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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.configuration;
import java.util.HashMap;
import java.util.Map;
public class PropertyNameResolver
{
public static interface Accessor
{
Object get(String name);
}
private static Map<Class<?>,Accessor> accessors = new HashMap<Class<?>,Accessor>();
protected Map<String,QpidProperty> properties;
private static class BooleanAccessor implements Accessor
{
public Boolean get(String name)
{
return Boolean.getBoolean(name);
}
}
private static class IntegerAccessor implements Accessor
{
public Integer get(String name)
{
return Integer.getInteger(name);
}
}
private static class LongAccessor implements Accessor
{
public Long get(String name)
{
return Long.getLong(name);
}
}
private static class StringAccessor implements Accessor
{
public String get(String name)
{
return System.getProperty(name);
}
}
static
{
accessors.put(Boolean.class, new BooleanAccessor());
accessors.put(Integer.class, new IntegerAccessor());
accessors.put(String.class, new StringAccessor());
accessors.put(Long.class, new LongAccessor());
}
public Integer getIntegerValue(String propName)
{
return properties.get(propName).get(Integer.class);
}
public Long getLongValue(String propName)
{
return properties.get(propName).get(Long.class);
}
public String getStringValue(String propName)
{
return properties.get(propName).get(String.class);
}
public Boolean getBooleanValue(String propName)
{
return properties.get(propName).get(Boolean.class);
}
public <T> T get(String propName,Class<T> klass)
{
return properties.get(propName).get(klass);
}
static class QpidProperty
{
private Object defValue;
private String[] names;
QpidProperty(Object defValue, String ... names)
{
this.defValue = defValue;
this.names = names;
}
<T> T get(Class<T> klass)
{
Accessor acc = accessors.get(klass);
for (String name : names)
{
Object obj = acc.get(name);
if (obj != null)
{
return klass.cast(obj);
}
}
return klass.cast(defValue);
}
}
}
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