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/*-
* ============LICENSE_START=======================================================
* openECOMP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.InvalidPropertiesFormatException;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
/**
* This utility class is used to wrap a properties object and to delegate all read operations to the property object,
* while disallowing any write or modification to the property object.
*
*/
public class UnmodifiableProperties extends Properties implements Cloneable {
/**
* Serial number
*/
private static final long serialVersionUID = 1L;
private static final String PROPERTY_CANNOT_BE_MODIFIED_MSG = "Property cannot be modified!";
/**
* The properties object which we are wrapping
*/
private Properties properties;
/**
* Create the unmodifiable wrapper around the provided properties object
*
* @param properties
* The properties to be wrapped and protected from modification
*/
public UnmodifiableProperties(Properties properties) {
this.properties = properties;
}
/**
* @see java.util.Hashtable#clear()
*/
@Override
public synchronized void clear() {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Hashtable#clone()
*/
// @sonar:off
@Override
public synchronized Object clone() {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
// @sonar:on
/**
* @see java.util.Hashtable#contains(java.lang.Object)
*/
@Override
public synchronized boolean contains(Object value) {
return properties.contains(value);
}
/**
* @see java.util.Hashtable#containsKey(java.lang.Object)
*/
@Override
public synchronized boolean containsKey(Object key) {
return properties.containsKey(key);
}
/**
* @see java.util.Hashtable#containsValue(java.lang.Object)
*/
@Override
public boolean containsValue(Object value) {
return properties.containsValue(value);
}
/**
* @see java.util.Hashtable#elements()
*/
@Override
public synchronized Enumeration<Object> elements() {
return properties.elements();
}
/**
* @see java.util.Hashtable#entrySet()
*/
@Override
public Set<java.util.Map.Entry<Object, Object>> entrySet() {
return Collections.unmodifiableSet(properties.entrySet());
}
/**
* @see java.util.Hashtable#equals(java.lang.Object)
*/
@Override
public synchronized boolean equals(Object o) {
return properties.equals(o);
}
/**
* @see java.util.Hashtable#get(java.lang.Object)
*/
@Override
public synchronized Object get(Object key) {
return properties.get(key);
}
/**
* @see java.util.Properties#getProperty(java.lang.String)
*/
@Override
public String getProperty(String key) {
return properties.getProperty(key);
}
/**
* @see java.util.Properties#getProperty(java.lang.String, java.lang.String)
*/
@Override
public String getProperty(String key, String defaultValue) {
return properties.getProperty(key, defaultValue);
}
/**
* @see java.util.Hashtable#hashCode()
*/
@Override
public synchronized int hashCode() {
return properties.hashCode();
}
/**
* @see java.util.Hashtable#isEmpty()
*/
@Override
public synchronized boolean isEmpty() {
return properties.isEmpty();
}
/**
* @see java.util.Hashtable#keys()
*/
@Override
public synchronized Enumeration<Object> keys() {
return properties.keys();
}
/**
* @see java.util.Hashtable#keySet()
*/
@Override
public Set<Object> keySet() {
return Collections.unmodifiableSet(properties.keySet());
}
/**
* @see java.util.Properties#list(java.io.PrintStream)
*/
@Override
public void list(PrintStream out) {
properties.list(out);
}
/**
* @see java.util.Properties#list(java.io.PrintWriter)
*/
@Override
public void list(PrintWriter out) {
properties.list(out);
}
/**
* @see java.util.Properties#load(java.io.InputStream)
*/
@Override
public synchronized void load(InputStream inStream) throws IOException {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Properties#load(java.io.Reader)
*/
@Override
public synchronized void load(Reader reader) throws IOException {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Properties#loadFromXML(java.io.InputStream)
*/
@Override
public synchronized void loadFromXML(InputStream in) throws IOException, InvalidPropertiesFormatException {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Properties#propertyNames()
*/
@Override
public Enumeration<?> propertyNames() {
return properties.propertyNames();
}
/**
* @see java.util.Hashtable#put(java.lang.Object, java.lang.Object)
*/
@Override
public synchronized Object put(Object key, Object value) {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Hashtable#putAll(java.util.Map)
*/
@Override
public synchronized void putAll(Map<? extends Object, ? extends Object> t) {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Hashtable#rehash()
*/
@Override
protected void rehash() {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Hashtable#remove(java.lang.Object)
*/
@Override
public synchronized Object remove(Object key) {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Properties#save(java.io.OutputStream, java.lang.String)
*/
@Override
@Deprecated
public synchronized void save(OutputStream out, String comments) {
properties.save(out, comments);
}
/**
* @see java.util.Properties#setProperty(java.lang.String, java.lang.String)
*/
@Override
public synchronized Object setProperty(String key, String value) {
throw new UnsupportedOperationException(PROPERTY_CANNOT_BE_MODIFIED_MSG);
}
/**
* @see java.util.Hashtable#size()
*/
@Override
public synchronized int size() {
return properties.size();
}
/**
* @see java.util.Properties#store(java.io.OutputStream, java.lang.String)
*/
@Override
public void store(OutputStream out, String comments) throws IOException {
properties.store(out, comments);
}
/**
* @see java.util.Properties#store(java.io.Writer, java.lang.String)
*/
@Override
public void store(Writer writer, String comments) throws IOException {
properties.store(writer, comments);
}
/**
* @see java.util.Properties#storeToXML(java.io.OutputStream, java.lang.String)
*/
@Override
public synchronized void storeToXML(OutputStream os, String comment) throws IOException {
properties.storeToXML(os, comment);
}
/**
* @see java.util.Properties#storeToXML(java.io.OutputStream, java.lang.String, java.lang.String)
*/
@Override
public synchronized void storeToXML(OutputStream os, String comment, String encoding) throws IOException {
properties.storeToXML(os, comment, encoding);
}
/**
* @see java.util.Properties#stringPropertyNames()
*/
@Override
public Set<String> stringPropertyNames() {
return properties.stringPropertyNames();
}
/**
* @see java.util.Hashtable#toString()
*/
@Override
public synchronized String toString() {
return properties.toString();
}
/**
* @see java.util.Hashtable#values()
*/
@Override
public Collection<Object> values() {
return Collections.unmodifiableCollection(properties.values());
}
}
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