Example usage for com.google.common.primitives Chars ensureCapacity

Introduction

In this page you can find the example usage for com.google.common.primitives Chars ensureCapacity.

Prototype

public static char[] ensureCapacity(char[] array, int minLength, int padding) 

Source Link

Document

Returns an array containing the same values as array , but guaranteed to be of a specified minimum length.

Usage

From source file:com.google.template.soy.shared.internal.Sanitizers.java

/**
 * Called when we know we need to make a replacement.
 *
 * <p>At least one of {@code searchForEndCData} or {@code searchForEndTag} will be {@code true}.
 *
 * @param css The css string to modify/*from   ww w  .j  ava  2 s  .c  om*/
 * @param nextReplacement The location of the first replacement
 * @param searchForEndCData Whether there are any sequences of {@code ]]>}
 * @param searchForEndTag Whether there are any sequences of {@code </}
 * @return The modified string.
 */
private static String embedCssIntoHtmlSlow(String css, int nextReplacement, boolean searchForEndCData,
        boolean searchForEndTag) {
    // use an array instead of a stringbuilder so we can take advantage of the bulk copying
    // routine (String.getChars).  For some reason StringBuilder doesn't do this.
    char[] buf = new char[css.length() + 16];
    int endOfPreviousReplacement = 0;
    int bufIndex = 0;
    do {
        int charsToCopy = nextReplacement - endOfPreviousReplacement;
        buf = Chars.ensureCapacity(buf, bufIndex + charsToCopy + 4, 16);
        css.getChars(endOfPreviousReplacement, nextReplacement, buf, bufIndex);
        bufIndex += charsToCopy;
        char c = css.charAt(nextReplacement);
        if (c == ']') {
            buf[bufIndex++] = ']';
            buf[bufIndex++] = ']';
            buf[bufIndex++] = '\\';
            buf[bufIndex++] = '>';
            endOfPreviousReplacement = nextReplacement + 3;
        } else if (c == '<') {
            buf[bufIndex++] = '<';
            buf[bufIndex++] = '\\';
            buf[bufIndex++] = '/';
            endOfPreviousReplacement = nextReplacement + 2;
        } else {
            throw new AssertionError();
        }
        nextReplacement = -1;
        if (searchForEndTag) {
            int indexOfEndTag = css.indexOf("</", endOfPreviousReplacement);
            if (indexOfEndTag == -1) {
                searchForEndTag = false;
            } else {
                nextReplacement = indexOfEndTag;
            }
        }
        if (searchForEndCData) {
            int indexOfEndCData = css.indexOf("]]>", endOfPreviousReplacement);
            if (indexOfEndCData == -1) {
                searchForEndCData = false;
            } else {
                nextReplacement = nextReplacement == -1 ? indexOfEndCData
                        : Math.min(nextReplacement, indexOfEndCData);
            }
        }
    } while (nextReplacement != -1);
    // copy tail
    int charsToCopy = css.length() - endOfPreviousReplacement;
    buf = Chars.ensureCapacity(buf, bufIndex + charsToCopy, 16);
    css.getChars(endOfPreviousReplacement, css.length(), buf, bufIndex);
    bufIndex += charsToCopy;
    return new String(buf, 0, bufIndex);
}

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