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enhance escape and replace method.
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liujianjun.ljj committed Aug 13, 2024
1 parent 0a5375a commit 097a51a
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Showing 3 changed files with 320 additions and 25 deletions.
3 changes: 3 additions & 0 deletions tracer-core/src/main/java/com/alipay/common/tracer/core/appender/builder/XStringBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -34,10 +34,13 @@ public class XStringBuilder {
public static final char DEFAULT_SEPARATOR = ',';
public static final String DEFAULT_SEPARATOR_ESCAPE = "%2C";
public static final String AND_SEPARATOR = "&";
public static final char AND_SEPARATOR_CHAR = '&';
public static final String AND_SEPARATOR_ESCAPE = "%26";
public static final String EQUAL_SEPARATOR = "=";
public static final char EQUAL_SEPARATOR_CHAR = '=';
public static final String EQUAL_SEPARATOR_ESCAPE = "%3D";
public static final String PERCENT = "%";
public static final char PERCENT_CHAR = '%';
public static final String PERCENT_ESCAPE = "%25";

private static char separator = DEFAULT_SEPARATOR;
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304 changes: 279 additions & 25 deletions tracer-core/src/main/java/com/alipay/common/tracer/core/utils/StringUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,8 @@ public class StringUtils {

private static final String CURRENT_PATH = ".";

public static final int INDEX_NOT_FOUND = -1;

public static boolean isBlank(String str) {
int strLen;
if (str == null || (strLen = str.length()) == 0) {
Expand All @@ -74,6 +76,14 @@ public static boolean isNotBlank(String str) {
return !isBlank(str);
}

public static boolean isEmpty(final CharSequence cs) {
return cs == null || cs.length() == 0;
}

public static boolean isNotEmpty(String str) {
return !isEmpty(str);
}

/**
* Convert the map to a string and add the specified prefix to each key, such as {"k1":"v1"}
*
Expand Down Expand Up @@ -221,10 +231,23 @@ public static String arrayToString(Object[] items, char separator, String prefix
* @param str origin data
*/
public static String escapePercentEqualAnd(String str) {
//You must first escape the %
return escape(
escape(escape(str, PERCENT, PERCENT_ESCAPE), AND_SEPARATOR, AND_SEPARATOR_ESCAPE),
EQUAL_SEPARATOR, EQUAL_SEPARATOR_ESCAPE);
if (str == null) {
return StringUtils.EMPTY_STRING;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
if (ch == PERCENT_CHAR) {
sb.append(PERCENT_ESCAPE);
} else if (ch == AND_SEPARATOR_CHAR) {
sb.append(AND_SEPARATOR_ESCAPE);
} else if (ch == EQUAL_SEPARATOR_CHAR) {
sb.append(EQUAL_SEPARATOR_ESCAPE);
} else {
sb.append(ch);
}
}
return sb.toString();
}

/**
Expand All @@ -249,7 +272,7 @@ private static String escape(String str, String oldStr, String newStr) {
if (str == null) {
return StringUtils.EMPTY_STRING;
}
return str.replace(oldStr, newStr);
return replace(str, oldStr, newStr);
}

public static boolean hasText(CharSequence str) {
Expand Down Expand Up @@ -434,33 +457,264 @@ public static String deleteAny(String inString, String charsToDelete) {
* @return a {@code String} with the replacements
*/
public static String replace(String inString, String oldPattern, String newPattern) {
if (isBlank(inString) || isBlank(oldPattern) || newPattern == null) {
return inString;
return replace(inString, oldPattern, newPattern, -1);
}

/**
* Replaces a String with another String inside a larger String,
* for the first {@code max} values of the search String.
*
* <p>A {@code null} reference passed to this method is a no-op.</p>
*
* <pre>
* StringUtils.replace(null, *, *, *) = null
* StringUtils.replace("", *, *, *) = ""
* StringUtils.replace("any", null, *, *) = "any"
* StringUtils.replace("any", *, null, *) = "any"
* StringUtils.replace("any", "", *, *) = "any"
* StringUtils.replace("any", *, *, 0) = "any"
* StringUtils.replace("abaa", "a", null, -1) = "abaa"
* StringUtils.replace("abaa", "a", "", -1) = "b"
* StringUtils.replace("abaa", "a", "z", 0) = "abaa"
* StringUtils.replace("abaa", "a", "z", 1) = "zbaa"
* StringUtils.replace("abaa", "a", "z", 2) = "zbza"
* StringUtils.replace("abaa", "a", "z", -1) = "zbzz"
* </pre>
*
* @param text text to search and replace in, may be null
* @param searchString the String to search for, may be null
* @param replacement the String to replace it with, may be null
* @param max maximum number of values to replace, or {@code -1} if no maximum
* @return the text with any replacements processed,
* {@code null} if null String input
*/
public static String replace(final String text, final String searchString,
final String replacement, final int max) {
return replace(text, searchString, replacement, max, false);
}

