package net.csdn.common.settings;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import net.csdn.common.Booleans;
import net.csdn.common.Classes;
import net.csdn.common.Strings;
import net.csdn.common.io.Streams;
import net.csdn.common.property.PropertyPlaceholder;
import net.csdn.common.unit.ByteSizeUnit;
import net.csdn.common.unit.ByteSizeValue;
import net.csdn.common.unit.SizeValue;
import net.csdn.common.unit.TimeValue;
import net.csdn.exception.SettingsException;
import org.yaml.snakeyaml.Yaml;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.*;
import java.util.concurrent.TimeUnit;
import static com.google.common.collect.Lists.newArrayList;
import static com.google.common.collect.Maps.newHashMap;
import static net.csdn.common.Strings.toCamelCase;
import static net.csdn.common.unit.ByteSizeValue.parseBytesSizeValue;
import static net.csdn.common.unit.SizeValue.parseSizeValue;
import static net.csdn.common.unit.TimeValue.parseTimeValue;
/**
* BlogInfo: william
* Date: 11-9-1
* Time: 下午3:56
*/
public class ImmutableSettings implements Settings {
private ImmutableMap<String, String> settings;
private transient ClassLoader classLoader;
private ImmutableSettings(Map<String, String> settings, ClassLoader classLoader) {
this.settings = ImmutableMap.copyOf(settings);
this.classLoader = classLoader == null ? buildClassLoader() : classLoader;
}
@Override
public ClassLoader getClassLoader() {
return this.classLoader;
}
@Override
public ImmutableMap<String, String> getAsMap() {
return this.settings;
}
@Override
public Settings getByPrefix(String prefix) {
Builder builder = new Builder();
for (Map.Entry<String, String> entry : getAsMap().entrySet()) {
if (entry.getKey().startsWith(prefix)) {
if (entry.getKey().length() < prefix.length()) {
// ignore this one
continue;
}
builder.put(entry.getKey().substring(prefix.length()), entry.getValue());
}
}
builder.classLoader(classLoader);
return builder.build();
}
@Override
public String get(String setting) {
String retVal = settings.get(setting);
if (retVal != null) {
return retVal;
}
// try camel case version
return settings.get(toCamelCase(setting));
}
@Override
public String get(String setting, String defaultValue) {
String retVal = settings.get(setting);
return retVal == null ? defaultValue : retVal;
}
@Override
public Float getAsFloat(String setting, Float defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Float.parseFloat(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse float setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Double getAsDouble(String setting, Double defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Double.parseDouble(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse double setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Integer getAsInt(String setting, Integer defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Integer.parseInt(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse int setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Long getAsLong(String setting, Long defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Long.parseLong(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse long setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Boolean getAsBoolean(String setting, Boolean defaultValue) {
return Booleans.parseBoolean(get(setting), defaultValue);
}
public TimeValue getAsTime(String setting, TimeValue defaultValue) {
return parseTimeValue(get(setting), defaultValue);
}
public ByteSizeValue getAsBytesSize(String setting, ByteSizeValue defaultValue) throws SettingsException {
return parseBytesSizeValue(get(setting), defaultValue);
}
public SizeValue getAsSize(String setting, SizeValue defaultValue) throws SettingsException {
return parseSizeValue(get(setting), defaultValue);
}
@SuppressWarnings({"unchecked"})
@Override
public <T> Class<? extends T> getAsClass(String setting, Class<? extends T> defaultClazz) throws NoClassSettingsException {
String sValue = get(setting);
if (sValue == null) {
return defaultClazz;
}
try {
return (Class<? extends T>) getClassLoader().loadClass(sValue);
} catch (ClassNotFoundException e) {
throw new NoClassSettingsException("Failed to load class setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@SuppressWarnings({"unchecked"})
@Override
public <T> Class<? extends T> getAsClass(String setting, Class<? extends T> defaultClazz, String prefixPackage, String suffixClassName) throws NoClassSettingsException {
String sValue = get(setting);
if (sValue == null) {
return defaultClazz;
}
