rcc.jj

hadoop:Nutch集群平台

options {
STATIC=false;
}

PARSER_BEGIN(Rcc)
/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.record.compiler.generated;

import org.apache.hadoop.record.compiler.*;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.io.File;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Rcc {
    private static String language = "java";
    private static ArrayList recFiles = new ArrayList();
    private static JFile curFile;
    private static Hashtable recTab;
    private static String curDir = System.getProperty("user.dir");
    private static String curFileName;
    private static String curModuleName;

    public static void main(String args[]) {
        for (int i=0; i<args.length; i++) {
            if ("-l".equalsIgnoreCase(args[i]) ||
                "--language".equalsIgnoreCase(args[i])) {
                language = args[i+1].toLowerCase();
                i++;
            } else {
                recFiles.add(args[i]);
            }
        }
        if (!"c++".equals(language) && !"java".equals(language)) {
            System.out.println("Cannot recognize language:" + language);
            System.exit(1);
        }
        if (recFiles.size() == 0) {
            System.out.println("No record files specified. Exiting.");
            System.exit(1);
        }
        for (int i=0; i<recFiles.size(); i++) {
            curFileName = (String) recFiles.get(i);
            File file = new File(curDir, curFileName);
            try {
                FileReader reader = new FileReader(file);
                Rcc parser = new Rcc(reader);
                try {
                    recTab = new Hashtable();
                    curFile = parser.Input();
                    System.out.println((String) recFiles.get(i) +
                        " Parsed Successfully");
                } catch (ParseException e) {
                    System.out.println(e.toString());
                    System.exit(1);
                }
                try {
                    reader.close();
                } catch (IOException e) {
                }
            } catch (FileNotFoundException e) {
                System.out.println("File " + (String) recFiles.get(i) +
                    " Not found.");
                System.exit(1);
            }
            try {
                curFile.genCode(language);
            } catch (IOException e) {
                System.out.println(e.toString());
                System.exit(1);
            }
        }
    }
}

PARSER_END(Rcc)

SKIP :
{
  " "
| "\t"
| "\n"
| "\r"
}

SPECIAL_TOKEN :
{
  "//" : WithinOneLineComment
}

<WithinOneLineComment> SPECIAL_TOKEN :
{
  <("\n" | "\r" | "\r\n" )> : DEFAULT
}

<WithinOneLineComment> MORE :
{
  <~[]>
}

SPECIAL_TOKEN :
{
  "/*" : WithinMultiLineComment
}

<WithinMultiLineComment> SPECIAL_TOKEN :
{
  "*/" : DEFAULT
}

<WithinMultiLineComment> MORE :
{
  <~[]>
}

TOKEN :
{
    <MODULE_TKN: "module">
|   <RECORD_TKN: "class">
|   <INCLUDE_TKN: "include">
|   <BYTE_TKN: "byte">
|   <BOOLEAN_TKN: "boolean">
|   <INT_TKN: "int">
|   <LONG_TKN: "long">
|   <FLOAT_TKN: "float">
|   <DOUBLE_TKN: "double">
|   <USTRING_TKN: "ustring">
|   <BUFFER_TKN: "buffer">
|   <VECTOR_TKN: "vector">
|   <MAP_TKN: "map">
|   <LBRACE_TKN: "{">
|   <RBRACE_TKN: "}">
|   <LT_TKN: "<">
|   <GT_TKN: ">">
|   <SEMICOLON_TKN: ";">
|   <COMMA_TKN: ",">
|   <DOT_TKN: ".">
|   <CSTRING_TKN: "\"" ( ~["\""] )+ "\"">
|   <IDENT_TKN: ["A"-"Z","a"-"z"] (["a"-"z","A"-"Z","0"-"9","_"])*>
}

JFile Input() :
{
    ArrayList ilist = new ArrayList();
    ArrayList rlist = new ArrayList();
    JFile i;
    ArrayList l;
}
{
    (
        i = Include()
        { ilist.add(i); }
    |   l = Module()
        { rlist.addAll(l); }
    )+
    <EOF>
    { return new JFile(curFileName, ilist, rlist); }
}

