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package org.apache.camel.util.jndi; |
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import java.io.Serializable; |
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import java.util.HashMap; |
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import java.util.Hashtable; |
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import java.util.Iterator; |
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import java.util.Map; |
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import javax.naming.Binding; |
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import javax.naming.CompositeName; |
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import javax.naming.Context; |
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import javax.naming.LinkRef; |
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import javax.naming.Name; |
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import javax.naming.NameClassPair; |
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import javax.naming.NameNotFoundException; |
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import javax.naming.NameParser; |
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import javax.naming.NamingEnumeration; |
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import javax.naming.NamingException; |
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import javax.naming.NotContextException; |
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import javax.naming.OperationNotSupportedException; |
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import javax.naming.Reference; |
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import javax.naming.spi.NamingManager; |
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import org.apache.camel.impl.ReflectionInjector; |
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import org.apache.camel.spi.Injector; |
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import org.apache.camel.util.IntrospectionSupport; |
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import org.apache.camel.util.ObjectHelper; |
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public class JndiContext implements Context, Serializable { |
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public static final String SEPARATOR = "/"; |
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protected static final NameParser NAME_PARSER = new NameParser() { |
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public Name parse(String name) throws NamingException { |
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return new CompositeName(name); |
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} |
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}; |
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protected static final Injector INJETOR = new ReflectionInjector(); |
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private static final long serialVersionUID = -5754338187296859149L; |
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private final Hashtable environment; |
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private final Map bindings; |
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private final Map treeBindings; |
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private boolean frozen; |
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private String nameInNamespace = ""; |
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public JndiContext() { |
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this(new Hashtable()); |
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} |
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public JndiContext(Hashtable env) { |
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this(env, createBindingsMapFromEnvironment(env)); |
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} |
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public JndiContext(Hashtable environment, Map bindings) { |
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if (environment == null) { |
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this.environment = new Hashtable(); |
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} else { |
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this.environment = new Hashtable(environment); |
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} |
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this.bindings = bindings; |
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treeBindings = new HashMap(); |
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} |
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public JndiContext(Hashtable environment, Map bindings, String nameInNamespace) { |
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this(environment, bindings); |
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this.nameInNamespace = nameInNamespace; |
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} |
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protected JndiContext(JndiContext clone, Hashtable env) { |
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this.bindings = clone.bindings; |
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this.treeBindings = clone.treeBindings; |
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this.environment = new Hashtable(env); |
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} |
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protected JndiContext(JndiContext clone, Hashtable env, String nameInNamespace) { |
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this(clone, env); |
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this.nameInNamespace = nameInNamespace; |
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} |
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public static Map createBindingsMapFromEnvironment(Hashtable env) { |
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Map answer = new HashMap(env); |
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for (Object object : env.entrySet()) { |
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Map.Entry entry = (Map.Entry)object; |
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Object key = entry.getKey(); |
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Object value = entry.getValue(); |
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if (key instanceof String && value instanceof String) { |
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String keyText = (String)key; |
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String valueText = (String)value; |
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if (keyText.endsWith(".class")) { |
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Class<?> type = ObjectHelper.loadClass(valueText); |
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if (type != null) { |
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String newEntry = keyText.substring(0, keyText.length() - ".class".length()); |
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Object bean = createBean(type, answer, newEntry + "."); |
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if (bean != null) { |
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answer.put(newEntry, bean); |
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} |
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} |
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} |
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} |
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} |
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return answer; |
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} |
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public void freeze() { |
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frozen = true; |
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} |
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boolean isFrozen() { |
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return frozen; |
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} |
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protected Map internalBind(String name, Object value) throws NamingException { |
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assert name != null && name.length() > 0; |
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assert !frozen; |
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Map newBindings = new HashMap(); |
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int pos = name.indexOf('/'); |
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if (pos == -1) { |
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if (treeBindings.put(name, value) != null) { |
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throw new NamingException("Something already bound at " + name); |
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} |
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bindings.put(name, value); |
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newBindings.put(name, value); |
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} else { |
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String segment = name.substring(0, pos); |
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assert segment != null; |
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assert !segment.equals(""); |
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Object o = treeBindings.get(segment); |
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if (o == null) { |
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o = newContext(); |
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treeBindings.put(segment, o); |
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bindings.put(segment, o); |
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newBindings.put(segment, o); |
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} else if (!(o instanceof JndiContext)) { |
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throw new NamingException("Something already bound where a subcontext should go"); |
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} |
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JndiContext defaultContext = (JndiContext)o; |
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String remainder = name.substring(pos + 1); |
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Map subBindings = defaultContext.internalBind(remainder, value); |
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for (Iterator iterator = subBindings.entrySet().iterator(); iterator.hasNext();) { |
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Map.Entry entry = (Map.Entry)iterator.next(); |
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String subName = segment + "/" + (String)entry.getKey(); |
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Object bound = entry.getValue(); |
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treeBindings.put(subName, bound); |
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newBindings.put(subName, bound); |
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} |
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} |
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return newBindings; |
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} |
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protected JndiContext newContext() { |
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return new JndiContext(); |
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} |
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public Object addToEnvironment(String propName, Object propVal) throws NamingException { |
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return environment.put(propName, propVal); |
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} |
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public Hashtable getEnvironment() throws NamingException { |
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return (Hashtable)environment.clone(); |
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} |
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public Object removeFromEnvironment(String propName) throws NamingException { |
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return environment.remove(propName); |
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} |
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public Object lookup(String name) throws NamingException { |
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if (name.length() == 0) { |
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return this; |
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} |
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Object result = treeBindings.get(name); |
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if (result == null) { |
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result = bindings.get(name); |
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} |
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if (result == null) { |
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int pos = name.indexOf(':'); |
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if (pos > 0) { |
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String scheme = name.substring(0, pos); |
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Context ctx = NamingManager.getURLContext(scheme, environment); |
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if (ctx == null) { |
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throw new NamingException("scheme " + scheme + " not recognized"); |
