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package org.yaml.snakeyaml.composer; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import org.yaml.snakeyaml.events.AliasEvent; |
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import org.yaml.snakeyaml.events.Event; |
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import org.yaml.snakeyaml.events.MappingStartEvent; |
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import org.yaml.snakeyaml.events.NodeEvent; |
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import org.yaml.snakeyaml.events.ScalarEvent; |
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import org.yaml.snakeyaml.events.SequenceStartEvent; |
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import org.yaml.snakeyaml.nodes.MappingNode; |
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import org.yaml.snakeyaml.nodes.Node; |
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import org.yaml.snakeyaml.nodes.NodeId; |
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import org.yaml.snakeyaml.nodes.NodeTuple; |
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import org.yaml.snakeyaml.nodes.ScalarNode; |
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import org.yaml.snakeyaml.nodes.SequenceNode; |
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import org.yaml.snakeyaml.nodes.Tag; |
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import org.yaml.snakeyaml.parser.Parser; |
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import org.yaml.snakeyaml.resolver.Resolver; |
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public class Composer { |
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private final Parser parser; |
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private final Resolver resolver; |
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private final Map<String, Node> anchors; |
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private final Set<Node> recursiveNodes; |
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55 | 1103 | public Composer(Parser parser, Resolver resolver) { |
56 | 1103 | this.parser = parser; |
57 | 1103 | this.resolver = resolver; |
58 | 1103 | this.anchors = new HashMap<String, Node>(); |
59 | 1103 | this.recursiveNodes = new HashSet<Node>(); |
60 | 1103 | } |
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public boolean checkNode() { |
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69 | 1155 | if (parser.checkEvent(Event.ID.StreamStart)) { |
70 | 530 | parser.getEvent(); |
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} |
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73 | 1151 | return !parser.checkEvent(Event.ID.StreamEnd); |
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} |
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public Node getNode() { |
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84 | 572 | if (!parser.checkEvent(Event.ID.StreamEnd)) { |
85 | 572 | return composeDocument(); |
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} else { |
87 | 0 | return null; |
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} |
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} |
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public Node getSingleNode() { |
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102 | 572 | parser.getEvent(); |
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104 | 572 | Node document = null; |
105 | 572 | if (!parser.checkEvent(Event.ID.StreamEnd)) { |
106 | 564 | document = composeDocument(); |
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} |
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109 | 566 | if (!parser.checkEvent(Event.ID.StreamEnd)) { |
110 | 5 | Event event = parser.getEvent(); |
111 | 5 | throw new ComposerException("expected a single document in the stream", |
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document.getStartMark(), "but found another document", event.getStartMark()); |
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} |
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115 | 561 | parser.getEvent(); |
116 | 561 | return document; |
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} |
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private Node composeDocument() { |
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121 | 1136 | parser.getEvent(); |
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123 | 1136 | Node node = composeNode(null, null); |
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125 | 1069 | parser.getEvent(); |
126 | 1069 | this.anchors.clear(); |
127 | 1069 | recursiveNodes.clear(); |
128 | 1069 | return node; |
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} |
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private Node composeNode(Node parent, Object index) { |
132 | 387926 | recursiveNodes.add(parent); |
133 | 387926 | if (parser.checkEvent(Event.ID.Alias)) { |
134 | 1278 | AliasEvent event = (AliasEvent) parser.getEvent(); |
135 | 1278 | String anchor = event.getAnchor(); |
136 | 1278 | if (!anchors.containsKey(anchor)) { |
137 | 2 | throw new ComposerException(null, null, "found undefined alias " + anchor, |
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event.getStartMark()); |
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} |
140 | 1276 | Node result = anchors.get(anchor); |
141 | 1276 | if (recursiveNodes.remove(result)) { |
142 | 89 | result.setTwoStepsConstruction(true); |
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} |
144 | 1276 | return result; |
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} |
