1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.model.interpolation;
20
21 import java.util.List;
22
23 import org.codehaus.plexus.interpolation.AbstractDelegatingValueSource;
24 import org.codehaus.plexus.interpolation.PrefixedValueSourceWrapper;
25 import org.codehaus.plexus.interpolation.QueryEnabledValueSource;
26
27 /**
28 * Wraps an arbitrary object with an {@link ObjectBasedValueSource} instance, then
29 * wraps that source with a {@link PrefixedValueSourceWrapper} instance, to which
30 * this class delegates all of its calls.
31 */
32 public class PrefixedObjectValueSource extends AbstractDelegatingValueSource implements QueryEnabledValueSource {
33
34 /**
35 * Wrap the specified root object, allowing the specified expression prefix.
36 * @param prefix the prefix.
37 * @param root the root of the graph.
38 */
39 public PrefixedObjectValueSource(String prefix, Object root) {
40 super(new PrefixedValueSourceWrapper(new ObjectBasedValueSource(root), prefix));
41 }
42
43 /**
44 * Wrap the specified root object, allowing the specified list of expression
45 * prefixes and setting whether the {@link PrefixedValueSourceWrapper} allows
46 * unprefixed expressions.
47 * @param possiblePrefixes The possible prefixes.
48 * @param root The root of the graph.
49 * @param allowUnprefixedExpressions if we allow undefined expressions or not.
50 */
51 public PrefixedObjectValueSource(List<String> possiblePrefixes, Object root, boolean allowUnprefixedExpressions) {
52 super(new PrefixedValueSourceWrapper(
53 new ObjectBasedValueSource(root), possiblePrefixes, allowUnprefixedExpressions));
54 }
55
56 /**
57 * {@inheritDoc}
58 */
59 public String getLastExpression() {
60 return ((QueryEnabledValueSource) getDelegate()).getLastExpression();
61 }
62 }