Phillip Webb
11 years ago
39 changed files with 513 additions and 403 deletions
@ -0,0 +1,172 @@
@@ -0,0 +1,172 @@
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/* |
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* Copyright 2012-2014 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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|
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package org.springframework.boot.json; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.LinkedHashMap; |
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import java.util.List; |
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import java.util.Map; |
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import org.springframework.util.StringUtils; |
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/** |
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* Really basic JSON parser for when you have nothing else available. Comes with some |
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* limitations with respect to the JSON specification (e.g. only supports String values), |
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* so users will probably prefer to have a library handle things instead (Jackson or Snake |
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* YAML are supported). |
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* |
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* @author Dave Syer |
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* @see JsonParserFactory |
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* @since 1.2.0 |
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*/ |
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public class BasicJsonParser implements JsonParser { |
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@Override |
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public Map<String, Object> parseMap(String json) { |
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if (json != null) { |
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json = json.trim(); |
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if (json.startsWith("{")) { |
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return parseMapInternal(json); |
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} |
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else if (json.equals("")) { |
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return new HashMap<String, Object>(); |
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} |
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} |
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return null; |
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} |
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@Override |
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public List<Object> parseList(String json) { |
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if (json != null) { |
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json = json.trim(); |
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if (json.startsWith("[")) { |
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return parseListInternal(json); |
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} |
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else if (json.trim().equals("")) { |
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return new ArrayList<Object>(); |
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} |
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} |
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return null; |
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} |
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private List<Object> parseListInternal(String json) { |
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List<Object> list = new ArrayList<Object>(); |
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json = trimLeadingCharacter(trimTrailingCharacter(json, ']'), '['); |
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for (String value : tokenize(json)) { |
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list.add(parseInternal(value)); |
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} |
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return list; |
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} |
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private Object parseInternal(String json) { |
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if (json.startsWith("[")) { |
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return parseListInternal(json); |
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} |
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if (json.startsWith("{")) { |
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return parseMapInternal(json); |
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} |
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if (json.startsWith("\"")) { |
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return trimTrailingCharacter(trimLeadingCharacter(json, '"'), '"'); |
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} |
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try { |
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return Long.valueOf(json); |
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} |
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catch (NumberFormatException ex) { |
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// ignore
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} |
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try { |
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return Double.valueOf(json); |
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} |
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catch (NumberFormatException ex) { |
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// ignore
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} |
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return json; |
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} |
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private static String trimTrailingCharacter(String string, char c) { |
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if (string.length() >= 0 && string.charAt(string.length() - 1) == c) { |
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return string.substring(0, string.length() - 1); |
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} |
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return string; |
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} |
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private static String trimLeadingCharacter(String string, char c) { |
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if (string.length() >= 0 && string.charAt(0) == c) { |
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return string.substring(1); |
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} |
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return string; |
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} |
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private Map<String, Object> parseMapInternal(String json) { |
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Map<String, Object> map = new LinkedHashMap<String, Object>(); |
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json = trimLeadingCharacter(trimTrailingCharacter(json, '}'), '{'); |
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for (String pair : tokenize(json)) { |
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String[] values = StringUtils.trimArrayElements(StringUtils.split(pair, ":")); |
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String key = trimLeadingCharacter(trimTrailingCharacter(values[0], '"'), '"'); |
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Object value = null; |
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if (values.length > 0) { |
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String string = trimLeadingCharacter( |
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trimTrailingCharacter(values[1], '"'), '"'); |
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value = parseInternal(string); |
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} |
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map.put(key, value); |
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} |
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return map; |
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} |
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private List<String> tokenize(String json) { |
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List<String> list = new ArrayList<String>(); |
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int index = 0; |
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int inObject = 0; |
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int inList = 0; |
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StringBuilder build = new StringBuilder(); |
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while (index < json.length()) { |
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char current = json.charAt(index); |
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if (current == '{') { |
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inObject++; |
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} |
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if (current == '}') { |
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inObject--; |
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} |
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if (current == '[') { |
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inList++; |
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} |
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if (current == ']') { |
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inList--; |
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} |
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if (current == ',' && inObject == 0 && inList == 0) { |
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list.add(build.toString()); |
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build.setLength(0); |
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} |
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else { |
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build.append(current); |
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} |
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index++; |
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} |
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if (build.length() > 0) { |
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list.add(build.toString()); |
