1 /** 2 * Copyright (c) 2008, http://www.snakeyaml.org 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.yaml.snakeyaml.partialconstruct; 17 18 import org.yaml.snakeyaml.composer.Composer; 19 import org.yaml.snakeyaml.nodes.MappingNode; 20 import org.yaml.snakeyaml.nodes.Node; 21 import org.yaml.snakeyaml.nodes.NodeTuple; 22 import org.yaml.snakeyaml.nodes.ScalarNode; 23 import org.yaml.snakeyaml.parser.Parser; 24 import org.yaml.snakeyaml.resolver.Resolver; 25 26 class FragmentComposer extends Composer { 27 String nodeName; 28 29 public FragmentComposer(Parser parser, Resolver resolver, String nodeName) { 30 super(parser, resolver); 31 this.nodeName = nodeName; 32 } 33 34 @Override 35 public Node getSingleNode() { 36 Node node = super.getSingleNode(); 37 if (!MappingNode.class.isAssignableFrom(node.getClass())) { 38 throw new RuntimeException( 39 "Document is not structured as expected. Root element should be a map!"); 40 } 41 MappingNode root = (MappingNode) node; 42 for (NodeTuple tuple : root.getValue()) { 43 Node keyNode = tuple.getKeyNode(); 44 if (ScalarNode.class.isAssignableFrom(keyNode.getClass())) { 45 if (((ScalarNode) keyNode).getValue().equals(nodeName)) { 46 return tuple.getValueNode(); 47 } 48 } 49 } 50 throw new RuntimeException("Did not find key \"" + nodeName + "\" in document-level map"); 51 } 52 }
