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PatternScanner.javaAPI DocAndroid 5.1 API3404Thu Mar 12 22:22:30 GMT 2015android.filterfw.io

PatternScanner

public class PatternScanner extends Object
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Fields Summary
private String
mInput
private Pattern
mIgnorePattern
private int
mOffset
private int
mLineNo
private int
mStartOfLine
Constructors Summary
public PatternScanner(String input)


       
        mInput = input;
public PatternScanner(String input, Pattern ignorePattern)

        mInput = input;
        mIgnorePattern = ignorePattern;
        skip(mIgnorePattern);
Methods Summary
public booleanatEnd()

        return mOffset >= mInput.length();
public java.lang.Stringeat(java.util.regex.Pattern pattern, java.lang.String tokenName)

        String result = tryEat(pattern);
        if (result == null) {
            throw new RuntimeException(unexpectedTokenMessage(tokenName));
        }
        return result;
public intlineNo()

        return mLineNo;
public booleanpeek(java.util.regex.Pattern pattern)

        // Skip ignore pattern
        if (mIgnorePattern != null) {
            skip(mIgnorePattern);
        }

        // Create the matcher
        Matcher matcher = pattern.matcher(mInput);
        matcher.region(mOffset, mInput.length());

        // Attempt to match
        return matcher.lookingAt();
public voidskip(java.util.regex.Pattern pattern)

        Matcher matcher = pattern.matcher(mInput);
        matcher.region(mOffset, mInput.length());
        if (matcher.lookingAt()) {
            updateLineCount(mOffset, matcher.end());
            mOffset = matcher.end();
        }
public java.lang.StringtryEat(java.util.regex.Pattern pattern)

        // Skip ignore pattern
        if (mIgnorePattern != null) {
            skip(mIgnorePattern);
        }

        // Create the matcher
        Matcher matcher = pattern.matcher(mInput);
        matcher.region(mOffset, mInput.length());

        // Attempt to match
        String result = null;
        if (matcher.lookingAt()) {
            updateLineCount(mOffset, matcher.end());
            mOffset = matcher.end();
            result = mInput.substring(matcher.start(), matcher.end());
        }

        // Skip ignore pattern
        if (result != null && mIgnorePattern != null) {
            skip(mIgnorePattern);
        }

        return result;
public java.lang.StringunexpectedTokenMessage(java.lang.String tokenName)

        String line = mInput.substring(mStartOfLine, mOffset);
        return "Unexpected token on line " + (mLineNo + 1) + " after '" + line + "' <- Expected " +
                tokenName + "!";
public voidupdateLineCount(int start, int end)

        for (int i = start; i < end; ++i) {
            if (mInput.charAt(i) == '\n") {
                ++mLineNo;
                mStartOfLine = i + 1;
            }
        }