/*
* 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.commons.configuration;
import java.io.Reader;
import java.io.Writer;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import org.apache.commons.configuration.event.ConfigurationErrorListener;
import org.apache.commons.configuration.event.ConfigurationListener;
import org.apache.commons.configuration.tree.ConfigurationNode;
import org.apache.commons.configuration.tree.ExpressionEngine;
/**
* Wraps a HierarchicalConfiguration and allows subtrees to be access via a configured path with
* replaceable tokens derived from the ConfigurationInterpolator. When used with injection frameworks
* such as Spring it allows components to be injected with subtrees of the configuration.
* @since 1.6
* @author <a
* href="http://commons.apache.org/configuration/team-list.html">Commons
* Configuration team</a>
* @version $Id: PatternSubtreeConfigurationWrapper.java 823891 2009-10-10 17:17:44Z rgoers $
*/
public class PatternSubtreeConfigurationWrapper extends AbstractHierarchicalFileConfiguration
{
/**
* Prevent recursion while resolving unprefixed properties.
*/
private static ThreadLocal recursive = new ThreadLocal()
{
protected synchronized Object initialValue()
{
return Boolean.FALSE;
}
};
/** The wrapped configuration */
private final AbstractHierarchicalFileConfiguration config;
/** The path to the subtree */
private final String path;
/** True if the path ends with '/', false otherwise */
private final boolean trailing;
/** True if the constructor has finished */
private boolean init;
/**
* Constructor
* @param config The Configuration to be wrapped.
* @param path The base path pattern.
*/
public PatternSubtreeConfigurationWrapper(AbstractHierarchicalFileConfiguration config, String path)
{
this.config = config;
this.path = path;
this.trailing = path.endsWith("/");
this.init = true;
}
public Object getReloadLock()
{
return config.getReloadLock();
}
public void addProperty(String key, Object value)
{
config.addProperty(makePath(key), value);
}
public void clear()
{
getConfig().clear();
}
public void clearProperty(String key)
{
config.clearProperty(makePath(key));
}
public boolean containsKey(String key)
{
return config.containsKey(makePath(key));
}
public BigDecimal getBigDecimal(String key, BigDecimal defaultValue)
{
return config.getBigDecimal(makePath(key), defaultValue);
}
public BigDecimal getBigDecimal(String key)
{
return config.getBigDecimal(makePath(key));
}
public BigInteger getBigInteger(String key, BigInteger defaultValue)
{
return config.getBigInteger(makePath(key), defaultValue);
}
public BigInteger getBigInteger(String key)
{
return config.getBigInteger(makePath(key));
}
public boolean getBoolean(String key, boolean defaultValue)
{
return config.getBoolean(makePath(key), defaultValue);
}
public Boolean getBoolean(String key, Boolean defaultValue)
{
return config.getBoolean(makePath(key), defaultValue);
}
public boolean getBoolean(String key)
{
return config.getBoolean(makePath(key));
}
public byte getByte(String key, byte defaultValue)
{
return config.getByte(makePath(key), defaultValue);
}
public Byte getByte(String key, Byte defaultValue)
{
return config.getByte(makePath(key), defaultValue);
}
public byte getByte(String key)
{
return config.getByte(makePath(key));
}
public double getDouble(String key, double defaultValue)
{
return config.getDouble(makePath(key), defaultValue);
}
public Double getDouble(String key, Double defaultValue)
{
return config.getDouble(makePath(key), defaultValue);
}
public double getDouble(String key)
{
return config.getDouble(makePath(key));
}
public float getFloat(String key, float defaultValue)
{
return config.getFloat(makePath(key), defaultValue);
}
public Float getFloat(String key, Float defaultValue)
{
return config.getFloat(makePath(key), defaultValue);
}
public float getFloat(String key)
{
return config.getFloat(makePath(key));
}
public int getInt(String key, int defaultValue)
{
return config.getInt(makePath(key), defaultValue);
}
public int getInt(String key)
{
return config.getInt(makePath(key));
}
public Integer getInteger(String key, Integer defaultValue)
{
return config.getInteger(makePath(key), defaultValue);
}
public Iterator getKeys()
{
return config.getKeys(makePath());
}
public Iterator getKeys(String prefix)
{
return config.getKeys(makePath(prefix));
}
public List getList(String key, List defaultValue)
{
return config.getList(makePath(key), defaultValue);
}
public List getList(String key)
{
return config.getList(makePath(key));
}