JFile Include() :
{
    String fname;
    Token t;
}
{
    <INCLUDE_TKN>
    t = <CSTRING_TKN>
    {
        JFile ret = null;
        fname = t.image.replaceAll("^\"", "").replaceAll("\"$","");
        File file = new File(curDir, fname);
        String tmpDir = curDir;
        String tmpFile = curFileName;
        curDir = file.getParent();
        curFileName = file.getName();
        try {
            FileReader reader = new FileReader(file);
            Rcc parser = new Rcc(reader);
            try {
                ret = parser.Input();
                System.out.println(fname + " Parsed Successfully");
            } catch (ParseException e) {
                System.out.println(e.toString());
                System.exit(1);
            }
            try {
                reader.close();
            } catch (IOException e) {
            }
        } catch (FileNotFoundException e) {
            System.out.println("File " + fname +
                " Not found.");
            System.exit(1);
        }
        curDir = tmpDir;
        curFileName = tmpFile;
        return ret;
    }
}

ArrayList Module() :
{
    String mName;
    ArrayList rlist;
}
{
    <MODULE_TKN>
    mName = ModuleName()
    { curModuleName = mName; }
    <LBRACE_TKN>
    rlist = RecordList()
    <RBRACE_TKN>
    { return rlist; }
}

String ModuleName() :
{
    String name = "";
    Token t;
}
{
    t = <IDENT_TKN>
    { name += t.image; }
    (
        <DOT_TKN>
        t = <IDENT_TKN>
        { name += "." + t.image; }
    )*
    { return name; }
}

ArrayList RecordList() :
{
    ArrayList rlist = new ArrayList();
    JRecord r;
}
{
    (
        r = Record()
        { rlist.add(r); }
    )+
    { return rlist; }
}

JRecord Record() :
{
    String rname;
    ArrayList flist = new ArrayList();
    Token t;
    JField f;
}
{
    <RECORD_TKN>
    t = <IDENT_TKN>
    { rname = t.image; }
    <LBRACE_TKN>
    (
        f = Field()
        { flist.add(f); }
        <SEMICOLON_TKN>
    )+
    <RBRACE_TKN>
    {
        String fqn = curModuleName + "." + rname;
        JRecord r = new JRecord(fqn, flist);
        recTab.put(fqn, r);
        return r;
    }
}

JField Field() :
{
    JType jt;
    Token t;
}
{
    jt = Type()
    t = <IDENT_TKN>
    { return new JField(jt, t.image); }
}

JType Type() :
{
    JType jt;
    Token t;
    String rname;
}
{
    jt = Map()
    { return jt; }
|   jt = Vector()
    { return jt; }
|   <BYTE_TKN>
    { return new JByte(); }
|   <BOOLEAN_TKN>
    { return new JBoolean(); }
|   <INT_TKN>
    { return new JInt(); }
|   <LONG_TKN>
    { return new JLong(); }
|   <FLOAT_TKN>
    { return new JFloat(); }
|   <DOUBLE_TKN>
    { return new JDouble(); }
|   <USTRING_TKN>
    { return new JString(); }
|   <BUFFER_TKN>
    { return new JBuffer(); }
|   rname = ModuleName()
    {
        if (rname.indexOf('.', 0) < 0) {
            rname = curModuleName + "." + rname;
        }
        JRecord r = (JRecord) recTab.get(rname);
        if (r == null) {
            System.out.println("Type " + rname + " not known. Exiting.");
            System.exit(1);
        }
        return r;
    }
}

JMap Map() :
{
    JType jt1;
    JType jt2;
}
{
    <MAP_TKN>
    <LT_TKN>
    jt1 = Type()
    <COMMA_TKN>
    jt2 = Type()
    <GT_TKN>
    { return new JMap(jt1, jt2); }
}

JVector Vector() :
{
    JType jt;
}
{
    <VECTOR_TKN>
    <LT_TKN>
    jt = Type()
    <GT_TKN>
    { return new JVector(jt); }
}