com.thoughtworks.qdox.model.util.TagParser Maven / Gradle / Ivy
package com.thoughtworks.qdox.model.util;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* http://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.
*/
import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
public final class TagParser {
private TagParser()
{
// hide utility class constructor
}
/**
* Create a StreamTokenizer suitable for parsing the tag text.
*
* @param tagValue the tag value
* @return the tokenizer
*/
static StreamTokenizer makeTokenizer(String tagValue) {
StreamTokenizer tokenizer =
new StreamTokenizer(new StringReader(tagValue));
tokenizer.resetSyntax();
tokenizer.wordChars('A','Z');
tokenizer.wordChars('a','z');
tokenizer.wordChars('0','9');
tokenizer.wordChars('-','-');
tokenizer.wordChars('_','_');
tokenizer.wordChars('.','.');
tokenizer.wordChars('<','<');
tokenizer.wordChars('>','>');
tokenizer.quoteChar('\'');
tokenizer.quoteChar('"');
tokenizer.whitespaceChars(' ',' ');
tokenizer.whitespaceChars('\t','\t');
tokenizer.whitespaceChars('\n','\n');
tokenizer.whitespaceChars('\r','\r');
tokenizer.eolIsSignificant(false);
return tokenizer;
}
/**
* Extract a Map of named parameters
*
* @param tagValue the tag value
* @return a Map with the parameter names and their values
*/
public static Map parseNamedParameters(String tagValue) {
Map paramMap = new LinkedHashMap();
StreamTokenizer tokenizer = makeTokenizer(tagValue);
try {
while (tokenizer.nextToken() == StreamTokenizer.TT_WORD) {
String key = tokenizer.sval;
if (tokenizer.nextToken() != '=') {
break;
}
switch (tokenizer.nextToken()) {
case StreamTokenizer.TT_WORD:
case '"':
case '\'':
paramMap.put(key, tokenizer.sval);
default:
break;
}
}
} catch (IOException e) {
// ignore
}
return paramMap;
}
/**
* Extract an array of positional parameters
*
* @param tagValue the tag value
* @return an array with words
*/
public static String[] parseWords(String tagValue) {
StreamTokenizer tokenizer = makeTokenizer(tagValue);
List wordList = new ArrayList();
try {
while (tokenizer.nextToken() != StreamTokenizer.TT_EOF) {
if (tokenizer.sval == null) {
wordList.add(Character.toString((char)tokenizer.ttype));
} else {
wordList.add(tokenizer.sval);
}
}
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("error tokenizing tag");
}
return wordList.toArray(new String[0]);
}
/**
* Extract an array of parameters as name or name=value representation
*
* @param tagValue the tag value
* @return the names of the parameters
* @since 1.11
*/
public static List parseParameters(String tagValue) {
StreamTokenizer tokenizer = makeTokenizer(tagValue);
List wordList = new LinkedList();
try {
while (tokenizer.nextToken() != StreamTokenizer.TT_EOF) {
StringBuilder param = new StringBuilder();
if (tokenizer.sval != null) {
param.append( tokenizer.sval );
}
//check for parameterValues
while (tokenizer.nextToken() != StreamTokenizer.TT_EOF) {
if(tokenizer.sval == null && ('=' == (char)tokenizer.ttype || ','== (char)tokenizer.ttype)){
param.append( Character.toString( (char)tokenizer.ttype ) );
//file was parsed correctly, so this works.
tokenizer.nextToken();
param.append(tokenizer.sval);
}
else {
tokenizer.pushBack(); break;
}
}
wordList.add(param.toString());
}
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("error tokenizing tag");
}
return wordList;
}
}