com.google.flightmap.parsing.faa.nasr.tools.RecordClassMaker.java Source code

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Here is the source code for com.google.flightmap.parsing.faa.nasr.tools.RecordClassMaker.java

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/* 
 * Copyright (C) 2010 Google Inc.
 *
 * 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 com.google.flightmap.parsing.faa.nasr.tools;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.List;
import java.util.LinkedList;

import org.apache.commons.lang.WordUtils;

public class RecordClassMaker {
    private final String name;
    private final List<RecordEntry> entries;

    private RecordClassMaker(final String name, final List<RecordEntry> entries) {
        this.name = name;
        this.entries = entries;
    }

    public static void main(String[] args) {
        try {
            final BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            final String name = in.readLine();
            final List<RecordEntry> entries = new LinkedList<RecordEntry>();
            String line;
            while ((line = in.readLine()) != null) {
                final String[] parts = line.split("\\s+");
                final int length = Integer.parseInt(parts[0]);
                final int start = Integer.parseInt(parts[1]);
                final String entryName = parts[2];
                entries.add(new RecordEntry(length, start, entryName));
            }
            (new RecordClassMaker(name, entries)).execute();
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(1);
        }
    }

    private void execute() throws FileNotFoundException {
        final String className = WordUtils.capitalize(name.toLowerCase());
        final PrintWriter out = new PrintWriter(className + ".java");
        out.println("class " + className + " {");
        for (RecordEntry entry : entries) {
            out.println("  final String " + entry.name + ";");
        }
        out.println();
        out.println("  " + className + "(final String line) {");
        for (RecordEntry entry : entries) {
            final int start = entry.start - 1;
            out.println("    " + entry.name + " = line.substring(" + start + ", " + start + " + " + entry.length
                    + ").trim();");
        }
        out.println("  }");
        out.println("");
        out.println("  static boolean matches(final String line) {");
        out.println("    return line.startsWith(\"" + name + "\");");
        out.println("  }");
        out.println("}");
        out.close();
    }

    private static class RecordEntry {
        final int length;
        final int start;
        final String name;

        RecordEntry(final int length, final int start, final String name) {
            this.length = length;
            this.start = start;
            this.name = name;
        }
    }
}