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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package com.sun.tools.xjc.writer;

import java.io.IOException;
import java.io.Writer;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;

import com.sun.codemodel.JClass;
import com.sun.codemodel.JClassContainer;
import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JPackage;
import com.sun.codemodel.JType;
import com.sun.tools.xjc.outline.ClassOutline;
import com.sun.tools.xjc.outline.FieldOutline;
import com.sun.tools.xjc.outline.Outline;

/**
 * Dumps an annotated grammar in a simple format that
 * makes signature check easy.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
public class SignatureWriter {
    
    public static void write( Outline model, Writer out )
        throws IOException {
        
        new SignatureWriter(model,out).dump();
    }
    
    private SignatureWriter( Outline model, Writer out ) {
        this.out = out;
        this.classes = model.getClasses();

        for( ClassOutline ci : classes )
            classSet.put( ci.ref, ci );
    }
    
    /** All the ClassItems in this grammar. */
    private final Collection classes;
    /** Map from content interfaces to ClassItem. */
    private final Map classSet = new HashMap();
    
    private final Writer out;
    private int indent=0;
    private void printIndent() throws IOException {
        for( int i=0; i packages = new TreeSet(new Comparator() {
            public int compare(JPackage lhs, JPackage rhs) {
                return lhs.name().compareTo(rhs.name());
            }
        });
        for( ClassOutline ci : classes )
            packages.add(ci._package()._package());

        for( JPackage pkg : packages )
            dump( pkg );
        
        out.flush();
    }
    
    private void dump( JPackage pkg ) throws IOException {
        println("package "+pkg.name()+" {");
        indent++;
        dumpChildren(pkg);
        indent--;
        println("}");
    }
    
    private void dumpChildren( JClassContainer cont ) throws IOException {
        Iterator itr = cont.classes();
        while(itr.hasNext()) {
            JDefinedClass cls = (JDefinedClass)itr.next();
            ClassOutline ci = classSet.get(cls);
            if(ci!=null)
                dump(ci);
        }
    }
    
    private void dump( ClassOutline ci ) throws IOException {
        JDefinedClass cls = ci.implClass;

        StringBuilder buf = new StringBuilder();
        buf.append("interface ");
        buf.append(cls.name());
        
        boolean first=true;
        Iterator itr = cls._implements();
        while(itr.hasNext()) {
            if(first) {
                buf.append(" extends ");
                first=false;
            } else {
                buf.append(", ");
            }
            buf.append( printName((JClass)itr.next()) );
        }
        buf.append(" {");
        println(buf.toString());
        indent++;
        
        // dump the field
        for( FieldOutline fo : ci.getDeclaredFields() ) {
            String type = printName(fo.getRawType());
            println(type+' '+fo.getPropertyInfo().getName(true)+';');
        }
        
        dumpChildren(cls);
        
        indent--;
        println("}");
    }
    
    /** Get the display name of a type. */
    private String printName( JType t ) {
        String name = t.fullName();
        if(name.startsWith("java.lang."))
            name = name.substring(10);  // chop off the package name
        return name;
    }
}