gov.nist.core.NameValueList Maven / Gradle / Ivy
/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
/*******************************************************************************
* Product of NIST/ITL Advanced Networking Technologies Division (ANTD). *
*******************************************************************************/
package gov.nist.core;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* Implements a simple NameValue association with a quick lookup function (via a
* hash map) the default behavior for this class is not thread safe.
* specify a constructor with boolean true to make this thread safe.
*
* @version 1.2
*
* @author M. Ranganathan
*
*
*
*/
public class NameValueList implements Serializable, Cloneable, Map {
private static final long serialVersionUID = -6998271876574260243L;
private Map hmap;
private String separator;
private boolean sync = false;
/**
* default constructor.
*/
public NameValueList() {
this.separator = Separators.SEMICOLON;
//jeand : lazy loading of the map to save on mem consumption
// this.hmap = new LinkedHashMap(0);
}
public NameValueList(boolean sync) {
this.separator = Separators.SEMICOLON;
this.sync = sync;
//jeand : lazy loading of the map to save on mem consumption
// if (sync)
// this.hmap = new ConcurrentHashMap(0);
// else
// this.hmap = new LinkedHashMap(0);
}
public void setSeparator(String separator) {
this.separator = separator;
}
/**
* Encode the list in semicolon separated form.
*
* @return an encoded string containing the objects in this list.
* @since v1.0
*/
public String encode() {
return encode(new StringBuilder()).toString();
}
public StringBuilder encode(StringBuilder buffer) {
if (!this.isEmpty()) {
Iterator iterator = this.iterator();
if (iterator.hasNext()) {
while (true) {
Object obj = iterator.next();
if (obj instanceof GenericObject) {
GenericObject gobj = (GenericObject) obj;
gobj.encode(buffer);
} else {
buffer.append(obj.toString());
}
if (iterator.hasNext())
buffer.append(separator);
else
break;
}
}
}
return buffer;
}
public String toString() {
return this.encode();
}
/**
* Set a namevalue object in this list.
*/
public void set(NameValue nv) {
this.put(nv.getName().toLowerCase(), nv);
}
/**
* Set a namevalue object in this list.
*/
public void set(String name, Object value) {
NameValue nameValue = new NameValue(name, value);
this.put(name.toLowerCase(), nameValue);
}
/**
* Compare if two NameValue lists are equal.
*
* @param otherObject
* is the object to compare to.
* @return true if the two objects compare for equality.
*/
public boolean equals(Object otherObject) {
if ( otherObject == null ) {
return false;
}
if (!otherObject.getClass().equals(this.getClass())) {
return false;
}
NameValueList other = (NameValueList) otherObject;
if (this.size() != this.size()) {
return false;
}
Iterator li = this.getNames();
while (li.hasNext()) {
String key = (String) li.next();
NameValue nv1 = this.getNameValue(key);
NameValue nv2 = (NameValue) other.get(key);
if (nv2 == null)
return false;
else if (!nv2.equals(nv1))
return false;
}
return true;
}
/**
* Do a lookup on a given name and return value associated with it.
*/
public Object getValue(String name) {
return getValue(name, true);
}
/**
* Do a lookup on a given name and return value associated with it.
*/
public Object getValue(String name, boolean stripQuotes) {
NameValue nv = this.getNameValue(name.toLowerCase());
if (nv != null)
return nv.getValueAsObject(stripQuotes);
else
return null;
}
/**
* Get the NameValue record given a name.
*
* @since 1.0
*/
public NameValue getNameValue(String name) {
if(hmap == null) {
return null;
}
return (NameValue) hmap.get(name.toLowerCase());
}
/**
* Returns a boolean telling if this NameValueList has a record with this
* name
*
* @since 1.0
*/
public boolean hasNameValue(String name) {
return this.containsKey(name.toLowerCase());
}
/**
* Remove the element corresponding to this name.
*
* @since 1.0
*/
public boolean delete(String name) {
String lcName = name.toLowerCase();
if (this.containsKey(lcName)) {
this.remove(lcName);
return true;
} else {
return false;
}
}
public Object clone() {
NameValueList retval = new NameValueList();
retval.setSeparator(this.separator);
if(hmap != null) {
Iterator it = this.iterator();
while (it.hasNext()) {
retval.set((NameValue) ((NameValue) it.next()).clone());
}
}
return retval;
}
/**
* Return the size of the embedded map
*/
public int size() {
if(hmap == null) {
return 0;
}
return hmap.size();
}
/**
* Return true if empty.
*/
public boolean isEmpty() {
if(hmap == null) {
return true;
}
return hmap.isEmpty();
}
/**
* Return an iterator for the name-value pairs of this list.
*
* @return the iterator.
*/
public Iterator iterator() {
return this.getMap().values().iterator();
}
/**
* Get a list of parameter names.
*
* @return a list iterator that has the names of the parameters.
*/
public Iterator getNames() {
return this.getMap().keySet().iterator();
}
/**
* Get the parameter as a String.
*
* @return the parameter as a string.
*/
public String getParameter(String name) {
return getParameter(name, true);
}
/**
* Get the parameter as a String.
*
* @return the parameter as a string.
*/
public String getParameter(String name, boolean stripQuotes) {
Object val = this.getValue(name, stripQuotes);
if (val == null)
return null;
if (val instanceof GenericObject)
return ((GenericObject) val).encode();
else
return val.toString();
}
/*
* (non-Javadoc)
* @see java.util.Map#clear()
*/
public void clear() {
if(hmap != null) {
hmap.clear();
}
}
/*
* (non-Javadoc)
* @see java.util.Map#containsKey(java.lang.Object)
*/
public boolean containsKey(Object key) {
if(hmap == null) {
return false;
}
return hmap.containsKey(key.toString().toLowerCase());
}
/*
* (non-Javadoc)
* @see java.util.Map#containsValue(java.lang.Object)
*/
public boolean containsValue(Object value) {
if(hmap == null) {
return false;
}
return hmap.containsValue(value);
}
/*
* (non-Javadoc)
* @see java.util.Map#entrySet()
*/
public Set> entrySet() {
if(hmap == null) {
return new HashSet>();
}
return hmap.entrySet();
}
/*
* (non-Javadoc)
* @see java.util.Map#get(java.lang.Object)
*/
public NameValue get(Object key) {
if(hmap == null) {
return null;
}
return hmap.get(key.toString().toLowerCase());
}
/*
* (non-Javadoc)
* @see java.util.Map#keySet()
*/
public Set keySet() {
if(hmap == null) {
return new HashSet();
}
return hmap.keySet();
}
/*
* (non-Javadoc)
* @see java.util.Map#put(java.lang.Object, java.lang.Object)
*/
public NameValue put(String name, NameValue nameValue) {
return this.getMap().put(name, nameValue);
}
public void putAll(Map map) {
this.getMap().putAll(map);
}
/*
* (non-Javadoc)
* @see java.util.Map#remove(java.lang.Object)
*/
public NameValue remove(Object key) {
if(hmap == null) {
return null;
}
return this.getMap().remove(key.toString().toLowerCase());
}
/*
* (non-Javadoc)
* @see java.util.Map#values()
*/
public Collection values() {
return this.getMap().values();
}
@Override
public int hashCode() {
return this.getMap().keySet().hashCode();
}
/**
* @return the hmap
*/
protected Map getMap() {
if(this.hmap == null) {
if (sync) {
this.hmap = new ConcurrentHashMap(0);
} else {
this.hmap = new LinkedHashMap(0);
}
}
return hmap;
}
}