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} |
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return list; |
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} |
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} |
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@ -0,0 +1,64 @@
@@ -0,0 +1,64 @@
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/* |
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* Copyright 2012-2014 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.boot.json; |
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import java.util.ArrayList; |
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import java.util.LinkedHashMap; |
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import java.util.List; |
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import java.util.Map; |
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import org.json.simple.parser.JSONParser; |
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import org.json.simple.parser.ParseException; |
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/** |
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* Thin wrapper to adapt {@link org.json.simple.JSONObject} to a {@link JsonParser}. |
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* |
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* @author Dave Syer |
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* @since 1.2.0 |
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* @see JsonParserFactory |
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*/ |
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public class JsonSimpleJsonParser implements JsonParser { |
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@Override |
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public Map<String, Object> parseMap(String json) { |
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Map<String, Object> map = new LinkedHashMap<String, Object>(); |
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try { |
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@SuppressWarnings("unchecked") |
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Map<String, Object> value = (Map<String, Object>) new JSONParser() |
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.parse(json); |
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map.putAll(value); |
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} |
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catch (ParseException ex) { |
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throw new IllegalArgumentException("Cannot parse JSON", ex); |
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} |
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return map; |
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} |
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@Override |
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public List<Object> parseList(String json) { |
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List<Object> nested = new ArrayList<Object>(); |
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try { |
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@SuppressWarnings("unchecked") |
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List<Object> value = (List<Object>) new JSONParser().parse(json); |
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nested.addAll(value); |
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} |
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catch (ParseException ex) { |
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throw new IllegalArgumentException("Cannot parse JSON", ex); |
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} |
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return nested; |
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} |
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} |
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@ -1,85 +0,0 @@
@@ -1,85 +0,0 @@
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/* |
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* Copyright 2012-2014 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.boot.json; |
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import java.util.ArrayList; |
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import java.util.LinkedHashMap; |
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import java.util.List; |
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import java.util.Map; |
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import org.json.JSONArray; |
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import org.json.JSONObject; |
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/** |
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* Thin wrapper to adapt {@link JSONObject} to a {@link JsonParser}. |
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* |
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* @author Dave Syer |
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* @since 1.2.0 |
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* @see JsonParserFactory |
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*/ |
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public class SimpleJsonJsonParser implements JsonParser { |
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@Override |
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public Map<String, Object> parseMap(String json) { |
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Map<String, Object> map = new LinkedHashMap<String, Object>(); |
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putAll(map, new JSONObject(json)); |
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return map; |
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} |
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private void putAll(Map<String, Object> map, JSONObject object) { |
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for (Object key : object.keySet()) { |
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String name = key.toString(); |
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Object value = object.get(name); |
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if (value instanceof JSONObject) { |
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Map<String, Object> nested = new LinkedHashMap<String, Object>(); |
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putAll(nested, (JSONObject) value); |
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value = nested; |
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} |
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if (value instanceof JSONArray) { |
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List<Object> nested = new ArrayList<Object>(); |
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addAll(nested, (JSONArray) value); |
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value = nested; |
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} |
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map.put(name, value); |
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} |
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} |
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private void addAll(List<Object> list, JSONArray array) { |
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for (int i = 0; i < array.length(); i++) { |
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Object value = array.get(i); |
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if (value instanceof JSONObject) { |
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Map<String, Object> nested = new LinkedHashMap<String, Object>(); |
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putAll(nested, (JSONObject) value); |
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value = nested; |
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} |
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if (value instanceof JSONArray) { |
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List<Object> nested = new ArrayList<Object>(); |
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addAll(nested, (JSONArray) value); |
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value = nested; |
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} |
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list.add(value); |
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} |
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} |
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@Override |
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public List<Object> parseList(String json) { |
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List<Object> nested = new ArrayList<Object>(); |
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addAll(nested, new JSONArray(json)); |
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return nested; |
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} |
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} |
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@ -0,0 +1,31 @@
@@ -0,0 +1,31 @@
|
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/* |
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* Copyright 2012-2014 the original author or authors. |
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* |
||||
* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
||||
* |
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* 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. |
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* See the License for the specific language governing permissions and |
||||
* limitations under the License. |
||||
*/ |
||||
|
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package org.springframework.boot.json; |
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|
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/** |
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* Tests for {@link BasicJsonParser}. |
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* |
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* @author Dave Syer |
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*/ |
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public class BasicJsonParserTests extends AbstractJsonParserTests { |
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@Override |
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protected JsonParser getParser() { |
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return new BasicJsonParser(); |
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} |
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|
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} |
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