != null) {
if (provides != null)
cd.scope = Boolean.valueOf(info.get(COMPONENT_SERVICEFACTORY)) ? ServiceScope.BUNDLE
: ServiceScope.SINGLETON;
else
warning("The servicefactory:=true directive is set but no service is provided, ignoring it");
}
if (cd.scope == ServiceScope.BUNDLE && cd.immediate != null && cd.immediate) {
// TODO can become error() if it is up to me
warning("For a Service Component, the immediate option and the servicefactory option are mutually exclusive for %s(%s)",
name, impl);
}
// analyze the class for suitable methods.
final Map<String,MethodDef> lifecycleMethods = new HashMap<String,MethodDef>();
final Map<String,MethodDef> bindmethods = new HashMap<String,MethodDef>();
TypeRef typeRef = analyzer.getTypeRefFromFQN(impl);
Clazz clazz = analyzer.findClass(typeRef);
boolean privateAllowed = true;
boolean defaultAllowed = true;
String topPackage = typeRef.getPackageRef().getFQN();
while (clazz != null) {
final boolean pa = privateAllowed;
final boolean da = defaultAllowed;
final Map<String,MethodDef> classLifecyclemethods = new HashMap<String,MethodDef>();
final Map<String,MethodDef> classBindmethods = new HashMap<String,MethodDef>();
clazz.parseClassFileWithCollector(new ClassDataCollector() {
@Override
public void method(MethodDef md) {
Set<String> allowedParams = allowed;
String lifecycleName = null;
boolean isLifecycle = (cd.activate == null ? "activate" : cd.activate).equals(md.getName())
|| md.getName().equals(cd.modified);
if (!isLifecycle && (cd.deactivate == null ? "deactivate" : cd.deactivate).equals(md.getName())) {
isLifecycle = true;
allowedParams = allowedDeactivate;
}
if (isLifecycle && !lifecycleMethods.containsKey(md.getName())
&& (md.isPublic() || md.isProtected() || (md.isPrivate() && pa) || (!md.isPrivate()) && da)
&& isBetter(md, classLifecyclemethods.get(md.getName()), allowedParams)) {
classLifecyclemethods.put(md.getName(), md);
}
if (!bindmethods.containsKey(md.getName())
&& (md.isPublic() || md.isProtected() || (md.isPrivate() && pa) || (!md.isPrivate()) && da)
&& isBetterBind(md, classBindmethods.get(md.getName()))) {
classBindmethods.put(md.getName(), md);
}
}
private boolean isBetter(MethodDef test, MethodDef existing, Set<String> allowedParams) {
int testRating = rateLifecycle(test, allowedParams);
if (existing == null)
return testRating < 6;// ignore invalid methods
if (testRating < rateLifecycle(existing, allowedParams))
return true;
return false;
}
private boolean isBetterBind(MethodDef test, MethodDef existing) {
int testRating = rateBind(test);
if (existing == null)
return testRating < 6;// ignore invalid methods
if (testRating < rateBind(existing))
return true;
return false;
}
});
lifecycleMethods.putAll(classLifecyclemethods);
bindmethods.putAll(classBindmethods);
typeRef = clazz.getSuper();
if (typeRef == null)
break;
clazz = analyzer.findClass(typeRef);
privateAllowed = false;
defaultAllowed = defaultAllowed && topPackage.equals(typeRef.getPackageRef().getFQN());
}
if (cd.activate != null && !lifecycleMethods.containsKey(cd.activate)) {
error("in component %s, activate method %s specified but not found", cd.implementation.getFQN(),
cd.activate);
cd.activate = null;
}
if (cd.deactivate != null && !lifecycleMethods.containsKey(cd.deactivate)) {
error("in component %s, deactivate method %s specified but not found", cd.implementation.getFQN(),
cd.deactivate);
cd.activate = null;
}
if (cd.modified != null && !lifecycleMethods.containsKey(cd.modified)) {
error("in component %s, modified method %s specified but not found", cd.implementation.getFQN(),
cd.modified);
cd.activate = null;
}
provide(cd, provides, impl);
properties(cd, info, name);
reference(info, impl, cd, bindmethods);
// compute namespace after references, an updated method means ds 1.2.
getNamespace(info, cd, lifecycleMethods);
cd.prepare(analyzer);
return cd.getTag();
}
private String checkIdentifier(String name, String value) {
if (value != null) {
if (!Verifier.isIdentifier(value)) {
error("Component attribute %s has value %s but is not a Java identifier", name, value);
return null;
}
}
return value;
}
/**
* Check if we need to use the v1.1 namespace (or later).
