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org.elasticsearch.common.xcontent.support.XContentMapValues Maven / Gradle / Ivy
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.common.xcontent.support;
import com.google.common.collect.Maps;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.unit.TimeValue;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
*
*/
public class XContentMapValues {
/**
* Extracts raw values (string, int, and so on) based on the path provided returning all of them
* as a single list.
*/
public static List extractRawValues(String path, Map map) {
List values = new ArrayList<>();
String[] pathElements = Strings.splitStringToArray(path, '.');
if (pathElements.length == 0) {
return values;
}
extractRawValues(values, map, pathElements, 0);
return values;
}
@SuppressWarnings({"unchecked"})
private static void extractRawValues(List values, Map part, String[] pathElements, int index) {
if (index == pathElements.length) {
return;
}
String key = pathElements[index];
Object currentValue = part.get(key);
int nextIndex = index + 1;
while (currentValue == null && nextIndex != pathElements.length) {
key += "." + pathElements[nextIndex];
currentValue = part.get(key);
nextIndex++;
}
if (currentValue == null) {
return;
}
if (currentValue instanceof Map) {
extractRawValues(values, (Map) currentValue, pathElements, nextIndex);
} else if (currentValue instanceof List) {
extractRawValues(values, (List) currentValue, pathElements, nextIndex);
} else {
values.add(currentValue);
}
}
@SuppressWarnings({"unchecked"})
private static void extractRawValues(List values, List part, String[] pathElements, int index) {
for (Object value : part) {
if (value == null) {
continue;
}
if (value instanceof Map) {
extractRawValues(values, (Map) value, pathElements, index);
} else if (value instanceof List) {
extractRawValues(values, (List) value, pathElements, index);
} else {
values.add(value);
}
}
}
public static Object extractValue(String path, Map map) {
String[] pathElements = Strings.splitStringToArray(path, '.');
if (pathElements.length == 0) {
return null;
}
return extractValue(pathElements, 0, map);
}
@SuppressWarnings({"unchecked"})
private static Object extractValue(String[] pathElements, int index, Object currentValue) {
if (index == pathElements.length) {
return currentValue;
}
if (currentValue == null) {
return null;
}
if (currentValue instanceof Map) {
Map map = (Map) currentValue;
String key = pathElements[index];
Object mapValue = map.get(key);
int nextIndex = index + 1;
while (mapValue == null && nextIndex != pathElements.length) {
key += "." + pathElements[nextIndex];
mapValue = map.get(key);
nextIndex++;
}
return extractValue(pathElements, nextIndex, mapValue);
}
if (currentValue instanceof List) {
List valueList = (List) currentValue;
List newList = new ArrayList(valueList.size());
for (Object o : valueList) {
Object listValue = extractValue(pathElements, index, o);
if (listValue != null) {
newList.add(listValue);
}
}
return newList;
}
return null;
}
public static Map filter(Map map, String[] includes, String[] excludes) {
Map result = Maps.newHashMap();
filter(map, result, includes == null ? Strings.EMPTY_ARRAY : includes, excludes == null ? Strings.EMPTY_ARRAY : excludes, new StringBuilder());
return result;
}
private static void filter(Map map, Map into, String[] includes, String[] excludes, StringBuilder sb) {
if (includes.length == 0 && excludes.length == 0) {
into.putAll(map);
return;
}
for (Map.Entry entry : map.entrySet()) {
String key = entry.getKey();
int mark = sb.length();
if (sb.length() > 0) {
sb.append('.');
}
sb.append(key);
String path = sb.toString();
if (Regex.simpleMatch(excludes, path)) {
sb.setLength(mark);
continue;
}
boolean exactIncludeMatch = false; // true if the current position was specifically mentioned
boolean pathIsPrefixOfAnInclude = false; // true if potentially a sub scope can be included
if (includes.length == 0) {
// implied match anything
exactIncludeMatch = true;
} else {
for (String include : includes) {
// check for prefix matches as well to see if we need to zero in, something like: obj1.arr1.* or *.field
// note, this does not work well with middle matches, like obj1.*.obj3
if (include.charAt(0) == '*') {
if (Regex.simpleMatch(include, path)) {
exactIncludeMatch = true;
break;
}
pathIsPrefixOfAnInclude = true;
continue;
}
if (include.startsWith(path)) {
if (include.length() == path.length()) {
exactIncludeMatch = true;
break;
} else if (include.length() > path.length() && include.charAt(path.length()) == '.') {
// include might may match deeper paths. Dive deeper.
pathIsPrefixOfAnInclude = true;
continue;
}
}
if (Regex.simpleMatch(include, path)) {
exactIncludeMatch = true;
break;
}
}
}
if (!(pathIsPrefixOfAnInclude || exactIncludeMatch)) {
// skip subkeys, not interesting.
