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net.gdface.utils.Configuration Maven / Gradle / Ivy
/**
* @Title: Configuratoin.java
* @Package net.gdface.utils
* @Description: 管理properties文件
* @author guyadong
* @date 2014-10-14 下午3:20:09
* @version V1.0
*/
package net.gdface.utils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.util.Properties;
import java.util.Map.Entry;
/**读取配置文件(properties)中的参数
* @author guyadong
*
*/
public class Configuration extends Properties{
private static final long serialVersionUID = -3929851625670931787L;
/**
* property 属性名前缀,在调用{@link #getProperty(String)}或其他getProperty方法时参数会自动加上该前缀,默认为"",
* 如prefix为 net.gdface.facedbsdk.FaceDbSDKLocal
* 调用getProperty("minThread")时，其实是执行getProperty("net.gdface.facedbsdk.FaceDbSDKLocal.minThread")
*/
private ThreadLocal prefixs = new ThreadLocal() {
@Override
protected String initialValue() {
return "";//prefix初始值为""
}
};
/**使用指定的ClassLoader加载properties文件propFile
* @param classLoader
* @param propFile
* @throws IOException
* @see #configure(URL)
*/
public Configuration(ClassLoader classLoader,String propFile) throws IOException {
URL url= classLoader.getResource(propFile);
if(null==url)
throw new IOException(String.format("Cant found resource [%s] by %s",propFile,classLoader.getClass().getName()));
configure(url);
}
/**
* 从{@link File}构造对象
* @param propFile
* @throws IOException
*/
public Configuration(File propFile) throws IOException {
this(propFile.toURI().toURL());
}
public Configuration() {
super();
}
public Configuration(Properties defaults) {
super(defaults);
}
/**
* @param url
* @throws IOException
*/
public Configuration(URL url) throws IOException {
configure(url);
}
/**
* 根据{@link URL}加载配置文件
* @param url
* @throws IOException
* @see #configure(InputStream)
*/
private void configure(URL url) throws IOException {
if(null==url)
throw new NullPointerException("parameter [url] is null");
System.out.printf("Load properties from [%s]\n", url.toString());
InputStream is = url.openStream();
try {
load(is);
} finally {
is.close();
}
}
/**
* 读取指定的key，用静态valueOf方法(如果有)将之转换成clazz指定的类型 T _getPropertyBaseType(String key, Class clazz) {
if (null == key||0==key.length())
throw new IllegalArgumentException("the argument 'key' must not be null or empty");
if (null == clazz)
throw new IllegalArgumentException("the argument 'clazz' must not be null");
String value = getProperty(key);
try {
return null == value|| 0 == value.length() ? null : (T) clazz.getMethod("valueOf", String.class).invoke(null, value.trim());
} catch (NoSuchMethodException e) {
new RuntimeException(
String.format("%s:not found static method 'valueOf' for %s", e.getClass().getSimpleName(),
clazz.getName()), e);
} catch (IllegalAccessException e) {
new RuntimeException(
String.format("%s:can't invoke method 'valueOf' for %s", e.getClass().getSimpleName(),
clazz.getName()), e);
} catch (InvocationTargetException e) {
try {
throw e.getCause();
} catch (NumberFormatException ie) {
System.out.printf("%s: [%s=%s] can't be convert to %s\n", e.getClass().getSimpleName(), key, value,
clazz.getName());
} catch (Throwable ie) {
new RuntimeException(ie);
}
}
return null;
}
/**
* 设置指定的key为value
*
* @param key
* 为{@link null}时抛出 {@link IllegalArgumentException} T _setPropertyBaseType(String key, T value) {
if (null == key||0==key.length())
throw new IllegalArgumentException("the argument 'key' must not be null or empty");
// value为null时删除key,并返回null
if(null==value){remove(key);return null;}
try {
String old = (String) setProperty(key,value.toString());
return null == old|| 0 == old.length() ? null : (T) value.getClass().getMethod("valueOf", String.class).invoke(null, old.trim());
} catch (NoSuchMethodException e) {
new RuntimeException(
String.format("%s:not found static method 'valueOf' for %s", e.getClass().getSimpleName(),
value.getClass().getName()), e);
} catch (IllegalAccessException e) {
new RuntimeException(
String.format("%s:can't invoke method 'valueOf' for %s", e.getClass().getSimpleName(),
value.getClass().getName()), e);
} catch (InvocationTargetException e) {
try {
throw e.getCause();
} catch (NumberFormatException ie) {
System.out.printf("%s: [%s=%s] can't be convert to %s\n", e.getClass().getSimpleName(), key, value.toString(),
value.getClass().getName());
} catch (Throwable ie) {
new RuntimeException(ie);
}
}
return null;
}
@Override
public String getProperty(String key) {
