spring SingleCharWildcardedPathElement 源码

spring SingleCharWildcardedPathElement 代码

文件路径：/spring-web/src/main/java/org/springframework/web/util/pattern/SingleCharWildcardedPathElement.java

/*
 * Copyright 2002-2021 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.util.pattern;

import org.springframework.http.server.PathContainer.Element;
import org.springframework.http.server.PathContainer.PathSegment;
import org.springframework.web.util.pattern.PathPattern.MatchingContext;

/**
 * A literal path element that includes the single character wildcard '?' one
 * or more times (to basically many any character at that position).
 *
 * @author Andy Clement
 * @since 5.0
 */
class SingleCharWildcardedPathElement extends PathElement {

	private final char[] text;

	private final int len;

	private final int questionMarkCount;

	private final boolean caseSensitive;


	public SingleCharWildcardedPathElement(
			int pos, char[] literalText, int questionMarkCount, boolean caseSensitive, char separator) {

		super(pos, separator);
		this.len = literalText.length;
		this.questionMarkCount = questionMarkCount;
		this.caseSensitive = caseSensitive;
		if (caseSensitive) {
			this.text = literalText;
		}
		else {
			this.text = new char[literalText.length];
			for (int i = 0; i < this.len; i++) {
				this.text[i] = Character.toLowerCase(literalText[i]);
			}
		}
	}


	@Override
	public boolean matches(int pathIndex, MatchingContext matchingContext) {
		if (pathIndex >= matchingContext.pathLength) {
			// no more path left to match this element
			return false;
		}

		Element element = matchingContext.pathElements.get(pathIndex);
		if (!(element instanceof PathSegment)) {
			return false;
		}
		String value = ((PathSegment)element).valueToMatch();
		if (value.length() != this.len) {
			// Not enough data to match this path element
			return false;
		}

		if (this.caseSensitive) {
			for (int i = 0; i < this.len; i++) {
				char ch = this.text[i];
				if ((ch != '?') && (ch != value.charAt((i)))) {
					return false;
				}
			}
		}
		else {
			for (int i = 0; i < this.len; i++) {
				char ch = this.text[i];
				// TODO revisit performance if doing a lot of case insensitive matching
				if ((ch != '?') && (ch != Character.toLowerCase(value.charAt(i)))) {
					return false;
				}
			}
		}

		pathIndex++;
		if (isNoMorePattern()) {
			if (matchingContext.determineRemainingPath) {
				matchingContext.remainingPathIndex = pathIndex;
				return true;
			}
			else {
				if (pathIndex == matchingContext.pathLength) {
					return true;
				}
				else {
					return (matchingContext.isMatchOptionalTrailingSeparator() &&
							(pathIndex + 1) == matchingContext.pathLength &&
							matchingContext.isSeparator(pathIndex));
				}
			}
		}
		else {
			return (this.next != null && this.next.matches(pathIndex, matchingContext));
		}
	}

	@Override
	public int getWildcardCount() {
		return this.questionMarkCount;
	}

	@Override
	public int getNormalizedLength() {
		return this.len;
	}

	@Override
	public char[] getChars() {
		return this.text;
	}


	@Override
	public String toString() {
		return "SingleCharWildcarded(" + String.valueOf(this.text) + ")";
	}

}

相关信息

spring 源码目录

相关文章

spring CaptureTheRestPathElement 源码

spring CaptureVariablePathElement 源码

spring InternalPathPatternParser 源码

spring LiteralPathElement 源码

spring PathElement 源码

spring PathPattern 源码

spring PathPatternParser 源码

spring PathPatternRouteMatcher 源码

spring PatternParseException 源码

spring RegexPathElement 源码