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package org.bukkit.util.config;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.SafeConstructor;
import org.yaml.snakeyaml.reader.UnicodeReader;
/**
* YAML configuration loader. This class is very far from finished, as it
* only supports simple property lookup at the moment. Lists and nodes will be
* supported in the future. For specifying node paths in the various get*()
* methods, they support SK's path notation, allowing you to select child nodes
* by using syntax in the form of root.parent.child. All node names are case
* sensitive. YAML files are loaded safely and Java objects will not
* be created if they are specified in the YAML file.
*
* @author sk89q
*/
public class Configuration {
private Yaml yaml = new Yaml(new SafeConstructor());
private File file;
private Map<String, Object> root;
public Configuration(File file) {
this.file = file;
}
/**
* Loads the configuration file. All errors are thrown away.
*/
public void load() {
FileInputStream stream = null;
try {
stream = new FileInputStream(file);
read(yaml.load(new UnicodeReader(stream)));
} catch (IOException e) {
root = new HashMap<String, Object>();
} catch (ConfigurationException e) {
root = new HashMap<String, Object>();
} finally {
try {
if (stream != null) {
stream.close();
}
} catch (IOException e) {
}
}
}
@SuppressWarnings("unchecked")
private void read(Object input) throws ConfigurationException {
try {
root = (Map<String, Object>)input;
} catch (ClassCastException e) {
throw new ConfigurationException("Root document must be an key-value structure");
}
}
/**
* Gets a property at a location. This will either return an Object
* or null, with null meaning that no configuration value exists at
* that location. This could potentially return a default value (not yet
* implemented) as defined by a plugin, if this is a plugin-tied
* configuration.
*
* @param path SK's dot notation supported
* @return object or null
*/
@SuppressWarnings("unchecked")
public Object getProperty(String path) {
if (!path.contains(".")) {
Object val = root.get(path);
if (val == null) {
return null;
}
return val;
}
String[] parts = path.split("\\.");
Map<String, Object> node = root;
for (int i = 0; i < parts.length; i++) {
Object o = node.get(parts[i]);
if (o == null) {
return null;
}
if (i == parts.length - 1) {
return o;
}
try {
node = (Map<String, Object>)o;
} catch (ClassCastException e) {
return null;
}
}
return null;
}
/**
* Gets a string at a location. This will either return an String
* or null, with null meaning that no configuration value exists at
* that location. If the object at the particular location is not actually
* a string, it will be converted to its string representation.
*
* @param path SK's dot notation supported
* @return string or null
*/
public String getString(String path) {
Object o = getProperty(path);
if (o == null) {
return null;
}
return o.toString();
}
/**
* Gets a string at a location. This will either return an String
* or the default value. If the object at the particular location is not
* actually a string, it will be converted to its string representation.
*
* @param path SK's dot notation supported
* @param def default value
* @return string or default
*/
public String getString(String path, String def) {
String o = getString(path);
if (o == null) {
return def;
}
return o;
}
/**
* Gets an integer at a location. This will either return an integer
* or the default value. If the object at the particular location is not
* actually a integer, the default value will be returned. However, other
* number types will be casted to an integer.
*
* @param path SK's dot notation supported
* @param def default value
* @return int or default
*/
public int getInt(String path, int def) {
Object o = getProperty(path);
if (o == null) {
return def;
} else if (o instanceof Byte) {
return (Byte)o;
} else if (o instanceof Integer) {
return (Integer)o;
} else if (o instanceof Double) {
return (int)(double)(Double)o;
} else if (o instanceof Float) {
return (int)(float)(Float)o;
} else if (o instanceof Long) {
return (int)(long)(Long)o;
} else {
return def;
}
}
/**
* Gets a double at a location. This will either return an double
* or the default value. If the object at the particular location is not
* actually a double, the default value will be returned. However, other
* number types will be casted to an double.
*
* @param path SK's dot notation supported
* @param def default value
* @return double or default
*/
public double getDouble(String path, double def) {
Object o = getProperty(path);
if (o == null) {
return def;
} else if (o instanceof Float) {
return (Float)o;
} else if (o instanceof Double) {
return (Double)o;
} else if (o instanceof Byte) {
return (Byte)o;
} else if (o instanceof Integer) {
return (Integer)o;
} else if (o instanceof Long) {
return (Long)o;
} else {
return def;
}
}
}
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