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com.eva.properties.MapProperties Maven / Gradle / Ivy
Advanced properties with object factories, references and inheritance.
/*
* $Id: MapProperties.java 42 2007-02-27 21:27:41Z max $
*
* Copyright (c) 2006-2007 Maximilian Antoni. All rights reserved.
*
* This software is licensed as described in the file LICENSE.txt, which you
* should have received as part of this distribution. The terms are also
* available at http://www.maxantoni.de/projects/eva-properties/license.txt.
*/
package com.eva.properties;
import java.io.IOException;
import java.io.StringReader;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
/**
* is a map based properties implementation.
*
* @author Max Antoni
* @version $Revision: 42 $
*/
class MapProperties extends Properties implements Map {
private static final String JOKER = "*";
private static final String SUPER = "super";
private static final String SYSTEM = "system";
private Map map;
MapProperties(Properties inParent) {
this(inParent, new LinkedHashMap());
}
MapProperties(Properties inParent, Map inMap) {
super(inParent);
map = inMap;
}
/*
* @see java.util.Map#clear()
*/
public void clear() {
map.clear();
}
/*
* @see java.util.Map#containsKey(java.lang.Object)
*/
public boolean containsKey(Object inKey) {
return map.containsKey(inKey);
}
/*
* @see java.util.Map#containsValue(java.lang.Object)
*/
public boolean containsValue(Object inValue) {
return map.containsValue(inValue);
}
/*
* @see java.util.Map#entrySet()
*/
public Set entrySet() {
return map.entrySet();
}
/*
* @see java.util.Map#get(java.lang.Object)
*/
public Object get(Object inKey) {
try {
return new Context(this).lookup((String) inKey);
}
catch(PropertiesException e) {
throw new PropertiesException("Cannot resolve \"" + inKey
+ "\", " + e.getMessage(), e);
}
}
/*
* @see java.util.Map#isEmpty()
*/
public boolean isEmpty() {
return map.isEmpty();
}
/*
* @see java.util.Map#keySet()
*/
public Set keySet() {
return map.keySet();
}
/*
* @see java.util.Map#put(java.lang.Object, java.lang.Object)
*/
public Object put(Object inKey, Object inValue) {
return putProperty(new Context(this), (String) inKey, inValue);
}
/*
* @see java.util.Map#putAll(java.util.Map)
*/
public void putAll(Map inMap) {
for(Iterator i = inMap.keySet().iterator(); i.hasNext();) {
Object key = i.next();
put(key, inMap.get(key));
}
}
/*
* @see java.util.Map#remove(java.lang.Object)
*/
public Object remove(Object inKey) {
String key = (String) inKey;
int p = key.lastIndexOf('.');
if(p > 0) {
String leftKey = key.substring(0, p);
String removeKey = key.substring(p + 1);
Object value = get(leftKey);
if(value instanceof Map) {
return ((Map) value).remove(removeKey);
}
throw new PropertiesException("Cannot remove " + key + ", "
+ leftKey + " is not a map.");
}
return map.remove(key);
}
/*
* @see java.util.Map#size()
*/
public int size() {
return map.size();
}
/*
* @see java.util.Map#values()
*/
public Collection values() {
return map.values();
}
boolean containsKeyInternal(String inKey) {
return map.containsKey(inKey);
}
/*
* @see com.eva.properties.Properties#copy(com.eva.properties.Properties)
*/
Properties copy(Properties inParent) {
MapProperties newProperties = new MapProperties(inParent);
for(Iterator i = map.keySet().iterator(); i.hasNext();) {
String key = (String) i.next();
Object value = map.get(key);
if(value instanceof Properties) {
newProperties.map.put(key, ((Properties) value)
.copy(newProperties));
}
else if(value instanceof Replaceable) {
newProperties.map.put(key, ((Replaceable) value)
.copy(newProperties));
}
else {
newProperties.map.put(key, value);
}
}
return newProperties;
}
Object getInternal(String inKey) {
return map.get(inKey);
}
/*
* @see com.eva.properties.AbstractProperties#getProperty(
* com.eva.properties.Context, java.lang.String)
*/
Object getProperty(Context inContext, String inKey)
throws PropertiesException {
int p = inKey.indexOf('.');
if(p > 0) {
String localKey = inKey.substring(0, p);
String rightKey = inKey.substring(p + 1);
if(localKey.equals(JOKER)) {
return createJokerMap(inContext, rightKey);
}
if(localKey.equals(SYSTEM)) {
return getSystemProperty(inContext, rightKey);
}
Object value = map.get(localKey);
if(value == null) {
return checkDelegate(inContext, inKey);
}
if(value instanceof Replaceable) {
value = inContext.replaceReplaceable((Replaceable) value);
}
if(value instanceof Properties) {
Properties inner = (Properties) value;
