Java tutorial
/** * Copyright 2009-2017 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.javacrumbs.jsonunit.core.internal; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.node.NullNode; import java.io.IOException; import java.io.Reader; import java.math.BigDecimal; import java.util.Iterator; import java.util.Map; import static net.javacrumbs.jsonunit.core.internal.Utils.closeQuietly; /** * Deserializes node using Jackson 2 */ class Jackson2NodeFactory extends AbstractNodeFactory { private static final ObjectMapper mapper = new ObjectMapper(); private static final ObjectMapper lenientMapper = new ObjectMapper(); static { lenientMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true); lenientMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true); lenientMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true); } @Override protected Node convertValue(Object source) { return newNode(mapper.convertValue(source, JsonNode.class)); } @Override protected Node nullNode() { return newNode(NullNode.getInstance()); } protected Node readValue(Reader value, String label, boolean lenient) { try { return newNode(getMapper(lenient).readTree(value)); } catch (IOException e) { throw new IllegalArgumentException("Can not parse " + label + " value.", e); } finally { closeQuietly(value); } } private ObjectMapper getMapper(boolean lenient) { return lenient ? lenientMapper : mapper; } private static Node newNode(JsonNode jsonNode) { if (jsonNode != null && !jsonNode.isMissingNode()) { return new Jackson2Node(jsonNode); } else { return Node.MISSING_NODE; } } public boolean isPreferredFor(Object source) { return source instanceof JsonNode; } static final class Jackson2Node extends AbstractNode { private final JsonNode jsonNode; public Jackson2Node(JsonNode jsonNode) { this.jsonNode = jsonNode; } public Node element(int index) { return newNode(jsonNode.path(index)); } public Iterator<KeyValue> fields() { final Iterator<Map.Entry<String, JsonNode>> iterator = jsonNode.fields(); return new Iterator<KeyValue>() { public boolean hasNext() { return iterator.hasNext(); } public void remove() { iterator.remove(); } public KeyValue next() { Map.Entry<String, JsonNode> entry = iterator.next(); return new KeyValue(entry.getKey(), newNode(entry.getValue())); } }; } public Node get(String key) { return newNode(jsonNode.get(key)); } public boolean isMissingNode() { return false; } public boolean isNull() { return jsonNode.isNull(); } public Iterator<Node> arrayElements() { final Iterator<JsonNode> elements = jsonNode.elements(); return new Iterator<Node>() { public boolean hasNext() { return elements.hasNext(); } public Node next() { return newNode(elements.next()); } public void remove() { elements.remove(); } }; } public int size() { return jsonNode.size(); } public String asText() { return jsonNode.asText(); } public NodeType getNodeType() { if (jsonNode.isObject()) { return NodeType.OBJECT; } else if (jsonNode.isArray()) { return NodeType.ARRAY; } else if (jsonNode.isTextual()) { return NodeType.STRING; } else if (jsonNode.isNumber()) { return NodeType.NUMBER; } else if (jsonNode.isBoolean()) { return NodeType.BOOLEAN; } else if (jsonNode.isNull()) { return NodeType.NULL; } else { throw new IllegalStateException("Unexpected node type " + jsonNode); } } public BigDecimal decimalValue() { return jsonNode.decimalValue(); } public Boolean asBoolean() { return jsonNode.asBoolean(); } @Override public String toString() { return jsonNode.toString(); } } }