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package org.apache.qpid.configuration;
/*
*
* 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.
*
*/
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;
public interface Accessor
{
public Boolean getBoolean(String name);
public Integer getInt(String name);
public Long getLong(String name);
public String getString(String name);
static class SystemPropertyAccessor implements Accessor
{
public Boolean getBoolean(String name)
{
return Boolean.getBoolean(name);
}
public Integer getInt(String name)
{
return Integer.getInteger(name);
}
public Long getLong(String name)
{
return Long.getLong(name);
}
public String getString(String name)
{
return System.getProperty(name);
}
}
static class MapAccessor implements Accessor
{
protected Map<Object,Object> source;
public MapAccessor(Map<Object,Object> map)
{
source = map;
}
public Boolean getBoolean(String name)
{
if (source != null && source.containsKey(name))
{
if (source.get(name) instanceof Boolean)
{
return (Boolean)source.get(name);
}
else
{
return Boolean.parseBoolean((String)source.get(name));
}
}
else
{
return null;
}
}
public Integer getInt(String name)
{
if (source != null && source.containsKey(name))
{
if (source.get(name) instanceof Integer)
{
return (Integer)source.get(name);
}
else
{
return Integer.parseInt((String)source.get(name));
}
}
else
{
return null;
}
}
public Long getLong(String name)
{
if (source != null && source.containsKey(name))
{
if (source.get(name) instanceof Long)
{
return (Long)source.get(name);
}
else
{
return Long.parseLong((String)source.get(name));
}
}
else
{
return null;
}
}
public String getString(String name)
{
if (source != null && source.containsKey(name))
{
if (source.get(name) instanceof String)
{
return (String)source.get(name);
}
else
{
return String.valueOf(source.get(name));
}
}
else
{
return null;
}
}
}
static class PropertyFileAccessor extends MapAccessor
{
public PropertyFileAccessor(String fileName) throws FileNotFoundException, IOException
{
super(null);
Properties props = new Properties();
FileInputStream inStream = new FileInputStream(fileName);
try
{
props.load(inStream);
}
finally
{
inStream.close();
}
source = props;
}
}
static class CombinedAccessor implements Accessor
{
private List<Accessor> accessors;
public CombinedAccessor(Accessor...accessors)
{
this.accessors = Arrays.asList(accessors);
}
public Boolean getBoolean(String name)
{
for (Accessor accessor: accessors)
{
if (accessor.getBoolean(name) != null)
{
return accessor.getBoolean(name);
}
}
return null;
}
public Integer getInt(String name)
{
for (Accessor accessor: accessors)
{
if (accessor.getBoolean(name) != null)
{
return accessor.getInt(name);
}
}
return null;
}
public Long getLong(String name)
{
for (Accessor accessor: accessors)
{
if (accessor.getBoolean(name) != null)
{
return accessor.getLong(name);
}
}
return null;
}
public String getString(String name)
{
for (Accessor accessor: accessors)
{
if (accessor.getBoolean(name) != null)
{
return accessor.getString(name);
}
}
return null;
}
}
static class ValidationAccessor implements Accessor
{
private List<Validator> validators;
private Accessor delegate;
public ValidationAccessor(Accessor delegate,Validator...validators)
{
this.validators = Arrays.asList(validators);
this.delegate = delegate;
}
public Boolean getBoolean(String name)
{
// there is nothing to validate in a boolean
return delegate.getBoolean(name);
}
public Integer getInt(String name)
{
Integer v = delegate.getInt(name);
for (Validator validator: validators)
{
validator.validate(v);
}
return v;
}
public Long getLong(String name)
{
Long v = delegate.getLong(name);
for (Validator validator: validators)
{
validator.validate(v);
}
return v;
}
public String getString(String name)
{
String v = delegate.getString(name);
for (Validator validator: validators)
{
validator.validate(v);
}
return v;
}
}
}
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