146 | 386624 | NodeEvent event = (NodeEvent) parser.peekEvent(); |
147 | 386624 | String anchor = null; |
148 | 386624 | anchor = event.getAnchor(); |
149 | 386624 | if (anchor != null && anchors.containsKey(anchor)) { |
150 | 4 | throw new ComposerException("found duplicate anchor " + anchor + "; first occurence", |
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this.anchors.get(anchor).getStartMark(), "second occurence", |
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event.getStartMark()); |
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} |
154 | 386620 | Node node = null; |
155 | 386620 | if (parser.checkEvent(Event.ID.Scalar)) { |
156 | 352552 | node = composeScalarNode(anchor); |
157 | 34068 | } else if (parser.checkEvent(Event.ID.SequenceStart)) { |
158 | 10900 | node = composeSequenceNode(anchor); |
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} else { |
160 | 23168 | node = composeMappingNode(anchor); |
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} |
162 | 386564 | recursiveNodes.remove(parent); |
163 | 386564 | return node; |
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} |
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private Node composeScalarNode(String anchor) { |
167 | 352552 | ScalarEvent ev = (ScalarEvent) parser.getEvent(); |
168 | 352552 | String tag = ev.getTag(); |
169 | 352552 | boolean resolved = false; |
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Tag nodeTag; |
171 | 352552 | if (tag == null || tag.equals("!")) { |
172 | 351507 | nodeTag = resolver.resolve(NodeId.scalar, ev.getValue(), ev.getImplicit().canOmitTagInPlainScalar()); |
173 | 351507 | resolved = true; |
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} else { |
175 | 1045 | nodeTag = new Tag(tag); |
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} |
177 | 352552 | Node node = new ScalarNode(nodeTag, resolved, ev.getValue(), ev.getStartMark(), |
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ev.getEndMark(), ev.getStyle()); |
179 | 352552 | if (anchor != null) { |
180 | 35 | anchors.put(anchor, node); |
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} |
182 | 352552 | return node; |
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} |
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private Node composeSequenceNode(String anchor) { |
186 | 10900 | SequenceStartEvent startEvent = (SequenceStartEvent) parser.getEvent(); |
187 | 10900 | String tag = startEvent.getTag(); |
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Tag nodeTag; |
189 | 10900 | boolean resolved = false; |
190 | 10900 | if (tag == null || tag.equals("!")) { |
191 | 10771 | nodeTag = resolver.resolve(NodeId.sequence, null, startEvent.getImplicit()); |
192 | 10771 | resolved = true; |
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} else { |
194 | 129 | nodeTag = new Tag(tag); |
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} |
196 | 10900 | final ArrayList<Node> children = new ArrayList<Node>(); |
197 | 10900 | SequenceNode node = new SequenceNode(nodeTag, resolved, children, |
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startEvent.getStartMark(), null, startEvent.getFlowStyle()); |
199 | 10900 | if (anchor != null) { |
200 | 10 | anchors.put(anchor, node); |
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} |
202 | 10900 | int index = 0; |
203 | 125146 | while (!parser.checkEvent(Event.ID.SequenceEnd)) { |
204 | 114258 | children.add(composeNode(node, index)); |
205 | 114246 | index++; |
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} |
207 | 10867 | Event endEvent = parser.getEvent(); |
208 | 10867 | node.setEndMark(endEvent.getEndMark()); |
209 | 10867 | return node; |
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} |
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private Node composeMappingNode(String anchor) { |
213 | 23168 | MappingStartEvent startEvent = (MappingStartEvent) parser.getEvent(); |
214 | 23168 | String tag = startEvent.getTag(); |
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Tag nodeTag; |
216 | 23168 | boolean resolved = false; |
217 | 23168 | if (tag == null || tag.equals("!")) { |
218 | 21061 | nodeTag = resolver.resolve(NodeId.mapping, null, startEvent.getImplicit()); |
219 | 21061 | resolved = true; |
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} else { |
221 | 2107 | nodeTag = new Tag(tag); |
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} |
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224 | 23168 | final List<NodeTuple> children = new ArrayList<NodeTuple>(); |
225 | 23168 | MappingNode node = new MappingNode(nodeTag, resolved, children, startEvent.getStartMark(), |
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null, startEvent.getFlowStyle()); |
227 | 23168 | if (anchor != null) { |
228 | 1147 | anchors.put(anchor, node); |
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} |
230 | 159427 | while (!parser.checkEvent(Event.ID.MappingEnd)) { |
231 | 136266 | Node itemKey = composeNode(node, null); |
232 | 136266 | if (itemKey.getTag().equals(Tag.MERGE)) { |
233 | 27 | node.setMerged(true); |
234 | 136239 | } else if (itemKey.getTag().equals(Tag.VALUE)) { |
235 | 2 | itemKey.setTag(Tag.STR); |
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} |
237 | 136266 | Node itemValue = composeNode(node, itemKey); |
238 | 136259 | children.add(new NodeTuple(itemKey, itemValue)); |
239 | 136259 | } |
240 | 23145 | Event endEvent = parser.getEvent(); |
241 | 23145 | node.setEndMark(endEvent.getEndMark()); |
242 | 23145 | return node; |
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} |
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} |