/jboss-as-7.1.1.Final/controller/src/main/java/org/jboss/as/controller/ExpressionResolverImpl.java

 1/*
 2* JBoss, Home of Professional Open Source.
 3* Copyright 2011, Red Hat Middleware LLC, and individual contributors
 4* as indicated by the @author tags. See the copyright.txt file in the
 5* distribution for a full listing of individual contributors.
 6*
 7* This is free software; you can redistribute it and/or modify it
 8* under the terms of the GNU Lesser General Public License as
 9* published by the Free Software Foundation; either version 2.1 of
10* the License, or (at your option) any later version.
11*
12* This software is distributed in the hope that it will be useful,
13* but WITHOUT ANY WARRANTY; without even the implied warranty of
14* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15* Lesser General Public License for more details.
16*
17* You should have received a copy of the GNU Lesser General Public
18* License along with this software; if not, write to the Free
19* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21*/
22package org.jboss.as.controller;
23
24import org.jboss.dmr.ModelNode;
25import org.jboss.dmr.ModelType;
26import org.jboss.dmr.Property;
27
28/**
29 * Basic {@link ExpressionResolver} implementation.
30 *
31 * @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
32 */
33public class ExpressionResolverImpl implements ExpressionResolver {
34
35    protected ExpressionResolverImpl() {
36    }
37
38    @Override
39    public final ModelNode resolveExpressions(final ModelNode node) throws OperationFailedException {
40        ModelNode resolved = resolveExpressionsRecursively(node);
41        try {
42            return resolved.resolve();
43        } catch (SecurityException e) {
44            throw new OperationFailedException(new ModelNode().set(ControllerMessages.MESSAGES.noPermissionToResolveExpression(resolved, e)));
45        } catch (IllegalStateException e) {
46            throw new OperationFailedException(new ModelNode().set(ControllerMessages.MESSAGES.cannotResolveExpression(resolved, e)));
47        }
48    }
49
50    private ModelNode resolveExpressionsRecursively(final ModelNode node) {
51        if (!node.isDefined()) {
52            return node;
53        }
54
55        ModelNode resolved;
56        if (node.getType() == ModelType.EXPRESSION) {
57            resolved = node.clone();
58            resolvePluggableExpression(resolved);
59        } else if (node.getType() == ModelType.OBJECT) {
60            resolved = node.clone();
61            for (Property prop : resolved.asPropertyList()) {
62                resolved.get(prop.getName()).set(resolveExpressionsRecursively(prop.getValue()));
63            }
64        } else if (node.getType() == ModelType.LIST) {
65            resolved = node.clone();
66            ModelNode list = new ModelNode();
67            for (ModelNode current : resolved.asList()) {
68                list.add(resolveExpressionsRecursively(current));
69            }
70            resolved = list;
71        } else if (node.getType() == ModelType.PROPERTY) {
72            resolved = node.clone();
73            resolved.set(resolved.asProperty().getName(), resolveExpressionsRecursively(resolved.asProperty().getValue()));
74        } else {
75            resolved = node;
76        }
77
78        return resolved;
79    }
80
81    protected void resolvePluggableExpression(ModelNode node) {
82    }
83
84}