/**
* Replaces a String with another String inside a larger String,
* for the first {@code max} values of the search String,
* case-sensitively/insensitively based on {@code ignoreCase} value.
*
* <p>A {@code null} reference passed to this method is a no-op.</p>
*
* <pre>
* StringUtils.replace(null, *, *, *, false) = null
* StringUtils.replace("", *, *, *, false) = ""
* StringUtils.replace("any", null, *, *, false) = "any"
* StringUtils.replace("any", *, null, *, false) = "any"
* StringUtils.replace("any", "", *, *, false) = "any"
* StringUtils.replace("any", *, *, 0, false) = "any"
* StringUtils.replace("abaa", "a", null, -1, false) = "abaa"
* StringUtils.replace("abaa", "a", "", -1, false) = "b"
* StringUtils.replace("abaa", "a", "z", 0, false) = "abaa"
* StringUtils.replace("abaa", "A", "z", 1, false) = "abaa"
* StringUtils.replace("abaa", "A", "z", 1, true) = "zbaa"
* StringUtils.replace("abAa", "a", "z", 2, true) = "zbza"
* StringUtils.replace("abAa", "a", "z", -1, true) = "zbzz"
* </pre>
*
* @param text text to search and replace in, may be null
* @param searchString the String to search for (case-insensitive), may be null
* @param replacement the String to replace it with, may be null
* @param max maximum number of values to replace, or {@code -1} if no maximum
* @param ignoreCase if true replace is case-insensitive, otherwise case-sensitive
* @return the text with any replacements processed,
* {@code null} if null String input
*/
private static String replace(final String text, String searchString, final String replacement,
int max, final boolean ignoreCase) {
if (isEmpty(text) || isEmpty(searchString) || replacement == null || max == 0) {
return text;
}
if (ignoreCase) {
searchString = searchString.toLowerCase();
}
int start = 0;
int end = ignoreCase ? indexOfIgnoreCase(text, searchString, start) : indexOf(text,
searchString, start);
if (end == INDEX_NOT_FOUND) {
return text;
}
final int replLength = searchString.length();
int increase = Math.max(replacement.length() - replLength, 0);
increase *= max < 0 ? 16 : Math.min(max, 64);
final StringBuilder buf = new StringBuilder(text.length() + increase);
while (end != INDEX_NOT_FOUND) {
buf.append(text, start, end).append(replacement);
start = end + replLength;
if (--max == 0) {
break;
}
end = ignoreCase ? indexOfIgnoreCase(text, searchString, start) : indexOf(text,
searchString, start);
}
int index = inString.indexOf(oldPattern);
if (index == -1) {
// no occurrence -> can return input as-is
return inString;
buf.append(text, start, text.length());
return buf.toString();
}

/**
* Finds the first index within a CharSequence, handling {@code null}.
* This method uses {@link String#indexOf(String, int)} if possible.
*
* <p>A {@code null} CharSequence will return {@code -1}.
* A negative start position is treated as zero.
* An empty ("") search CharSequence always matches.
* A start position greater than the string length only matches
* an empty search CharSequence.</p>
*
* <pre>
* StringUtils.indexOf(null, *, *) = -1
* StringUtils.indexOf(*, null, *) = -1
* StringUtils.indexOf("", "", 0) = 0
* StringUtils.indexOf("", *, 0) = -1 (except when * = "")
* StringUtils.indexOf("aabaabaa", "a", 0) = 0
* StringUtils.indexOf("aabaabaa", "b", 0) = 2
* StringUtils.indexOf("aabaabaa", "ab", 0) = 1
* StringUtils.indexOf("aabaabaa", "b", 3) = 5
* StringUtils.indexOf("aabaabaa", "b", 9) = -1
* StringUtils.indexOf("aabaabaa", "b", -1) = 2
* StringUtils.indexOf("aabaabaa", "", 2) = 2
* StringUtils.indexOf("abc", "", 9) = 3
* </pre>
*
* @param seq the CharSequence to check, may be null
* @param searchSeq the CharSequence to find, may be null
* @param startPos the start position, negative treated as zero
* @return the first index of the search CharSequence (always &ge; startPos),
* -1 if no match or {@code null} string input
* @since 2.0
* @since 3.0 Changed signature from indexOf(String, String, int) to indexOf(CharSequence, CharSequence, int)
*/
public static int indexOf(final CharSequence seq, final CharSequence searchSeq,
final int startPos) {
if (seq == null || searchSeq == null) {
return INDEX_NOT_FOUND;
}
if (seq instanceof String) {
return ((String) seq).indexOf(searchSeq.toString(), startPos);
} else if (seq instanceof StringBuilder) {
return ((StringBuilder) seq).indexOf(searchSeq.toString(), startPos);
} else if (seq instanceof StringBuffer) {
return ((StringBuffer) seq).indexOf(searchSeq.toString(), startPos);
}
return seq.toString().indexOf(searchSeq.toString(), startPos);
}

