org.springframework.web.bind.ServletRequestParameterPropertyValues.java Source code

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Here is the source code for org.springframework.web.bind.ServletRequestParameterPropertyValues.java

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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.web.bind;

import javax.servlet.ServletRequest;

import org.springframework.beans.MutablePropertyValues;
import org.springframework.lang.Nullable;
import org.springframework.web.util.WebUtils;

/**
 * PropertyValues implementation created from parameters in a ServletRequest.
 * Can look for all property values beginning with a certain prefix and
 * prefix separator (default is "_").
 *
 * <p>For example, with a prefix of "spring", "spring_param1" and
 * "spring_param2" result in a Map with "param1" and "param2" as keys.
 *
 * <p>This class is not immutable to be able to efficiently remove property
 * values that should be ignored for binding.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @see org.springframework.web.util.WebUtils#getParametersStartingWith
 */
@SuppressWarnings("serial")
public class ServletRequestParameterPropertyValues extends MutablePropertyValues {

    /** Default prefix separator. */
    public static final String DEFAULT_PREFIX_SEPARATOR = "_";

    /**
     * Create new ServletRequestPropertyValues using no prefix
     * (and hence, no prefix separator).
     * @param request the HTTP request
     */
    public ServletRequestParameterPropertyValues(ServletRequest request) {
        this(request, null, null);
    }

    /**
     * Create new ServletRequestPropertyValues using the given prefix and
     * the default prefix separator (the underscore character "_").
     * @param request the HTTP request
     * @param prefix the prefix for parameters (the full prefix will
     * consist of this plus the separator)
     * @see #DEFAULT_PREFIX_SEPARATOR
     */
    public ServletRequestParameterPropertyValues(ServletRequest request, @Nullable String prefix) {
        this(request, prefix, DEFAULT_PREFIX_SEPARATOR);
    }

    /**
     * Create new ServletRequestPropertyValues supplying both prefix and
     * prefix separator.
     * @param request the HTTP request
     * @param prefix the prefix for parameters (the full prefix will
     * consist of this plus the separator)
     * @param prefixSeparator separator delimiting prefix (e.g. "spring")
     * and the rest of the parameter name ("param1", "param2")
     */
    public ServletRequestParameterPropertyValues(ServletRequest request, @Nullable String prefix,
            @Nullable String prefixSeparator) {

        super(WebUtils.getParametersStartingWith(request, (prefix != null ? prefix + prefixSeparator : null)));
    }

}