com.github.obase.config.SimplePropertyResolver Maven / Gradle / Ivy
package com.github.obase.config;
import java.util.Collections;
import java.util.Map;
import org.springframework.core.env.AbstractPropertyResolver;
import org.springframework.util.ClassUtils;
import com.github.obase.WrappedException;
@SuppressWarnings({ "unchecked", "rawtypes" })
final class SimplePropertyResolver extends AbstractPropertyResolver {
static final Map NULL = Collections.emptyMap();
final Map statics;
final Map systemProperties;
final Map systemEnvironment;
public SimplePropertyResolver(Map statics, Map systemProperties, Map systemEnvironment) {
this.statics = statics == null ? NULL : statics;
this.systemProperties = systemProperties == null ? NULL : systemProperties;
this.systemEnvironment = systemEnvironment == null ? NULL : systemEnvironment;
}
@Override
public boolean containsProperty(String key) {
if (statics.containsKey(key)) {
return true;
} else if (systemProperties.containsKey(key)) {
return true;
} else if (systemEnvironment.containsKey(key)) {
return true;
}
return false;
}
@Override
public String getProperty(String key) {
String val = (String) statics.get(key);
if (val != null) {
return val;
}
val = (String) systemProperties.get(key);
if (val != null) {
return val;
}
val = (String) systemEnvironment.get(key);
return val;
}
@Override
public T getProperty(String key, Class targetType) {
String value = getProperty(key);
if (value != null) {
value = resolveNestedPlaceholders(value);
if (!getConversionService().canConvert(String.class, targetType)) {
throw new IllegalArgumentException(String.format("Cannot convert value [%s] from source type [%s] to target type [%s]", value, String.class.getSimpleName(), targetType.getSimpleName()));
}
return getConversionService().convert(value, targetType);
}
return null;
}
@Override
public Class getPropertyAsClass(String key, Class targetType) {
String value = getProperty(key);
if (value != null) {
Class clazz;
try {
clazz = ClassUtils.forName((String) value, null);
} catch (Exception ex) {
throw new WrappedException(ex);
}
return targetType.isAssignableFrom(clazz) ? (Class) clazz : null;
}
return null;
}
@Override
protected String getPropertyAsRawString(String key) {
return getProperty(key);
}
}