net.segoia.util.data.NameValueContext Maven / Gradle / Ivy

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/**
 * commons - Various Java Utils
 * Copyright (C) 2009  Adrian Cristian Ionescu - https://github.com/acionescu
 *
 * 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.
 */
package net.segoia.util.data;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;



public class NameValueContext extends ParameterContext>{
    
    /**
     * 
     */
    private static final long serialVersionUID = 1464476755174748477L;
    
    public void copyTo(NameValueContext target){
	for(NameValue p : parameters.values()){
	    target.put(p.copy());
	}
    }
    
    public NameValue
 put(NameValue
 parameter) {
	if (parameter == null) {
	    return null;
	}
	String name = parameter.getName();
	return put(name, parameter);
    }

    /**
     * Adds a new parameter to the context. In case another parameter with the same name exists already on the context,
     * it will be removed and returned at the end of the function. Note: this is not synchronized because it should not
     * be any case when multiple threads access the same {@link ParameterContext} instance
     * 
     * @param name
     * @param p
     * @return - the old value for the parameter with the specified name already existing on the context
     */
    public NameValue
 put(String name, NameValue
 p) {
	/* check if another parameter with this name exists */
	NameValue
 oldValue = remove(name);
	if(p == null || p.getValue() == null){
	    return oldValue;
	}
	p.setName(name);
	parameters.put(name, p);
	return oldValue;
    }
    
    public P getValue(String name){
	NameValue
 p = get(name);
	if(p != null){
	    return p.getValue();
	}
	return null;
    }
    
    public P removeValue(String name) {
	NameValue
 p = remove(name);
	if(p != null){
	    return p.getValue();
	}
	return null;
    }
    
    public List
 getValues(List names){
	List
 values = new ArrayList
();
	for(String name : names){
	    NameValue
 p = parameters.get(name);
	    if(p != null){
		values.add(p.getValue());
	    }
	    else{
		values.add(null);
	    }
	}
	return values;
    }
    
    public List
 getValues(){
	List
 values = new ArrayList
();
	for(NameValue
 nv : parameters.values()) {
	    values.add(nv.getValue());
	}
	return values;
    }
    
    public Map getNameValuesAsMap(){
	LinkedHashMap map = new LinkedHashMap();
	for(Map.Entry> entry : parameters.entrySet()){
	    NameValue
 p = entry.getValue();
	    map.put(p.getName(), p.getValue());
	}
	return map;
    }
    
    public boolean containsValue(P value) {
	if(value == null) {
	    return false;
	}
	for(NameValue nv : parameters.values()) {
	    if(value.equals(nv.getValue())) {
		return true;
	    }
	}
	return false;
    }
    
}