String fullClassName = sValue;
try {
return (Class<? extends T>) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e) {
fullClassName = prefixPackage + Strings.capitalize(toCamelCase(sValue)) + suffixClassName;
try {
return (Class<? extends T>) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e1) {
fullClassName = prefixPackage + toCamelCase(sValue).toLowerCase() + "." + Strings.capitalize(toCamelCase(sValue)) + suffixClassName;
try {
return (Class<? extends T>) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e2) {
throw new NoClassSettingsException("Failed to load class setting [" + setting + "] with value [" + sValue + "]", e);
}
}
}
}
@Override
public String[] getAsArray(String settingPrefix) throws SettingsException {
return getAsArray(settingPrefix, Strings.EMPTY_ARRAY);
}
@Override
public String[] getAsArray(String settingPrefix, String[] defaultArray) throws SettingsException {
List<String> result = Lists.newArrayList();
if (get(settingPrefix) != null) {
Collections.addAll(result, Strings.commaDelimitedListToStringArray(get(settingPrefix)));
}
int counter = 0;
while (true) {
String value = get(settingPrefix + '.' + (counter++));
if (value == null) {
break;
}
result.add(value);
}
if (result.isEmpty()) {
return defaultArray;
}
return result.toArray(new String[result.size()]);
}
@Override
public Map<String, Settings> getGroups(String settingPrefix) throws SettingsException {
if (settingPrefix.charAt(settingPrefix.length() - 1) != '.') {
settingPrefix = settingPrefix + ".";
}
// we don't really care that it might happen twice
Map<String, Map<String, String>> map = new LinkedHashMap<String, Map<String, String>>();
for (Object o : settings.keySet()) {
String setting = (String) o;
if (setting.startsWith(settingPrefix)) {
String nameValue = setting.substring(settingPrefix.length());
int dotIndex = nameValue.indexOf('.');
if (dotIndex == -1) {
throw new SettingsException("Failed to get setting group for [" + settingPrefix + "] setting prefix and setting [" + setting + "] because of a missing '.'");
}
String name = nameValue.substring(0, dotIndex);
String value = nameValue.substring(dotIndex + 1);
Map<String, String> groupSettings = map.get(name);
if (groupSettings == null) {
groupSettings = new LinkedHashMap<String, String>();
map.put(name, groupSettings);
}
groupSettings.put(value, get(setting));
}
}
Map<String, Settings> retVal = new LinkedHashMap<String, Settings>();
for (Map.Entry<String, Map<String, String>> entry : map.entrySet()) {
retVal.put(entry.getKey(), new ImmutableSettings(Collections.unmodifiableMap(entry.getValue()), classLoader));
}
return Collections.unmodifiableMap(retVal);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || this.getClass() != o.getClass()) return false;
ImmutableSettings that = (ImmutableSettings) o;
if (classLoader != null ? !classLoader.equals(that.classLoader) : that.classLoader != null) return false;
if (settings != null ? !settings.equals(that.settings) : that.settings != null) return false;
return true;
}
@Override
public int hashCode() {
int result = settings != null ? settings.hashCode() : 0;
result = 31 * result + (classLoader != null ? classLoader.hashCode() : 0);
return result;
}
private static ClassLoader buildClassLoader() {
return Classes.getDefaultClassLoader();
}
/**
* Returns a builder to be used in order to build settings.
*/
public static Builder settingsBuilder() {
return new Builder();
}
/**
* A builder allowing to put different settings and then {@link #build()} an immutable
* settings implementation. Use {@link ImmutableSettings#settingsBuilder()} in order to
* construct it.
*/
public static class Builder implements Settings.Builder {
public static final Settings EMPTY_SETTINGS = new Builder().build();
private final Map<String, String> map = new LinkedHashMap<String, String>();
private ClassLoader classLoader;
private Builder() {
}
public Map<String, String> internalMap() {
return this.map;
}
/**
* Removes the provided setting.
*/
public String remove(String key) {
return map.remove(key);
}
/**
* Returns a setting value based on the setting key.
*/
public String get(String key) {
String retVal = map.get(key);
if (retVal != null) {
return retVal;
}
// try camel case version
return map.get(toCamelCase(key));
}
/**
* Sets a setting with the provided setting key and value.
*
* @param key The setting key
* @param value The setting value
* @return The builder
*/
public Builder put(String key, String value) {
map.put(key, value);
return this;
}
/**
* Sets a setting with the provided setting key and class as value.