return super.getProperty(this.getPrefix()+key);
}
@Override
public String getProperty(String key, String defaultValue) {
return super.getProperty(key, defaultValue);
}
@Override
public synchronized Object setProperty(String key, String value) {
return super.setProperty(this.getPrefix()+key, value);
}
/**读取指定的key，将之转换成与defaultValue类型相同的对象，如果key不存在或转换出错则返回defaultValue
* @param key
* @param defaultValue 缺省值
* @return value
*/
public T getPropertyBaseType(String key, T defaultValue) {
if (null == defaultValue)
throw new IllegalArgumentException("the argument 'defaultValue' must not be null");
@SuppressWarnings("unchecked")
T res = (T) _getPropertyBaseType(key,defaultValue.getClass());
return ((null==res)?defaultValue:res);
}
public Boolean getPropertyBoolean(String key) {
return _getPropertyBaseType(key, Boolean.class);
}
public Boolean getPropertyBoolean(String key, Boolean defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Byte getPropertyByte(String key) {
return _getPropertyBaseType(key, Byte.class);
}
public Byte getPropertyByte(String key,Byte defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Double getPropertyDouble(String key) {
return _getPropertyBaseType(key, Double.class);
}
public Double getPropertyDouble(String key,Double defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Float getPropertyFloat(String key) {
return _getPropertyBaseType(key, Float.class);
}
public Float getPropertyFloat(String key,Float defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Integer getPropertyInteger(String key) {
return _getPropertyBaseType(key, Integer.class);
}
public Integer getPropertyInteger(String key,Integer defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Long getPropertyLong(String key) {
return _getPropertyBaseType(key, Long.class);
}
public Long getPropertyLong(String key,Long defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
public Short getPropertyShort(String key) {
return _getPropertyBaseType(key, Short.class);
}
public Short getPropertyShort(String key,Short defaultValue) {
return getPropertyBaseType(key, defaultValue);
}
//////////////
public Boolean setPropertyBoolean(String key, Boolean value) {
return _setPropertyBaseType(key, value);
}
public Byte setPropertyByte(String key,Byte value) {
return _setPropertyBaseType(key, value);
}
public Double setPropertyDouble(String key,Double value) {
return _setPropertyBaseType(key, value);
}
public Float setPropertyFloat(String key,Float value) {
return _setPropertyBaseType(key, value);
}
public Integer setPropertyInteger(String key,Integer value) {
return _setPropertyBaseType(key, value);
}
public Long setPropertyLong(String key,Long value) {
return _setPropertyBaseType(key, value);
}
public Short setPropertyShort(String key,Short value) {
return _setPropertyBaseType(key, value);
}
public void setPropertyBooleanIfAbsent(String key, Boolean value) {
if(!containsKey(key)){
setPropertyBoolean(key, value);
}
}
public void setPropertyIfAbsent(String key, String value) {
if(!containsKey(key)){
setProperty(key, value);
}
}
public void setPropertyByteIfAbsent(String key,Byte value) {
if(!containsKey(key)){
setPropertyByte(key, value);
}
}
public void setPropertyDoubleIfAbsent(String key,Double value) {
if(!containsKey(key)){
setPropertyDouble(key, value);
}
}
public void setPropertyFloatIfAbsent(String key,Float value) {
if(!containsKey(key)){
setPropertyFloat(key, value);
}
}
public void setPropertyIntegerIfAbsent(String key,Integer value) {
if(!containsKey(key)){
setPropertyInteger(key, value);
}
}
public void setPropertyLongIfAbsent(String key,Long value) {
if(!containsKey(key)){
setPropertyLong(key, value);
}
}
public void setPropertyShortIfAbsent(String key,Short value) {
if(!containsKey(key)){
setPropertyShort(key, value);
}
}
/**如果参数为null，则prefix设置为""
* @param prefix 要设置的 prefix
* @return 当前对象
*/
public Configuration setPrefix(String prefix) {
prefixs.set(null==prefix?"":prefix);
return this;
}
/**
* 设置 {@link #prefixs}空
* @return 当前对象
*/
public Configuration resetPrefix() {
return setPrefix(null);
}
/**
* @return prefix
*/
public String getPrefix() {
return prefixs.get();
}
/**
* 返回如果指定了 {@link java.util.Properties#defaults},则返回所有相对增加或修改的值 entry:entrySet()){
String key=(String) entry.getKey();
String value=(String)entry.getValue();
if(!defaults.containsKey(key)||!value.equals(defaults.getProperty(key))){
out.setProperty(key, value);
}
}
return out;
}
}
