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java/org/apache/naming/NamingContextBindingsEnumeration.java

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+/*
+ * 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.naming;
+
+import java.util.Iterator;
+
+import javax.naming.Binding;
+import javax.naming.CompositeName;
+import javax.naming.Context;
+import javax.naming.NamingEnumeration;
+import javax.naming.NamingException;
+
+/**
+ * Naming enumeration implementation.
+ *
+ * @author Remy Maucherat
+ */
+public class NamingContextBindingsEnumeration
+    implements NamingEnumeration<Binding> {
+
+
+    // ----------------------------------------------------------- Constructors
+
+
+    public NamingContextBindingsEnumeration(Iterator<NamingEntry> entries,
+            Context ctx) {
+        iterator = entries;
+        this.ctx = ctx;
+    }
+
+    // -------------------------------------------------------------- Variables
+
+
+    /**
+     * Underlying enumeration.
+     */
+    protected final Iterator<NamingEntry> iterator;
+
+
+    /**
+     * The context for which this enumeration is being generated.
+     */
+    private final Context ctx;
+
+
+    // --------------------------------------------------------- Public Methods
+
+
+    /**
+     * Retrieves the next element in the enumeration.
+     */
+    @Override
+    public Binding next()
+        throws NamingException {
+        return nextElementInternal();
+    }
+
+
+    /**
+     * Determines whether there are any more elements in the enumeration.
+     */
+    @Override
+    public boolean hasMore()
+        throws NamingException {
+        return iterator.hasNext();
+    }
+
+
+    /**
+     * Closes this enumeration.
+     */
+    @Override
+    public void close()
+        throws NamingException {
+    }
+
+
+    @Override
+    public boolean hasMoreElements() {
+        return iterator.hasNext();
+    }
+
+
+    @Override
+    public Binding nextElement() {
+        try {
+            return nextElementInternal();
+        } catch (NamingException e) {
+            throw new RuntimeException(e.getMessage(), e);
+        }
+    }
+
+    private Binding nextElementInternal() throws NamingException {
+        NamingEntry entry = iterator.next();
+        Object value;
+
+        // If the entry is a reference, resolve it
+        if (entry.type == NamingEntry.REFERENCE
+                || entry.type == NamingEntry.LINK_REF) {
+            try {
+                value = ctx.lookup(new CompositeName(entry.name));
+            } catch (NamingException e) {
+                throw e;
+            } catch (Exception e) {
+                NamingException ne = new NamingException(e.getMessage());
+                ne.initCause(e);
+                throw ne;
+            }
+        } else {
+            value = entry.value;
+        }
+
+        return new Binding(entry.name, value.getClass().getName(), value, true);
+    }
+}
+