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} |
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return ctx.lookup(name); |
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} else { |
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CompositeName path = new CompositeName(name); |
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if (path.size() == 0) { |
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return this; |
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} else { |
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String first = path.get(0); |
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Object value = bindings.get(first); |
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if (value == null) { |
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throw new NameNotFoundException(name); |
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} else if (value instanceof Context && path.size() > 1) { |
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Context subContext = (Context)value; |
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value = subContext.lookup(path.getSuffix(1)); |
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} |
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return value; |
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} |
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} |
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} |
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if (result instanceof LinkRef) { |
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LinkRef ref = (LinkRef)result; |
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result = lookup(ref.getLinkName()); |
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} |
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if (result instanceof Reference) { |
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try { |
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result = NamingManager.getObjectInstance(result, null, null, this.environment); |
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} catch (NamingException e) { |
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throw e; |
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} catch (Exception e) { |
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throw (NamingException)new NamingException("could not look up : " + name).initCause(e); |
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} |
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} |
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if (result instanceof JndiContext) { |
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String prefix = getNameInNamespace(); |
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if (prefix.length() > 0) { |
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prefix = prefix + SEPARATOR; |
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} |
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result = new JndiContext((JndiContext)result, environment, prefix + name); |
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} |
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return result; |
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} |
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public Object lookup(Name name) throws NamingException { |
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return lookup(name.toString()); |
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} |
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public Object lookupLink(String name) throws NamingException { |
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return lookup(name); |
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} |
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public Name composeName(Name name, Name prefix) throws NamingException { |
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Name result = (Name)prefix.clone(); |
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result.addAll(name); |
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return result; |
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} |
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public String composeName(String name, String prefix) throws NamingException { |
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CompositeName result = new CompositeName(prefix); |
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result.addAll(new CompositeName(name)); |
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return result.toString(); |
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} |
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public NamingEnumeration list(String name) throws NamingException { |
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Object o = lookup(name); |
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if (o == this) { |
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return new ListEnumeration(); |
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} else if (o instanceof Context) { |
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return ((Context)o).list(""); |
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} else { |
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throw new NotContextException(); |
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} |
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} |
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public NamingEnumeration listBindings(String name) throws NamingException { |
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Object o = lookup(name); |
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if (o == this) { |
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return new ListBindingEnumeration(); |
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} else if (o instanceof Context) { |
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return ((Context)o).listBindings(""); |
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} else { |
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throw new NotContextException(); |
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} |
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} |
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public Object lookupLink(Name name) throws NamingException { |
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return lookupLink(name.toString()); |
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} |
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public NamingEnumeration list(Name name) throws NamingException { |
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return list(name.toString()); |
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} |
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public NamingEnumeration listBindings(Name name) throws NamingException { |
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return listBindings(name.toString()); |
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} |
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public void bind(Name name, Object value) throws NamingException { |
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bind(name.toString(), value); |
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} |
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public void bind(String name, Object value) throws NamingException { |
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if (isFrozen()) { |
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throw new OperationNotSupportedException(); |
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} else { |
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internalBind(name, value); |
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} |
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} |
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public void close() throws NamingException { |
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} |
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public Context createSubcontext(Name name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public Context createSubcontext(String name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public void destroySubcontext(Name name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public void destroySubcontext(String name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public String getNameInNamespace() throws NamingException { |
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return nameInNamespace; |
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} |
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public NameParser getNameParser(Name name) throws NamingException { |
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return NAME_PARSER; |
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} |
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public NameParser getNameParser(String name) throws NamingException { |
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return NAME_PARSER; |
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} |
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public void rebind(Name name, Object value) throws NamingException { |
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bind(name, value); |
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} |
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public void rebind(String name, Object value) throws NamingException { |
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bind(name, value); |
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} |
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public void rename(Name oldName, Name newName) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public void rename(String oldName, String newName) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public void unbind(Name name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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public void unbind(String name) throws NamingException { |
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throw new OperationNotSupportedException(); |
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} |
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private abstract class LocalNamingEnumeration implements NamingEnumeration { |
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private Iterator i = bindings.entrySet().iterator(); |
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public boolean hasMore() throws NamingException { |
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return i.hasNext(); |
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} |
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public boolean hasMoreElements() { |
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return i.hasNext(); |
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} |
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protected Map.Entry getNext() { |
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return (Map.Entry)i.next(); |
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} |
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public void close() throws NamingException { |
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} |
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} |
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private class ListEnumeration extends LocalNamingEnumeration { |
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ListEnumeration() { |
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} |
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public Object next() throws NamingException { |
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return nextElement(); |
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} |
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public Object nextElement() { |
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Map.Entry entry = getNext(); |
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return new NameClassPair((String)entry.getKey(), entry.getValue().getClass().getName()); |
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} |
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} |
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private class ListBindingEnumeration extends LocalNamingEnumeration { |
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ListBindingEnumeration() { |
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} |
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public Object next() throws NamingException { |
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return nextElement(); |
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} |
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public Object nextElement() { |
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Map.Entry entry = getNext(); |
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return new Binding((String)entry.getKey(), entry.getValue()); |
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} |
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} |
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protected static Object createBean(Class<?> type, Map properties, String prefix) { |
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Object value = INJETOR.newInstance(type); |
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IntrospectionSupport.setProperties(value, properties, prefix); |
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return value; |
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} |
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} |