sb.setLength(mark);
continue;
}
if (entry.getValue() instanceof Map) {
Map innerInto = Maps.newHashMap();
// if we had an exact match, we want give deeper excludes their chance
filter((Map) entry.getValue(), innerInto, exactIncludeMatch ? Strings.EMPTY_ARRAY : includes, excludes, sb);
if (exactIncludeMatch || !innerInto.isEmpty()) {
into.put(entry.getKey(), innerInto);
}
} else if (entry.getValue() instanceof List) {
List list = (List) entry.getValue();
List innerInto = new ArrayList<>(list.size());
// if we had an exact match, we want give deeper excludes their chance
filter(list, innerInto, exactIncludeMatch ? Strings.EMPTY_ARRAY : includes, excludes, sb);
into.put(entry.getKey(), innerInto);
} else if (exactIncludeMatch) {
into.put(entry.getKey(), entry.getValue());
}
sb.setLength(mark);
}
}
private static void filter(List from, List to, String[] includes, String[] excludes, StringBuilder sb) {
if (includes.length == 0 && excludes.length == 0) {
to.addAll(from);
return;
}
for (Object o : from) {
if (o instanceof Map) {
Map innerInto = Maps.newHashMap();
filter((Map) o, innerInto, includes, excludes, sb);
if (!innerInto.isEmpty()) {
to.add(innerInto);
}
} else if (o instanceof List) {
List innerInto = new ArrayList<>();
filter((List) o, innerInto, includes, excludes, sb);
if (!innerInto.isEmpty()) {
to.add(innerInto);
}
} else {
to.add(o);
}
}
}
public static boolean isObject(Object node) {
return node instanceof Map;
}
public static boolean isArray(Object node) {
return node instanceof List;
}
public static String nodeStringValue(Object node, String defaultValue) {
if (node == null) {
return defaultValue;
}
return node.toString();
}
public static float nodeFloatValue(Object node, float defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeFloatValue(node);
}
public static float nodeFloatValue(Object node) {
if (node instanceof Number) {
return ((Number) node).floatValue();
}
return Float.parseFloat(node.toString());
}
public static double nodeDoubleValue(Object node, double defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeDoubleValue(node);
}
public static double nodeDoubleValue(Object node) {
if (node instanceof Number) {
return ((Number) node).doubleValue();
}
return Double.parseDouble(node.toString());
}
public static int nodeIntegerValue(Object node) {
if (node instanceof Number) {
return ((Number) node).intValue();
}
return Integer.parseInt(node.toString());
}
public static int nodeIntegerValue(Object node, int defaultValue) {
if (node == null) {
return defaultValue;
}
if (node instanceof Number) {
return ((Number) node).intValue();
}
return Integer.parseInt(node.toString());
}
public static short nodeShortValue(Object node, short defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeShortValue(node);
}
public static short nodeShortValue(Object node) {
if (node instanceof Number) {
return ((Number) node).shortValue();
}
return Short.parseShort(node.toString());
}
public static byte nodeByteValue(Object node, byte defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeByteValue(node);
}
public static byte nodeByteValue(Object node) {
if (node instanceof Number) {
return ((Number) node).byteValue();
}
return Byte.parseByte(node.toString());
}
public static long nodeLongValue(Object node, long defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeLongValue(node);
}
public static long nodeLongValue(Object node) {
if (node instanceof Number) {
return ((Number) node).longValue();
}
return Long.parseLong(node.toString());
}
public static boolean nodeBooleanValue(Object node, boolean defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeBooleanValue(node);
}
public static boolean nodeBooleanValue(Object node) {
if (node instanceof Boolean) {
return (Boolean) node;
}
if (node instanceof Number) {
return ((Number) node).intValue() != 0;
}
String value = node.toString();
return !(value.equals("false") || value.equals("0") || value.equals("off"));
}
public static TimeValue nodeTimeValue(Object node, TimeValue defaultValue) {
if (node == null) {
return defaultValue;
}
return nodeTimeValue(node);
}
public static TimeValue nodeTimeValue(Object node) {
if (node instanceof Number) {
return TimeValue.timeValueMillis(((Number) node).longValue());
}
return TimeValue.parseTimeValue(node.toString(), null, XContentMapValues.class.getSimpleName() + ".nodeTimeValue");
}
public static Map nodeMapValue(Object node, String desc) {
if (node instanceof Map) {
return (Map) node;
} else {
throw new ElasticsearchParseException(desc + " should be a hash but was of type: " + node.getClass());
}
}
/**
* Returns an array of string value from a node value.
*
* If the node represents an array the corresponding array of strings is returned.
* Otherwise the node is treated as a comma-separated string.
*/
public static String[] nodeStringArrayValue(Object node) {
if (isArray(node)) {
List list = (List) node;
String[] arr = new String[list.size()];
for (int i = 0; i < arr.length; i++) {
arr[i] = nodeStringValue(list.get(i), null);
}
return arr;
} else {
return Strings.splitStringByCommaToArray(node.toString());
}
}
}
