102 lines
4.0 KiB
Java
102 lines
4.0 KiB
Java
|
|
/*
|
|
* Janino - An embedded Java[TM] compiler
|
|
*
|
|
* Copyright (c) 2001-2010, Arno Unkrig
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
|
|
* following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
|
|
* following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
|
|
* following disclaimer in the documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
package org.codehaus.janino.samples;
|
|
|
|
import java.io.FileReader;
|
|
import java.io.IOException;
|
|
|
|
import org.codehaus.commons.compiler.CompileException;
|
|
import org.codehaus.janino.Java;
|
|
import org.codehaus.janino.Parser;
|
|
import org.codehaus.janino.Scanner;
|
|
import org.codehaus.janino.util.Traverser;
|
|
|
|
/**
|
|
* An example application for the {@link org.codehaus.janino.util.Traverser}:
|
|
* Reads, scans and parses the files named on the command line and counts
|
|
* several kinds of declarations.
|
|
*/
|
|
public
|
|
class DeclarationCounter extends Traverser {
|
|
|
|
public static void // SUPPRESS CHECKSTYLE JavadocMethod
|
|
main(String[] args) throws CompileException, IOException {
|
|
DeclarationCounter dc = new DeclarationCounter();
|
|
for (String fileName : args) {
|
|
|
|
// Parse each compilation unit.
|
|
FileReader r = new FileReader(fileName);
|
|
Java.CompilationUnit cu;
|
|
try {
|
|
cu = new Parser(new Scanner(fileName, r)).parseCompilationUnit();
|
|
} finally {
|
|
r.close();
|
|
}
|
|
|
|
// Traverse it and count declarations.
|
|
dc.traverseCompilationUnit(cu);
|
|
}
|
|
|
|
System.out.println("Class declarations: " + dc.classDeclarationCount);
|
|
System.out.println("Interface declarations: " + dc.interfaceDeclarationCount);
|
|
System.out.println("Fields: " + dc.fieldCount);
|
|
System.out.println("Local variables: " + dc.localVariableCount);
|
|
}
|
|
|
|
// Count class declarations.
|
|
@Override public void
|
|
traverseClassDeclaration(Java.ClassDeclaration cd) {
|
|
++this.classDeclarationCount;
|
|
super.traverseClassDeclaration(cd);
|
|
}
|
|
private int classDeclarationCount;
|
|
|
|
// Count interface declarations.
|
|
@Override public void
|
|
traverseInterfaceDeclaration(Java.InterfaceDeclaration id) {
|
|
++this.interfaceDeclarationCount;
|
|
super.traverseInterfaceDeclaration(id);
|
|
}
|
|
private int interfaceDeclarationCount;
|
|
|
|
// Count fields.
|
|
@Override public void
|
|
traverseFieldDeclaration(Java.FieldDeclaration fd) {
|
|
this.fieldCount += fd.variableDeclarators.length;
|
|
super.traverseFieldDeclaration(fd);
|
|
}
|
|
private int fieldCount;
|
|
|
|
// Count local variables.
|
|
@Override public void
|
|
traverseLocalVariableDeclarationStatement(Java.LocalVariableDeclarationStatement lvds) {
|
|
this.localVariableCount += lvds.variableDeclarators.length;
|
|
super.traverseLocalVariableDeclarationStatement(lvds);
|
|
}
|
|
private int localVariableCount;
|
|
}
|