*
* @param key The setting key
* @param clazz The setting class value
* @return The builder
*/
public Builder put(String key, Class clazz) {
map.put(key, clazz.getName());
return this;
}
/**
* Sets the setting with the provided setting key and the boolean value.
*
* @param setting The setting key
* @param value The boolean value
* @return The builder
*/
public Builder put(String setting, boolean value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the int value.
*
* @param setting The setting key
* @param value The int value
* @return The builder
*/
public Builder put(String setting, int value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the long value.
*
* @param setting The setting key
* @param value The long value
* @return The builder
*/
public Builder put(String setting, long value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the float value.
*
* @param setting The setting key
* @param value The float value
* @return The builder
*/
public Builder put(String setting, float value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the double value.
*
* @param setting The setting key
* @param value The double value
* @return The builder
*/
public Builder put(String setting, double value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the time value.
*
* @param setting The setting key
* @param value The time value
* @return The builder
*/
public Builder put(String setting, long value, TimeUnit timeUnit) {
put(setting, timeUnit.toMillis(value));
return this;
}
/**
* Sets the setting with the provided setting key and the size value.
*
* @param setting The setting key
* @param value The size value
* @return The builder
*/
public Builder put(String setting, long value, ByteSizeUnit sizeUnit) {
put(setting, sizeUnit.toBytes(value));
return this;
}
/**
* Sets the setting with the provided setting key and an array of values.
*
* @param setting The setting key
* @param values The values
* @return The builder
*/
public Builder putArray(String setting, String... values) {
int counter = 0;
while (true) {
String value = map.remove(setting + '.' + (counter++));
if (value == null) {
break;
}
}
for (int i = 0; i < values.length; i++) {
put(setting + "." + i, values[i]);
}
return this;
}
/**
* Sets the setting group.
*/
public Builder put(String settingPrefix, String groupName, String[] settings, String[] values) throws SettingsException {
if (settings.length != values.length) {
throw new SettingsException("The settings length must match the value length");
}
for (int i = 0; i < settings.length; i++) {
if (values[i] == null) {
continue;
}
put(settingPrefix + "." + groupName + "." + settings[i], values[i]);
}
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Settings settings) {
map.putAll(settings.getAsMap());
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Map<String, String> settings) {
map.putAll(settings);
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Properties properties) {
for (Map.Entry entry : properties.entrySet()) {
map.put((String) entry.getKey(), (String) entry.getValue());
}
return this;
}
/**
* Loads settings from the actual string write that represents them using the
*/
public Builder loadFromSource(String source) {
try {
Map<String, String> loadedSettings = YamlSettingsLoader.load(source);
put(loadedSettings);
} catch (Exception e) {
throw new SettingsException("Failed to load settings from [" + source + "]");
}
return this;
}
/**
* Loads settings from a url that represents them using the
*/
public Builder loadFromUrl(URL url) throws SettingsException {
try {
return loadFromStream(url.toExternalForm(), url.openStream());
} catch (IOException e) {
throw new SettingsException("Failed to open stream for url [" + url.toExternalForm() + "]", e);
}
}
/**
* Loads settings from a stream that represents them using the
*/
public Builder loadFromStream(String resourceName, InputStream is) throws SettingsException {
try {
Map<String, String> loadedSettings = YamlSettingsLoader.load(Streams.copyToString(new InputStreamReader(is, "UTF-8")));
put(loadedSettings);
} catch (Exception e) {
throw new SettingsException("Failed to load settings from [" + resourceName + "]", e);
}
return this;
}
/**
* Loads settings from classpath that represents them using the
*/
public Builder loadFromClasspath(String resourceName) throws SettingsException {
ClassLoader classLoader = this.classLoader;
if (classLoader == null) {
classLoader = buildClassLoader();
}
InputStream is = classLoader.getResourceAsStream(resourceName);
if (is == null) {
return this;
}
return loadFromStream(resourceName, is);
}
/**
* Sets the class loader associated with the settings built.
*/
public Builder classLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
return this;
}
/**
* Runs across all the settings set on this builder and replaces <tt>${...}</tt> elements in the
* each setting value according to the following logic:
* <p/>
* <p>First, tries to resolve it against a System property ({@link System#getProperty(String)}), next,
* tries and resolve it against an environment variable ({@link System#getenv(String)}), and last, tries
* and replace it with another setting already set on this builder.