public long getLong(String key, long defaultValue)
{
return config.getLong(makePath(key), defaultValue);
}
public Long getLong(String key, Long defaultValue)
{
return config.getLong(makePath(key), defaultValue);
}
public long getLong(String key)
{
return config.getLong(makePath(key));
}
public Properties getProperties(String key)
{
return config.getProperties(makePath(key));
}
public Object getProperty(String key)
{
return config.getProperty(makePath(key));
}
public short getShort(String key, short defaultValue)
{
return config.getShort(makePath(key), defaultValue);
}
public Short getShort(String key, Short defaultValue)
{
return config.getShort(makePath(key), defaultValue);
}
public short getShort(String key)
{
return config.getShort(makePath(key));
}
public String getString(String key, String defaultValue)
{
return config.getString(makePath(key), defaultValue);
}
public String getString(String key)
{
return config.getString(makePath(key));
}
public String[] getStringArray(String key)
{
return config.getStringArray(makePath(key));
}
public boolean isEmpty()
{
return getConfig().isEmpty();
}
public void setProperty(String key, Object value)
{
getConfig().setProperty(key, value);
}
public Configuration subset(String prefix)
{
return getConfig().subset(prefix);
}
public Node getRoot()
{
return getConfig().getRoot();
}
public void setRoot(Node node)
{
if (init)
{
getConfig().setRoot(node);
}
else
{
super.setRoot(node);
}
}
public ConfigurationNode getRootNode()
{
return getConfig().getRootNode();
}
public void setRootNode(ConfigurationNode rootNode)
{
if (init)
{
getConfig().setRootNode(rootNode);
}
else
{
super.setRootNode(rootNode);
}
}
public ExpressionEngine getExpressionEngine()
{
return config.getExpressionEngine();
}
public void setExpressionEngine(ExpressionEngine expressionEngine)
{
if (init)
{
config.setExpressionEngine(expressionEngine);
}
else
{
super.setExpressionEngine(expressionEngine);
}
}
public void addNodes(String key, Collection nodes)
{
getConfig().addNodes(key, nodes);
}
public SubnodeConfiguration configurationAt(String key, boolean supportUpdates)
{
return config.configurationAt(makePath(key), supportUpdates);
}
public SubnodeConfiguration configurationAt(String key)
{
return config.configurationAt(makePath(key));
}
public List configurationsAt(String key)
{
return config.configurationsAt(makePath(key));
}
public void clearTree(String key)
{
config.clearTree(makePath(key));
}
public int getMaxIndex(String key)
{
return config.getMaxIndex(makePath(key));
}
public Configuration interpolatedConfiguration()
{
return getConfig().interpolatedConfiguration();
}
public void addConfigurationListener(ConfigurationListener l)
{
getConfig().addConfigurationListener(l);
}
public boolean removeConfigurationListener(ConfigurationListener l)
{
return getConfig().removeConfigurationListener(l);
}
public Collection getConfigurationListeners()
{
return getConfig().getConfigurationListeners();
}
public void clearConfigurationListeners()
{
getConfig().clearConfigurationListeners();
}
public void addErrorListener(ConfigurationErrorListener l)
{
getConfig().addErrorListener(l);
}
public boolean removeErrorListener(ConfigurationErrorListener l)
{
return getConfig().removeErrorListener(l);
}
public void clearErrorListeners()
{
getConfig().clearErrorListeners();
}
public void save(Writer writer) throws ConfigurationException
{
config.save(writer);
}
public void load(Reader reader) throws ConfigurationException
{
config.load(reader);
}
public Collection getErrorListeners()
{
return getConfig().getErrorListeners();
}
protected Object resolveContainerStore(String key)
{
if (((Boolean) recursive.get()).booleanValue())
{
return null;
}
recursive.set(Boolean.TRUE);
try
{
return super.resolveContainerStore(key);
}
finally
{
recursive.set(Boolean.FALSE);
}
}
private HierarchicalConfiguration getConfig()
{
return config.configurationAt(makePath());
}
private String makePath()
{
String pathPattern = trailing ? path.substring(0, path.length() - 1) : path;
return getSubstitutor().replace(pathPattern);
}
/*
* Resolve the root expression and then add the item being retrieved. Insert a
* separator character as required.
*/
private String makePath(String item)
{
String pathPattern;
if ((item.length() == 0 || item.startsWith("/")) && trailing)
{
pathPattern = path.substring(0, path.length() - 1);
}
else if (!item.startsWith("/") || !trailing)
{
pathPattern = path + "/";
}
else
{
pathPattern = path;
}
return getSubstitutor().replace(pathPattern) + item;
}
}
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