/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * questions.
 */

package build.tools.jdwpgen;

import java.util.*;
import java.io.*;

class AltNode extends AbstractGroupNode implements TypeNode {

    SelectNode select = null;

    void constrain(Context ctx) {
        super.constrain(ctx);

        if (!(nameNode instanceof NameValueNode)) {
            error("Alt name must have value: " + nameNode);
        }
        if (parent instanceof SelectNode) {
            select = (SelectNode)parent;
        } else {
            error("Alt must be in Select");
        }
    }

    void document(PrintWriter writer) {
        docRowStart(writer);
        writer.println("<td colspan=" +
                       (maxStructIndent - structIndent + 1) + ">");
        writer.println("Case " + nameNode.name + " - if <i>" +
                       ((SelectNode)parent).typeNode.name +
                       "</i> is " + nameNode.value() + ":");
        writer.println("<td>" + comment() + "&nbsp;");
        ++structIndent;
        super.document(writer);
        --structIndent;
    }

    String javaClassImplements() {
        return " extends " + select.commonBaseClass();
    }

    void genJavaClassSpecifics(PrintWriter writer, int depth) {
        indent(writer, depth);
        writer.print("static final " + select.typeNode.javaType());
        writer.println(" ALT_ID = " + nameNode.value() + ";");
        if (context.isWritingCommand()) {
            genJavaCreateMethod(writer, depth);
        } else {
            indent(writer, depth);
            writer.println(select.typeNode.javaParam() + "() {");
            indent(writer, depth+1);
            writer.println("return ALT_ID;");
            indent(writer, depth);
            writer.println("}");
        }
        super.genJavaClassSpecifics(writer, depth);
    }

    void genJavaWriteMethod(PrintWriter writer, int depth) {
        genJavaWriteMethod(writer, depth, "");
    }

    void genJavaReadsSelectCase(PrintWriter writer, int depth, String common) {
        indent(writer, depth);
        writer.println("case " + nameNode.value() + ":");
        indent(writer, depth+1);
        writer.println(common + " = new " + name + "(vm, ps);");
        indent(writer, depth+1);
        writer.println("break;");
    }

    void genJavaCreateMethod(PrintWriter writer, int depth) {
        indent(writer, depth);
        writer.print("static " + select.name() + " create(");
        writer.print(javaParams());
        writer.println(") {");
        indent(writer, depth+1);
        writer.print("return new " + select.name() + "(");
        writer.print("ALT_ID, new " + javaClassName() + "(");
        for (Iterator<Node> it = components.iterator(); it.hasNext();) {
            TypeNode tn = (TypeNode)it.next();
            writer.print(tn.name());
            if (it.hasNext()) {
                writer.print(", ");
            }
        }
        writer.println("));");
        indent(writer, depth);
        writer.println("}");
    }

}