Example usage for org.antlr.v4.tool Grammar getTokenDisplayName

Introduction

In this page you can find the example usage for org.antlr.v4.tool Grammar getTokenDisplayName.

Prototype

public String getTokenDisplayName(int ttype) 

Source Link

Document

Given a token type, get a meaningful name for it such as the ID or string literal.

Usage

From source file:net.certiv.json.test.base.AbstractBase.java

License:Open Source License

protected void checkSymbols(Grammar g, String rulesStr, String allValidTokensStr) throws Exception {
    String[] typeToTokenName = g.getTokenNames();
    Set<String> tokens = new HashSet<String>();
    for (int i = 0; i < typeToTokenName.length; i++) {
        String t = typeToTokenName[i];
        if (t != null) {
            if (t.startsWith(Grammar.AUTO_GENERATED_TOKEN_NAME_PREFIX)) {
                tokens.add(g.getTokenDisplayName(i));
            } else {
                tokens.add(t);//www  . j  ava 2 s .  c o m
            }
        }
    }

    // make sure expected tokens are there
    StringTokenizer st = new StringTokenizer(allValidTokensStr, ", ");
    while (st.hasMoreTokens()) {
        String tokenName = st.nextToken();
        assertTrue("token " + tokenName + " expected, but was undefined",
                g.getTokenType(tokenName) != Token.INVALID_TYPE);
        tokens.remove(tokenName);
    }
    // make sure there are not any others (other than <EOF> etc...)
    for (String tokenName : tokens) {
        assertTrue("unexpected token name " + tokenName, g.getTokenType(tokenName) < Token.MIN_USER_TOKEN_TYPE);
    }

    // make sure all expected rules are there
    st = new StringTokenizer(rulesStr, ", ");
    int n = 0;
    while (st.hasMoreTokens()) {
        String ruleName = st.nextToken();
        assertNotNull("rule " + ruleName + " expected", g.getRule(ruleName));
        n++;
    }
    Assert.assertEquals("number of rules mismatch; expecting " + n + "; found " + g.rules.size(), n,
            g.rules.size());
}

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