*
* @param info
* @param cd TODO
* @param descriptors TODO
*/
private void getNamespace(Map<String,String> info, ComponentDef cd, Map<String,MethodDef> descriptors) {
String namespace = info.get(COMPONENT_NAMESPACE);
if (namespace != null) {
cd.xmlns = namespace;
}
String version = info.get(COMPONENT_VERSION);
if (version != null) {
try {
Version v = new Version(version);
cd.updateVersion(v);
} catch (Exception e) {
error("version: specified on component header but not a valid version: %s", version);
return;
}
}
for (String key : info.keySet()) {
if (SET_COMPONENT_DIRECTIVES_1_2.contains(key)) {
cd.updateVersion(AnnotationReader.V1_2);
return;
}
}
for (ReferenceDef rd : cd.references.values()) {
if (rd.updated != null) {
cd.updateVersion(AnnotationReader.V1_2);
return;
}
}
// among other things this picks up any specified lifecycle methods
for (String key : info.keySet()) {
if (SET_COMPONENT_DIRECTIVES_1_1.contains(key)) {
cd.updateVersion(AnnotationReader.V1_1);
return;
}
}
for (String lifecycle : LIFECYCLE_METHODS) {
// lifecycle methods were not specified.... check for non 1.0
// signatures.
MethodDef test = descriptors.get(lifecycle);
if (descriptors.containsKey(lifecycle) && (!(test.isPublic() || test.isProtected())
|| rateLifecycle(test, "deactivate".equals(lifecycle) ? allowedDeactivate : allowed) > 1)) {
cd.updateVersion(AnnotationReader.V1_1);
return;
}
}
}
/**
* Print the Service-Component properties element
*
* @param cd
* @param info
*/
void properties(ComponentDef cd, Map<String,String> info, String name) {
Collection<String> properties = split(info.get(COMPONENT_PROPERTIES));
for (String p : properties) {
Matcher m = PROPERTY_PATTERN.matcher(p);
if (m.matches()) {
String key = m.group(2);
String type = m.group(4);
if (type == null)
type = "String"; // default
String value = m.group(5);
String parts[] = value.split("\\s*(\\||\\n)\\s*");
if (parts.length == 1 && value.endsWith("|")) {
String v = parts[0];
parts = new String[2];
parts[0] = v;
parts[1] = ComponentDef.MARKER;
}
cd.propertyType.put(key, type);
for (String part : parts) {
cd.property.add(key, part);
}
} else
throw new IllegalArgumentException("Malformed property '" + p + "' on component: " + name);
}
}
/**
* @param cd
* @param provides
*/
void provide(ComponentDef cd, String provides, String impl) {
if (provides != null) {
StringTokenizer st = new StringTokenizer(provides, ",");
List<TypeRef> provide = new ArrayList<TypeRef>();
while (st.hasMoreTokens()) {
String interfaceName = st.nextToken();
TypeRef ref = analyzer.getTypeRefFromFQN(interfaceName);
provide.add(ref);
analyzer.referTo(ref);
// TODO verifies the impl. class extends or implements the
// interface
}
cd.service = provide.toArray(new TypeRef[0]);
}
}
public final static Pattern REFERENCE = Pattern.compile("([^(]+)(\\(.+\\))?");
/**
* rates the methods according to the scale in 112.5.8 (compendium 4.3, ds
* 1.2), also returning "6" for invalid methods We don't look at return
* values yet due to proposal to all them for setting service properties.
*
* @param test methodDef to examine for suitability as a DS lifecycle method
* @param allowedParams TODO
* @return rating; 6 if invalid, lower is better
*/
int rateLifecycle(MethodDef test, Set<String> allowedParams) {
TypeRef[] prototype = test.getDescriptor().getPrototype();
if (prototype.length == 1 && ComponentContextTR.equals(prototype[0].getFQN()))
return 1;
if (prototype.length == 1 && BundleContextTR.equals(prototype[0].getFQN()))
return 2;
if (prototype.length == 1 && MapTR.equals(prototype[0].getFQN()))
return 3;
if (prototype.length > 1) {
for (TypeRef tr : prototype) {
if (!allowedParams.contains(tr.getFQN()))
return 6;
}
return 5;
}
if (prototype.length == 0)
return 5;
return 6;
}
/**
* see 112.3.2. We can't distinguish the bind type, so we just accept
* anything.
