Arjen Poutsma
13 years ago
5 changed files with 212 additions and 156 deletions
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/* |
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* Copyright 2002-2011 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.web.util; |
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/** |
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* Enumeration used to identify the parts of a URI. |
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* |
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* <p>Contains methods to indicate whether a given character is valid in a specific URI component. |
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* |
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* @author Arjen Poutsma |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986</a> |
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* @since 3.1 |
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*/ |
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public enum UriComponent { |
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SCHEME { |
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@Override |
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public boolean isAllowed(int c) { |
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return isAlpha(c) || isDigit(c) || '+' == c || '-' == c || '.' == c; |
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} |
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}, |
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AUTHORITY { |
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@Override |
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public boolean isAllowed(int c) { |
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return isUnreserved(c) || isSubDelimiter(c) || ':' == c || '@' == c; |
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} |
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}, |
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USER_INFO { |
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@Override |
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public boolean isAllowed(int c) { |
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return isUnreserved(c) || isSubDelimiter(c) || ':' == c; |
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} |
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}, |
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HOST { |
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@Override |
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public boolean isAllowed(int c) { |
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return isUnreserved(c) || isSubDelimiter(c); |
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} |
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}, |
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PORT { |
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@Override |
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public boolean isAllowed(int c) { |
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return isDigit(c); |
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} |
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}, |
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PATH { |
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@Override |
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public boolean isAllowed(int c) { |
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return isPchar(c) || '/' == c; |
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} |
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}, |
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PATH_SEGMENT { |
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@Override |
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public boolean isAllowed(int c) { |
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return isPchar(c); |
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} |
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}, |
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QUERY { |
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@Override |
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public boolean isAllowed(int c) { |
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return isPchar(c) || '/' == c || '?' == c; |
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} |
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}, |
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QUERY_PARAM { |
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@Override |
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public boolean isAllowed(int c) { |
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if ('=' == c || '+' == c || '&' == c) { |
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return false; |
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} |
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else { |
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return isPchar(c) || '/' == c || '?' == c; |
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} |
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} |
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}, |
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FRAGMENT { |
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@Override |
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public boolean isAllowed(int c) { |
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return isPchar(c) || '/' == c || '?' == c; |
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} |
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}; |
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/** |
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* Indicates whether the given character is allowed in this URI component. |
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* |
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* @param c the character |
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* @return {@code true} if the character is allowed; {@code false} otherwise |
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*/ |
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public abstract boolean isAllowed(int c); |
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/** |
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* Indicates whether the given character is in the {@code ALPHA} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isAlpha(int c) { |
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return c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'; |
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} |
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/** |
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* Indicates whether the given character is in the {@code DIGIT} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isDigit(int c) { |
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return c >= '0' && c <= '9'; |
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} |
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/** |
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* Indicates whether the given character is in the {@code gen-delims} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isGenericDelimiter(int c) { |
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return ':' == c || '/' == c || '?' == c || '#' == c || '[' == c || ']' == c || '@' == c; |
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} |
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/** |
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* Indicates whether the given character is in the {@code sub-delims} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isSubDelimiter(int c) { |
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return '!' == c || '$' == c || '&' == c || '\'' == c || '(' == c || ')' == c || '*' == c || '+' == c || |
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',' == c || ';' == c || '=' == c; |
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} |
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/** |
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* Indicates whether the given character is in the {@code reserved} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isReserved(char c) { |
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return isGenericDelimiter(c) || isReserved(c); |
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} |
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/** |
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* Indicates whether the given character is in the {@code unreserved} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isUnreserved(int c) { |
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return isAlpha(c) || isDigit(c) || '-' == c || '.' == c || '_' == c || '~' == c; |
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} |
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/** |
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* Indicates whether the given character is in the {@code pchar} set. |
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* |
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* @see <a href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986, appendix A</a> |
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*/ |
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protected boolean isPchar(int c) { |
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return isUnreserved(c) || isSubDelimiter(c) || ':' == c || '@' == c; |
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} |
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} |
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