diff options
Diffstat (limited to 'src/com/gitblit/utils/StringUtils.java')
| -rw-r--r-- | src/com/gitblit/utils/StringUtils.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/com/gitblit/utils/StringUtils.java b/src/com/gitblit/utils/StringUtils.java index 219699fc..bb1928a2 100644 --- a/src/com/gitblit/utils/StringUtils.java +++ b/src/com/gitblit/utils/StringUtils.java @@ -22,18 +22,44 @@ import java.util.ArrayList; import java.util.List;
import java.util.regex.PatternSyntaxException;
+/**
+ * Utility class of string functions.
+ *
+ * @author James Moger
+ *
+ */
public class StringUtils {
public static final String MD5_TYPE = "MD5:";
+ /**
+ * Returns true if the string is null or empty.
+ *
+ * @param value
+ * @return true if string is null or empty
+ */
public static boolean isEmpty(String value) {
return value == null || value.trim().length() == 0;
}
+ /**
+ * Replaces carriage returns and line feeds with html line breaks.
+ *
+ * @param string
+ * @return plain text with html line breaks
+ */
public static String breakLinesForHtml(String string) {
return string.replace("\r\n", "<br/>").replace("\r", "<br/>").replace("\n", "<br/>");
}
+ /**
+ * Prepare text for html presentation. Replace sensitive characters with
+ * html entities.
+ *
+ * @param inStr
+ * @param changeSpace
+ * @return plain text escaped for html
+ */
public static String escapeForHtml(String inStr, boolean changeSpace) {
StringBuffer retStr = new StringBuffer();
int i = 0;
@@ -58,11 +84,23 @@ public class StringUtils { return retStr.toString();
}
+ /**
+ * Decode html entities back into plain text characters.
+ *
+ * @param inStr
+ * @return returns plain text from html
+ */
public static String decodeFromHtml(String inStr) {
return inStr.replace("&", "&").replace("<", "<").replace(">", ">")
.replace(""", "\"").replace(" ", " ");
}
+ /**
+ * Encodes a url parameter by escaping troublesome characters.
+ *
+ * @param inStr
+ * @return properly escaped url
+ */
public static String encodeURL(String inStr) {
StringBuffer retStr = new StringBuffer();
int i = 0;
@@ -79,10 +117,24 @@ public class StringUtils { return retStr.toString();
}
+ /**
+ * Flatten the list of strings into a single string with a space separator.
+ *
+ * @param values
+ * @return flattened list
+ */
public static String flattenStrings(List<String> values) {
return flattenStrings(values, " ");
}
+ /**
+ * Flatten the list of strings into a single string with the specified
+ * separator.
+ *
+ * @param values
+ * @param separator
+ * @return flattened list
+ */
public static String flattenStrings(List<String> values, String separator) {
StringBuilder sb = new StringBuilder();
for (String value : values) {
@@ -91,6 +143,15 @@ public class StringUtils { return sb.toString().trim();
}
+ /**
+ * Returns a string trimmed to a maximum length with trailing ellipses. If
+ * the string length is shorter than the max, the original string is
+ * returned.
+ *
+ * @param value
+ * @param max
+ * @return trimmed string
+ */
public static String trimString(String value, int max) {
if (value.length() <= max) {
return value;
@@ -98,10 +159,25 @@ public class StringUtils { return value.substring(0, max - 3) + "...";
}
+ /**
+ * Returns a trimmed shortlog message.
+ *
+ * @param string
+ * @return trimmed shortlog message
+ */
public static String trimShortLog(String string) {
return trimString(string, 60);
}
+ /**
+ * Left pad a string with the specified character, if the string length is
+ * less than the specified length.
+ *
+ * @param input
+ * @param length
+ * @param pad
+ * @return left-padded string
+ */
public static String leftPad(String input, int length, char pad) {
if (input.length() < length) {
StringBuilder sb = new StringBuilder();
@@ -114,6 +190,15 @@ public class StringUtils { return input;
}
+ /**
+ * Right pad a string with the specified character, if the string length is
+ * less then the specified length.
+ *
+ * @param input
+ * @param length
+ * @param pad
+ * @return right-padded string
+ */
public static String rightPad(String input, int length, char pad) {
if (input.length() < length) {
StringBuilder sb = new StringBuilder();
@@ -126,6 +211,12 @@ public class StringUtils { return input;
}
+ /**
+ * Calculates the SHA1 of the string.
+ *
+ * @param text
+ * @return sha1 of the string
+ */
public static String getSHA1(String text) {
try {
byte[] bytes = text.getBytes("iso-8859-1");
@@ -135,6 +226,12 @@ public class StringUtils { }
}
+ /**
+ * Calculates the SHA1 of the byte array.
+ *
+ * @param bytes
+ * @return sha1 of the byte array
+ */
public static String getSHA1(byte[] bytes) {
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
@@ -146,6 +243,12 @@ public class StringUtils { }
}
+ /**
+ * Calculates the MD5 of the string.
+ *
+ * @param string
+ * @return md5 of the string
+ */
public static String getMD5(String string) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
@@ -160,6 +263,12 @@ public class StringUtils { }
}
+ /**
+ * Returns the hex representation of the byte array.
+ *
+ * @param bytes
+ * @return byte array as hex string
+ */
private static String toHex(byte[] bytes) {
StringBuilder sb = new StringBuilder(bytes.length * 2);
for (int i = 0; i < bytes.length; i++) {
@@ -171,6 +280,13 @@ public class StringUtils { return sb.toString();
}
+ /**
+ * Returns the root path of the specified path. Returns a blank string if
+ * there is no root path.
+ *
+ * @param path
+ * @return root path or blank
+ */
public static String getRootPath(String path) {
if (path.indexOf('/') > -1) {
return path.substring(0, path.lastIndexOf('/'));
@@ -178,6 +294,14 @@ public class StringUtils { return "";
}
+ /**
+ * Returns the path remainder after subtracting the basePath from the
+ * fullPath.
+ *
+ * @param basePath
+ * @param fullPath
+ * @return the relative path
+ */
public static String getRelativePath(String basePath, String fullPath) {
String relativePath = fullPath.substring(basePath.length()).replace('\\', '/');
if (relativePath.charAt(0) == '/') {
@@ -186,10 +310,23 @@ public class StringUtils { return relativePath;
}
+ /**
+ * Splits the space-separated string into a list of strings.
+ *
+ * @param value
+ * @return list of strings
+ */
public static List<String> getStringsFromValue(String value) {
return getStringsFromValue(value, " ");
}
+ /**
+ * Splits the string into a list of string by the specified separator.
+ *
+ * @param value
+ * @param separator
+ * @return list of strings
+ */
public static List<String> getStringsFromValue(String value, String separator) {
List<String> strings = new ArrayList<String>();
try {
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