*
* @param test
*/
int rateBind(MethodDef test) {
TypeRef[] prototype = test.getDescriptor().getPrototype();
if (prototype.length == 1 && ServiceReferenceTR.equals(prototype[0].getFQN()))
return 1;
if (prototype.length == 1)
return 2;
if (prototype.length == 2 && MapTR.equals(prototype[1].getFQN()))
return 3;
return 6;
}
/**
* @param info
* @param impl TODO
* @param descriptors TODO
* @param pw
* @throws Exception
*/
void reference(Map<String,String> info, String impl, ComponentDef cd, Map<String,MethodDef> descriptors)
throws Exception {
Collection<String> dynamic = new ArrayList<String>(split(info.get(COMPONENT_DYNAMIC)));
Collection<String> optional = new ArrayList<String>(split(info.get(COMPONENT_OPTIONAL)));
Collection<String> multiple = new ArrayList<String>(split(info.get(COMPONENT_MULTIPLE)));
Collection<String> greedy = new ArrayList<String>(split(info.get(COMPONENT_GREEDY)));
for (Map.Entry<String,String> entry : info.entrySet()) {
// Skip directives
String referenceName = entry.getKey();
if (referenceName.endsWith(":")) {
if (!SET_COMPONENT_DIRECTIVES.contains(referenceName))
error("Unrecognized directive in " + Constants.SERVICE_COMPONENT + " header: %s", referenceName);
continue;
}
// Parse the bind/unbind methods from the name
// if set. They are separated by '/'
String bind = null;
String unbind = null;
String updated = null;
boolean bindCalculated = true;
boolean unbindCalculated = true;
boolean updatedCalculated = true;
if (referenceName.indexOf('/') >= 0) {
String parts[] = referenceName.split("/");
referenceName = parts[0];
if (parts[1].length() > 0) {
bind = parts[1];
bindCalculated = false;
} else {
bind = calculateBind(referenceName);
}
bind = parts[1].length() == 0 ? calculateBind(referenceName) : parts[1];
if (parts.length > 2 && parts[2].length() > 0) {
unbind = parts[2];
unbindCalculated = false;
} else {
if (bind.startsWith("add"))
unbind = bind.replaceAll("add(.+)", "remove$1");
else
unbind = "un" + bind;
}
if (parts.length > 3) {
updated = parts[3];
updatedCalculated = false;
}
} else if (Character.isLowerCase(referenceName.charAt(0))) {
bind = calculateBind(referenceName);
unbind = "un" + bind;
updated = "updated" + Character.toUpperCase(referenceName.charAt(0)) + referenceName.substring(1);
}
String interfaceName = entry.getValue();
if (interfaceName == null || interfaceName.length() == 0) {
error("Invalid Interface Name for references in Service Component: %s=%s", referenceName,
interfaceName);
continue;
}
// If we have descriptors, we have analyzed the component.
// So why not check the methods
if (descriptors.size() > 0) {
// Verify that the bind method exists
if (!descriptors.containsKey(bind))
if (bindCalculated)
bind = null;
else
error("In component %s, the bind method %s for %s not defined", cd.effectiveName(), bind,
referenceName);
// Check if the unbind method exists
if (!descriptors.containsKey(unbind)) {
if (unbindCalculated)
// remove it
unbind = null;
else
error("In component %s, the unbind method %s for %s not defined", cd.effectiveName(), unbind,
referenceName);
}
if (!descriptors.containsKey(updated)) {
if (updatedCalculated)
// remove it
updated = null;
else
error("In component %s, the updated method %s for %s is not defined", cd.effectiveName(),
updated, referenceName);
}
}
// Check the cardinality by looking at the last
// character of the value
char c = interfaceName.charAt(interfaceName.length() - 1);
if ("?+*~".indexOf(c) >= 0) {
if (c == '?' || c == '*' || c == '~')
optional.add(referenceName);
if (c == '+' || c == '*')
multiple.add(referenceName);
if (c == '+' || c == '*' || c == '?')
dynamic.add(referenceName);
interfaceName = interfaceName.substring(0, interfaceName.length() - 1);
}
// Parse the target from the interface name
// The target is a filter.
String target = null;
Matcher m = REFERENCE.matcher(interfaceName);
if (m.matches()) {
interfaceName = m.group(1);
target = m.group(2);
}
TypeRef ref = analyzer.getTypeRefFromFQN(interfaceName);
analyzer.referTo(ref);
ReferenceDef rd = new ReferenceDef(null);
rd.name = referenceName;
rd.service = interfaceName;
if (optional.contains(referenceName)) {
if (multiple.contains(referenceName)) {
rd.cardinality = ReferenceCardinality.MULTIPLE;
} else {
rd.cardinality = ReferenceCardinality.OPTIONAL;
}
} else {
if (multiple.contains(referenceName)) {
rd.cardinality = ReferenceCardinality.AT_LEAST_ONE;
} else {
rd.cardinality = ReferenceCardinality.MANDATORY;
}
}
if (bind != null) {
rd.bind = bind;
if (unbind != null) {
rd.unbind = unbind;
}
if (updated != null) {
rd.updated = updated;
}
}
if (dynamic.contains(referenceName)) {
rd.policy = ReferencePolicy.DYNAMIC;
if (rd.unbind == null)
error("In component %s, reference %s is dynamic but has no unbind method.",
cd.effectiveName(), rd.name)
.details(new DeclarativeServicesAnnotationError(cd.implementation.getFQN(), null,
null, ErrorType.DYNAMIC_REFERENCE_WITHOUT_UNBIND));
}
if (greedy.contains(referenceName)) {
rd.policyOption = ReferencePolicyOption.GREEDY;
}
if (target != null) {
rd.target = target;
}
cd.references.put(referenceName, rd);
}
}
private String calculateBind(String referenceName) {
return "set" + Character.toUpperCase(referenceName.charAt(0)) + referenceName.substring(1);
}
}