value = inner.getProperty(new Context(inContext, inner),
rightKey);
if(value != null) {
return value;
}
}
return checkDelegate(inContext, inKey);
}
Object value = map.get(inKey);
if(value == null) {
value = map.get(JOKER);
if(value == null) {
value = checkDelegate(inContext, inKey);
if(value == null) {
return null;
}
}
}
return inContext.replace(value);
}
void putInternal(String inKey, Object inValue) {
map.put(inKey, inValue);
}
/*
* @see com.eva.properties.Properties#putProperty(
* com.eva.properties.Context, java.lang.String, java.lang.Object)
*/
Object putProperty(Context inContext, String inKey, Object inValue) {
int p = inKey.indexOf('.');
if(p > 0) {
String left = inKey.substring(0, p);
if(left.equals(SUPER)) {
throw new PropertiesException("Illegal key \"" + SUPER + "\".");
}
String right = inKey.substring(p + 1);
Object value = map.get(left);
if(value == null) {
p = right.indexOf('.');
String index = p > 0 ? right.substring(p + 1) : right;
try {
Integer.parseInt(index);
value = new ListProperties(this);
}
catch(NumberFormatException e) {
value = new MapProperties(this);
}
map.put(left, value);
}
else if(value instanceof Replaceable) {
value = inContext.replaceReplaceable((Replaceable) value);
}
if(value instanceof Properties) {
Properties inner = (Properties) value;
return inner.putProperty(new Context(inContext, inner),
right, inValue);
}
throw new PropertiesException("Cannot put " + inKey + ", " + left
+ " is not a list or a map.");
}
if(inKey.equals(SUPER)) {
if(!(inValue instanceof String) && !(inValue instanceof Reference)
&& !(inValue instanceof Proxy)
&& !(inValue instanceof Properties)) {
throw new PropertiesException("Value for " + SUPER
+ " must be either null, a path, a reference, "
+ "a proxy or a map.");
}
}
else if(inValue instanceof Properties) {
((Properties) inValue).setParent(this);
}
return map.put(inKey, inValue);
}
/*
* @see com.eva.properties.Properties#write(com.eva.properties.Writer)
*/
void write(Writer inoutWriter) {
inoutWriter.append("{\n");
inoutWriter.increaseIndentation();
for(Iterator i = map.keySet().iterator(); i.hasNext();) {
inoutWriter.appendIndentation();
String key = (String) i.next();
inoutWriter.append(key);
inoutWriter.append(": ");
inoutWriter.write(map.get(key));
}
inoutWriter.decreaseIndentation();
inoutWriter.appendIndentation();
inoutWriter.append("}\n");
}
private Object checkDelegate(Context inContext, String inKey)
throws PropertiesException {
Object superValue = map.get(SUPER);
if(superValue == null) {
return null;
}
Properties delegate = getDelegate(inContext, superValue);
return delegate.getProperty(inContext, inKey);
}
private Object createJokerMap(Context inContext, String inRightKey)
throws PropertiesException {
MapProperties properties = new MapProperties(getParent());
for(Iterator i = map.keySet().iterator(); i.hasNext();) {
String key = (String) i.next();
Object value = map.get(key);
if(value instanceof Properties) {
value = ((Properties) value).getProperty(inContext,
inRightKey);
if(value != null) {
properties.putInternal(key, value);
}
}
}
return properties;
}
private Properties getDelegate(Context inContext, Object inSuperValue)
throws PropertiesException {
if(inSuperValue instanceof Reference) {
String reference = ((Reference) inSuperValue).getReference();
Properties delegate = (Properties) inContext.getParent().lookup(
reference);
if(delegate == null) {
throw new PropertiesException("Invalid super reference, \""
+ reference + "\" is null.");
}
return delegate;
}
if(inSuperValue instanceof Proxy) {
return (Properties) ((Proxy) inSuperValue).replace(inContext);
}
if(inSuperValue instanceof Properties) {
return (Properties) inSuperValue;
}
if(SYSTEM.equals(inSuperValue)) {
return SystemProperties.INSTANCE;
}
throw new PropertiesException("Invalid super " + inSuperValue + ".");
}
private Object getSystemProperty(Context inContext, String inProperty) {
String systemProperty = System.getProperty(inProperty);
if(systemProperty == null) {
return null;
}
Object value;
try {
value = PropertiesParser.readObject(
new StringReader(systemProperty), false);
}
catch(PropertiesException e) {
// Cannot be parsed
value = systemProperty;
}
catch(IOException e) {
throw new PropertiesException(e.getMessage());
}
if(value instanceof String) {
return inContext.replaceString((String) value);
}
if(value instanceof Replaceable) {
return inContext.replaceReplaceable((Replaceable) value);
}
return value;
}
}
