25
26 package com.sun.activation.registries;
27
28 /**
29 * A tokenizer for strings in the form of "foo/bar; prop1=val1; ... ".
30 * Useful for parsing MIME content types.
31 */
32 public class MailcapTokenizer {
33
34 public static final int UNKNOWN_TOKEN = 0;
35 public static final int START_TOKEN = 1;
36 public static final int STRING_TOKEN = 2;
37 public static final int EOI_TOKEN = 5;
38 public static final int SLASH_TOKEN = '/';
39 public static final int SEMICOLON_TOKEN = ';';
40 public static final int EQUALS_TOKEN = '=';
41
42 /**
43 * Constructor
44 *
45 * @parameter inputString the string to tokenize
46 */
47 public MailcapTokenizer(String inputString) {
48 data = inputString;
49 dataIndex = 0;
50 dataLength = inputString.length();
51
52 currentToken = START_TOKEN;
53 currentTokenValue = "";
54
55 isAutoquoting = false;
56 autoquoteChar = ';';
57 }
58
59 /**
60 * Set whether auto-quoting is on or off.
61 *
62 * Auto-quoting means that all characters after the first
63 * non-whitespace, non-control character up to the auto-quote
64 * terminator character or EOI (minus any whitespace immediatley
65 * preceeding it) is considered a token.
66 *
67 * This is required for handling command strings in a mailcap entry.
68 */
69 public void setIsAutoquoting(boolean value) {
70 isAutoquoting = value;
71 }
72
73 /**
74 * Retrieve current token.
75 *
76 * @returns The current token value
77 */
78 public int getCurrentToken() {
79 return currentToken;
80 }
81
82 /*
83 * Get a String that describes the given token.
84 */
85 public static String nameForToken(int token) {
86 String name = "really unknown";
87
88 switch(token) {
89 case UNKNOWN_TOKEN:
90 name = "unknown";
91 break;
92 case START_TOKEN:
93 name = "start";
94 break;
95 case STRING_TOKEN:
96 name = "string";
98 case EOI_TOKEN:
99 name = "EOI";
100 break;
101 case SLASH_TOKEN:
102 name = "'/'";
103 break;
104 case SEMICOLON_TOKEN:
105 name = "';'";
106 break;
107 case EQUALS_TOKEN:
108 name = "'='";
109 break;
110 }
111
112 return name;
113 }
114
115 /*
116 * Retrieve current token value.
117 *
118 * @returns A String containing the current token value
119 */
120 public String getCurrentTokenValue() {
121 return currentTokenValue;
122 }
123 /*
124 * Process the next token.
125 *
126 * @returns the next token
127 */
128 public int nextToken() {
129 if (dataIndex < dataLength) {
130 // skip white space
131 while ((dataIndex < dataLength) &&
132 (isWhiteSpaceChar(data.charAt(dataIndex)))) {
133 ++dataIndex;
134 }
135
136 if (dataIndex < dataLength) {
137 // examine the current character and see what kind of token we have
138 char c = data.charAt(dataIndex);
139 if (isAutoquoting) {
140 if (c == ';' || c == '=') {
141 currentToken = c;
142 currentTokenValue = new Character(c).toString();
143 ++dataIndex;
144 } else {
145 processAutoquoteToken();
146 }
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25
26 package com.sun.activation.registries;
27
28 /**
29 * A tokenizer for strings in the form of "foo/bar; prop1=val1; ... ".
30 * Useful for parsing MIME content types.
31 */
32 public class MailcapTokenizer {
33
34 public static final int UNKNOWN_TOKEN = 0;
35 public static final int START_TOKEN = 1;
36 public static final int STRING_TOKEN = 2;
37 public static final int EOI_TOKEN = 5;
38 public static final int SLASH_TOKEN = '/';
39 public static final int SEMICOLON_TOKEN = ';';
40 public static final int EQUALS_TOKEN = '=';
41
42 /**
43 * Constructor
44 *
45 * @param inputString the string to tokenize
46 */
47 public MailcapTokenizer(String inputString) {
48 data = inputString;
49 dataIndex = 0;
50 dataLength = inputString.length();
51
52 currentToken = START_TOKEN;
53 currentTokenValue = "";
54
55 isAutoquoting = false;
56 autoquoteChar = ';';
57 }
58
59 /**
60 * Set whether auto-quoting is on or off.
61 *
62 * Auto-quoting means that all characters after the first
63 * non-whitespace, non-control character up to the auto-quote
64 * terminator character or EOI (minus any whitespace immediatley
65 * preceeding it) is considered a token.
66 *
67 * This is required for handling command strings in a mailcap entry.
68 */
69 public void setIsAutoquoting(boolean value) {
70 isAutoquoting = value;
71 }
72
73 /**
74 * Retrieve current token.
75 *
76 * @return The current token value
77 */
78 public int getCurrentToken() {
79 return currentToken;
80 }
81
82 /*
83 * Get a String that describes the given token.
84 */
85 public static String nameForToken(int token) {
86 String name = "really unknown";
87
88 switch(token) {
89 case UNKNOWN_TOKEN:
90 name = "unknown";
91 break;
92 case START_TOKEN:
93 name = "start";
94 break;
95 case STRING_TOKEN:
96 name = "string";
98 case EOI_TOKEN:
99 name = "EOI";
100 break;
101 case SLASH_TOKEN:
102 name = "'/'";
103 break;
104 case SEMICOLON_TOKEN:
105 name = "';'";
106 break;
107 case EQUALS_TOKEN:
108 name = "'='";
109 break;
110 }
111
112 return name;
113 }
114
115 /*
116 * Retrieve current token value.
117 *
118 * @return A String containing the current token value
119 */
120 public String getCurrentTokenValue() {
121 return currentTokenValue;
122 }
123 /*
124 * Process the next token.
125 *
126 * @return the next token
127 */
128 public int nextToken() {
129 if (dataIndex < dataLength) {
130 // skip white space
131 while ((dataIndex < dataLength) &&
132 (isWhiteSpaceChar(data.charAt(dataIndex)))) {
133 ++dataIndex;
134 }
135
136 if (dataIndex < dataLength) {
137 // examine the current character and see what kind of token we have
138 char c = data.charAt(dataIndex);
139 if (isAutoquoting) {
140 if (c == ';' || c == '=') {
141 currentToken = c;
142 currentTokenValue = new Character(c).toString();
143 ++dataIndex;
144 } else {
145 processAutoquoteToken();
146 }
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