*/
public Builder replacePropertyPlaceholders() {
PropertyPlaceholder propertyPlaceholder = new PropertyPlaceholder("${", "}", false);
PropertyPlaceholder.PlaceholderResolver placeholderResolver = new PropertyPlaceholder.PlaceholderResolver() {
@Override
public String resolvePlaceholder(String placeholderName) {
String value = System.getProperty(placeholderName);
if (value != null) {
return value;
}
value = System.getenv(placeholderName);
if (value != null) {
return value;
}
return map.get(placeholderName);
}
};
for (Map.Entry<String, String> entry : map.entrySet()) {
map.put(entry.getKey(), propertyPlaceholder.replacePlaceholders(entry.getValue(), placeholderResolver));
}
return this;
}
/**
* Puts all the properties with keys starting with the provided <tt>prefix</tt>.
*
* @param prefix The prefix to filter proeprty key by
* @param properties The properties to put
* @return The builder
*/
public Builder putProperties(String prefix, Properties properties) {
for (Object key1 : properties.keySet()) {
String key = (String) key1;
String value = properties.getProperty(key);
if (key.startsWith(prefix)) {
map.put(key.substring(prefix.length()), value);
}
}
return this;
}
/**
* Builds a {@link Settings} (underlying uses {@link ImmutableSettings}) based on everything
* set on this builder.
*/
public Settings build() {
return new ImmutableSettings(Collections.unmodifiableMap(map), classLoader);
}
}
public static class YamlSettingsLoader {
public static Map<String, String> load(String source) throws IOException {
// replace tabs with whitespace (yaml does not accept tabs, but many users might use it still...)
source = source.replace("\t", " ");
Yaml yaml = new Yaml();
Map<Object, Object> yamlMap = (Map<Object, Object>) yaml.load(source);
StringBuilder sb = new StringBuilder();
Map<String, String> settings = newHashMap();
if (yamlMap == null) {
return settings;
}
List<String> path = newArrayList();
serializeMap(settings, sb, path, yamlMap);
return settings;
}
public static Map<String, String> load(byte[] source) throws IOException {
Yaml yaml = new Yaml();
Map<Object, Object> yamlMap = (Map<Object, Object>) yaml.load(source.toString());
StringBuilder sb = new StringBuilder();
Map<String, String> settings = newHashMap();
if (yamlMap == null) {
return settings;
}
List<String> path = newArrayList();
serializeMap(settings, sb, path, yamlMap);
return settings;
}
private static void serializeMap(Map<String, String> settings, StringBuilder sb, List<String> path, Map<Object, Object> yamlMap) {
for (Map.Entry<Object, Object> entry : yamlMap.entrySet()) {
if (entry.getValue() instanceof Map) {
path.add((String) entry.getKey());
serializeMap(settings, sb, path, (Map<Object, Object>) entry.getValue());
path.remove(path.size() - 1);
} else if (entry.getValue() instanceof List) {
path.add((String) entry.getKey());
serializeList(settings, sb, path, (List) entry.getValue());
path.remove(path.size() - 1);
} else {
serializeValue(settings, sb, path, (String) entry.getKey(), entry.getValue());
}
}
}
private static void serializeList(Map<String, String> settings, StringBuilder sb, List<String> path, List yamlList) {
int counter = 0;
for (Object listEle : yamlList) {
if (listEle instanceof Map) {
path.add(Integer.toString(counter));
serializeMap(settings, sb, path, (Map<Object, Object>) listEle);
path.remove(path.size() - 1);
} else if (listEle instanceof List) {
path.add(Integer.toString(counter));
serializeList(settings, sb, path, (List) listEle);
path.remove(path.size() - 1);
} else {
serializeValue(settings, sb, path, Integer.toString(counter), listEle);
}
counter++;
}
}
private static void serializeValue(Map<String, String> settings, StringBuilder sb, List<String> path, String name, Object value) {
if (value == null) {
return;
}
sb.setLength(0);
for (String pathEle : path) {
sb.append(pathEle).append('.');
}
sb.append(name);
settings.put(sb.toString(), value.toString());
}
}
}