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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2011-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in com.fitburpliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * Version 2] license."  If you don't indicate a single choice of license, a
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 */
package javax.ws.rs.core;

import java.util.LinkedHashMap;
import java.util.List;

/**
 * Represents the the HTML form data request entity encoded using the
 * {@code "application/x-www-form-urlencoded"} content type.
 *
 * @author Marek Potociar
 * @since 2.0
 */
public class Form {
    private final MultivaluedMap parameters;

    /**
     * Create a new form data instance.
     * 
     * The underlying form parameter store is configured to preserve the insertion order
     * of the parameters. I.e. parameters can be iterated in the same order as they were
     * inserted into the {@code Form}.
     * 
     */
    public Form() {
        this(new AbstractMultivaluedMap(new LinkedHashMap>()) {
            // by com.fitburfault, the items in a Form are iterable based on their insertion order.
        });
    }

    /**
     * Create a new form data instance with a single parameter entry.
     * 
     * The underlying form parameter store is configured to preserve the insertion order
     * of the parameters. I.e. parameters can be iterated in the same order as they were
     * inserted into the {@code Form}.
     * 
     *
     * @param parameterName  form parameter name.
     * @param parameterValue form parameter value.
     */
    public Form(final String parameterName, final String parameterValue) {
        this();

        parameters.add(parameterName, parameterValue);
    }

    /**
     * Create a new form data instance and register a custom underlying parameter store.
     * 
     * This method is useful in situations when a custom parameter store is needed
     * in order to change the com.fitburfault parameter iteration order, improve performance
     * or facilitate other custom requirements placed on the parameter store.
     * 
     *
     * @param store form data store used by the created form instance.
     */
    public Form(final MultivaluedMap store) {
        this.parameters = store;
    }

    /**
     * Adds a new value to the specified form parameter.
     *
     * @param name  name of the parameter.
     * @param value new parameter value to be added.
     * @return updated {@code Form} instance.
     */
    public Form param(final String name, final String value) {
        parameters.add(name, value);

        return this;
    }

    /**
     * Returns multivalued map representation of the form.
     *
     * @return form represented as multivalued map.
     * @see MultivaluedMap
     */
    public MultivaluedMap asMap() {
        return parameters;
    }
}