/*

 * Copyright (c) 2003, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.tools.doclets.internal.toolkit.builders;

import java.io.*;

import java.lang.reflect.*;

import java.util.*;

import com.sun.tools.doclets.internal.toolkit.*;

import com.sun.tools.doclets.internal.toolkit.util.*;

/**

 * The superclass for all builders.  A builder is a class that provides

 * the structure and content of API documentation.  A builder is completely

 * doclet independent which means that any doclet can use builders to

 * construct documentation, as long as it impelements the appropriate

 * writer interfaces.  For example, if a doclet wanted to use

 * {@link ConstantsSummaryBuilder} to build a constant summary, all it has to

 * do is implement the ConstantsSummaryWriter interface and pass it to the

 * builder using a WriterFactory.

 *

 *  <p><b>This is NOT part of any supported API.

 *  If you write code that depends on this, you do so at your own risk.

 *  This code and its internal interfaces are subject to change or

 *  deletion without notice.</b>

 *

 * @author Jamie Ho

 * @since 1.5

 */

public abstract class AbstractBuilder {

    public static class Context {

        /**

         * The configuration used in this run of the doclet.

         */

        final Configuration configuration;

        /**

         * Keep track of which packages we have seen for

         * efficiency purposes.  We don't want to copy the

         * doc files multiple times for a single package.

         */

        /**

         * Shared parser for the builder XML file

         */

        final LayoutParser layoutParser;

        Context(Configuration configuration,

                LayoutParser layoutParser) {

            this.configuration = configuration;

            this.containingPackagesSeen = containingPackagesSeen;

            this.layoutParser = layoutParser;

        }

    }

    /**

     * The configuration used in this run of the doclet.

     */

    protected final Configuration configuration;

    /**

     * Keep track of which packages we have seen for

     * efficiency purposes.  We don't want to copy the

     * doc files multiple times for a single package.

     */

    protected final LayoutParser layoutParser;

    /**

     * True if we want to print debug output.

     */

    protected static final boolean DEBUG = false;

    /**

     * Construct a Builder.

     * @param configuration the configuration used in this run

     *        of the doclet.

     */

    public AbstractBuilder(Context c) {

        this.configuration = c.configuration;

        this.containingPackagesSeen = c.containingPackagesSeen;

        this.layoutParser = c.layoutParser;

    }

    /**

     * Return the name of this builder.

     *

     * @return the name of the builder.

     */

    public abstract String getName();

    /**

     * Build the documentation.

     *

     * @throws IOException there was a problem writing the output.

     */

    public abstract void build() throws IOException;

    /**

     * Build the documentation, as specified by the given XML element.

     *

     * @param node the XML element that specifies which component to document.

     * @param contentTree content tree to which the documentation will be added

     */

    protected void build(XMLNode node, Content contentTree) {

        String component = node.name;

        try {

            invokeMethod("build" + component,

                    new Class<?>[]{XMLNode.class, Content.class},

                    new Object[]{node, contentTree});

        } catch (NoSuchMethodException e) {

            e.printStackTrace();

            configuration.root.printError("Unknown element: " + component);

            throw new DocletAbortException(e);

        } catch (InvocationTargetException e) {

            throw new DocletAbortException(e.getCause());

        } catch (Exception e) {

            e.printStackTrace();

            configuration.root.printError("Exception " +

                    e.getClass().getName() +

                    " thrown while processing element: " + component);

            throw new DocletAbortException(e);

        }

    }

    /**

     * Build the documentation, as specified by the children of the given XML element.

     *

     * @param node the XML element that specifies which components to document.

     * @param contentTree content tree to which the documentation will be added

     */

    protected void buildChildren(XMLNode node, Content contentTree) {

        for (XMLNode child : node.children)

            build(child, contentTree);

    }

    /**

     * Given the name and parameters, invoke the method in the builder.  This

     * method is required to invoke the appropriate build method as instructed

     * by the builder XML file.

     *

     * @param methodName   the name of the method that we would like to invoke.

     * @param paramClasses the types for each parameter.

     * @param params       the parameters of the method.

     */

    protected void invokeMethod(String methodName, Class<?>[] paramClasses,

            Object[] params)

    throws Exception {

        if (DEBUG) {

            configuration.root.printError("DEBUG: " + this.getClass().getName() + "." + methodName);

        }

        Method method = this.getClass().getMethod(methodName, paramClasses);

        method.invoke(this, params);

    }

}