Remove yang-test
[controller.git] / opendaylight / config / config-manager-facade-xml / src / main / java / org / opendaylight / controller / config / facade / xml / mapping / attributes / toxml / SimpleUnionAttributeWritingStrategy.java
1 /*
2  * Copyright (c) 2015, 2017 Cisco Systems, Inc. and others.  All rights reserved.
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6  * and is available at http://www.eclipse.org/legal/epl-v10.html
7  */
8
9 package org.opendaylight.controller.config.facade.xml.mapping.attributes.toxml;
10
11 import com.google.common.base.Preconditions;
12 import java.util.List;
13 import java.util.Map;
14 import org.opendaylight.controller.config.facade.xml.util.Util;
15 import org.w3c.dom.Document;
16
17 public class SimpleUnionAttributeWritingStrategy extends SimpleAttributeWritingStrategy {
18
19     public SimpleUnionAttributeWritingStrategy(final Document document, final String key) {
20         super(document, key);
21     }
22
23     @Override
24     protected Object preprocess(final Object value) {
25         Util.checkType(value, Map.class);
26         Preconditions.checkArgument(((Map<?, ?>) value).size() == 1, "Unexpected number of values in %s, expected 1",
27                 value);
28         Object listOfStrings = ((Map<?, ?>) value).values().iterator().next();
29         Util.checkType(listOfStrings, List.class);
30
31         StringBuilder builder = new StringBuilder();
32         for (Object character : (List<?>) listOfStrings) {
33             Util.checkType(character, String.class);
34             builder.append(character);
35         }
36         return builder.toString();
37     }
38 }

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