/**
* Case in-sensitive find of the first index within a CharSequence
* from the specified position.
*
* <p>A {@code null} CharSequence will return {@code -1}.
* A negative start position is treated as zero.
* An empty ("") search CharSequence always matches.
* A start position greater than the string length only matches
* an empty search CharSequence.</p>
*
* <pre>
* StringUtils.indexOfIgnoreCase(null, *, *) = -1
* StringUtils.indexOfIgnoreCase(*, null, *) = -1
* StringUtils.indexOfIgnoreCase("", "", 0) = 0
* StringUtils.indexOfIgnoreCase("aabaabaa", "A", 0) = 0
* StringUtils.indexOfIgnoreCase("aabaabaa", "B", 0) = 2
* StringUtils.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
* StringUtils.indexOfIgnoreCase("aabaabaa", "B", 3) = 5
* StringUtils.indexOfIgnoreCase("aabaabaa", "B", 9) = -1
* StringUtils.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
* StringUtils.indexOfIgnoreCase("aabaabaa", "", 2) = 2
* StringUtils.indexOfIgnoreCase("abc", "", 9) = -1
* </pre>
*
* @param str the CharSequence to check, may be null
* @param searchStr the CharSequence to find, may be null
* @param startPos the start position, negative treated as zero
* @return the first index of the search CharSequence (always &ge; startPos),
* -1 if no match or {@code null} string input
* @since 2.5
* @since 3.0 Changed signature from indexOfIgnoreCase(String, String, int) to indexOfIgnoreCase(CharSequence, CharSequence, int)
*/
public static int indexOfIgnoreCase(final CharSequence str, final CharSequence searchStr,
int startPos) {
if (str == null || searchStr == null) {
return INDEX_NOT_FOUND;
}
if (startPos < 0) {
startPos = 0;
}
final int endLimit = str.length() - searchStr.length() + 1;
if (startPos > endLimit) {
return INDEX_NOT_FOUND;
}
if (searchStr.length() == 0) {
return startPos;
}
for (int i = startPos; i < endLimit; i++) {
if (regionMatches(str, true, i, searchStr, 0, searchStr.length())) {
return i;
}
}
return INDEX_NOT_FOUND;
}

int capacity = inString.length();
if (newPattern.length() > oldPattern.length()) {
capacity += 16;
/**
* Green implementation of regionMatches.
*
* @param cs the {@code CharSequence} to be processed
* @param ignoreCase whether or not to be case insensitive
* @param thisStart the index to start on the {@code cs} CharSequence
* @param substring the {@code CharSequence} to be looked for
* @param start the index to start on the {@code substring} CharSequence
* @param length character length of the region
* @return whether the region matched
*/
public static boolean regionMatches(final CharSequence cs, final boolean ignoreCase,
final int thisStart, final CharSequence substring,
final int start, final int length) {
if (cs instanceof String && substring instanceof String) {
return ((String) cs).regionMatches(ignoreCase, thisStart, (String) substring, start,
length);
}
int index1 = thisStart;
int index2 = start;
int tmpLen = length;

// Extract these first so we detect NPEs the same as the java.lang.String version
final int srcLen = cs.length() - thisStart;
final int otherLen = substring.length() - start;

// Check for invalid parameters
if (thisStart < 0 || start < 0 || length < 0) {
return false;
}
StringBuilder sb = new StringBuilder(capacity);

int pos = 0; // our position in the old string
int patLen = oldPattern.length();
while (index >= 0) {
sb.append(inString.substring(pos, index));
sb.append(newPattern);
pos = index + patLen;
index = inString.indexOf(oldPattern, pos);
// Check that the regions are long enough
if (srcLen < length || otherLen < length) {
return false;
}

// append any characters to the right of a match
sb.append(inString.substring(pos));
return sb.toString();
while (tmpLen-- > 0) {
final char c1 = cs.charAt(index1++);
final char c2 = substring.charAt(index2++);

if (c1 == c2) {
continue;
}

if (!ignoreCase) {
return false;
}

// The real same check as in String.regionMatches():
final char u1 = Character.toUpperCase(c1);
final char u2 = Character.toUpperCase(c2);
if (u1 != u2 && Character.toLowerCase(u1) != Character.toLowerCase(u2)) {
return false;
}
}

return true;
}

/**
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