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package org.bukkit.configuration.file;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.logging.Level;
import org.apache.commons.lang.Validate;
import org.bukkit.Bukkit;
import org.bukkit.configuration.Configuration;
import org.bukkit.configuration.ConfigurationSection;
import org.bukkit.configuration.InvalidConfigurationException;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.error.YAMLException;
import org.yaml.snakeyaml.representer.Representer;
/**
* An implementation of {@link Configuration} which saves all files in Yaml.
* Note that this implementation is not synchronized.
*/
public class YamlConfiguration extends FileConfiguration {
protected static final String COMMENT_PREFIX = "# ";
protected static final String BLANK_CONFIG = "{}\n";
private final DumperOptions yamlOptions = new DumperOptions();
private final Representer yamlRepresenter = new YamlRepresenter();
private final Yaml yaml = new Yaml(new YamlConstructor(), yamlRepresenter, yamlOptions);
@Override
public String saveToString() {
yamlOptions.setIndent(options().indent());
yamlOptions.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
yamlRepresenter.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
String header = buildHeader();
String dump = yaml.dump(getValues(false));
if (dump.equals(BLANK_CONFIG)) {
dump = "";
}
return header + dump;
}
@Override
public void loadFromString(String contents) throws InvalidConfigurationException {
Validate.notNull(contents, "Contents cannot be null");
Map<?, ?> input;
try {
input = (Map<?, ?>) yaml.load(contents);
} catch (YAMLException e) {
throw new InvalidConfigurationException(e);
} catch (ClassCastException e) {
throw new InvalidConfigurationException("Top level is not a Map.");
}
String header = parseHeader(contents);
if (header.length() > 0) {
options().header(header);
}
if (input != null) {
convertMapsToSections(input, this);
}
}
protected void convertMapsToSections(Map<?, ?> input, ConfigurationSection section) {
for (Map.Entry<?, ?> entry : input.entrySet()) {
String key = entry.getKey().toString();
Object value = entry.getValue();
if (value instanceof Map) {
convertMapsToSections((Map<?, ?>) value, section.createSection(key));
} else {
section.set(key, value);
}
}
}
protected String parseHeader(String input) {
String[] lines = input.split("\r?\n", -1);
StringBuilder result = new StringBuilder();
boolean readingHeader = true;
boolean foundHeader = false;
for (int i = 0; (i < lines.length) && (readingHeader); i++) {
String line = lines[i];
if (line.startsWith(COMMENT_PREFIX)) {
if (i > 0) {
result.append("\n");
}
if (line.length() > COMMENT_PREFIX.length()) {
result.append(line.substring(COMMENT_PREFIX.length()));
}
foundHeader = true;
} else if ((foundHeader) && (line.length() == 0)) {
result.append("\n");
} else if (foundHeader) {
readingHeader = false;
}
}
return result.toString();
}
@Override
protected String buildHeader() {
String header = options().header();
if (options().copyHeader()) {
Configuration def = getDefaults();
if ((def != null) && (def instanceof FileConfiguration)) {
FileConfiguration filedefaults = (FileConfiguration) def;
String defaultsHeader = filedefaults.buildHeader();
if ((defaultsHeader != null) && (defaultsHeader.length() > 0)) {
return defaultsHeader;
}
}
}
if (header == null) {
return "";
}
StringBuilder builder = new StringBuilder();
String[] lines = header.split("\r?\n", -1);
boolean startedHeader = false;
for (int i = lines.length - 1; i >= 0; i--) {
builder.insert(0, "\n");
if ((startedHeader) || (lines[i].length() != 0)) {
builder.insert(0, lines[i]);
builder.insert(0, COMMENT_PREFIX);
startedHeader = true;
}
}
return builder.toString();
}
@Override
public YamlConfigurationOptions options() {
if (options == null) {
options = new YamlConfigurationOptions(this);
}
return (YamlConfigurationOptions) options;
}
/**
* Creates a new {@link YamlConfiguration}, loading from the given file.
* <p>
* Any errors loading the Configuration will be logged and then ignored.
* If the specified input is not a valid config, a blank config will be
* returned.
*
* @param file Input file
* @return Resulting configuration
* @throws IllegalArgumentException Thrown if file is null
*/
public static YamlConfiguration loadConfiguration(File file) {
Validate.notNull(file, "File cannot be null");
YamlConfiguration config = new YamlConfiguration();
try {
config.load(file);
} catch (FileNotFoundException ex) {
} catch (IOException ex) {
Bukkit.getLogger().log(Level.SEVERE, "Cannot load " + file, ex);
} catch (InvalidConfigurationException ex) {
Bukkit.getLogger().log(Level.SEVERE, "Cannot load " + file , ex);
}
return config;
}
/**
* Creates a new {@link YamlConfiguration}, loading from the given stream.
* <p>
* Any errors loading the Configuration will be logged and then ignored.
* If the specified input is not a valid config, a blank config will be
* returned.
*
* @param stream Input stream
* @return Resulting configuration
* @throws IllegalArgumentException Thrown if stream is null
*/
public static YamlConfiguration loadConfiguration(InputStream stream) {
Validate.notNull(stream, "Stream cannot be null");
YamlConfiguration config = new YamlConfiguration();
try {
config.load(stream);
} catch (IOException ex) {
Bukkit.getLogger().log(Level.SEVERE, "Cannot load configuration from stream", ex);
} catch (InvalidConfigurationException ex) {
Bukkit.getLogger().log(Level.SEVERE, "Cannot load configuration from stream", ex);
}
return config;
}
}
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