/*

 * 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

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 */

package com.sun.tools.javap;

import com.sun.tools.classfile.Annotation;

import com.sun.tools.classfile.Annotation.Annotation_element_value;

import com.sun.tools.classfile.Annotation.Array_element_value;

import com.sun.tools.classfile.Annotation.Class_element_value;

import com.sun.tools.classfile.Annotation.Enum_element_value;

import com.sun.tools.classfile.Annotation.Primitive_element_value;

import com.sun.tools.classfile.ConstantPool;

import com.sun.tools.classfile.ConstantPoolException;

import com.sun.tools.classfile.Descriptor;

import com.sun.tools.classfile.Descriptor.InvalidDescriptor;

/**

 *  A writer for writing annotations as text.

 *

 *  <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>

 */

public class AnnotationWriter extends BasicWriter {

    static AnnotationWriter instance(Context context) {

        AnnotationWriter instance = context.get(AnnotationWriter.class);

        if (instance == null)

            instance = new AnnotationWriter(context);

        return instance;

    }

    protected AnnotationWriter(Context context) {

        super(context);

        classWriter = ClassWriter.instance(context);

        constantWriter = ConstantWriter.instance(context);

    }

    public void write(Annotation annot) {

        write(annot, false);

    }

    public void write(Annotation annot, boolean resolveIndices) {

        writeDescriptor(annot.type_index, resolveIndices);

        boolean showParens = annot.num_element_value_pairs > 0 || !resolveIndices;

        if (showParens)

            print("(");

        for (int i = 0; i < annot.num_element_value_pairs; i++) {

            if (i > 0)

                print(",");

            write(annot.element_value_pairs[i], resolveIndices);

        }

        if (showParens)

            print(")");

    }

    public void write(Annotation.element_value_pair pair) {

        write(pair, false);

    }

    public void write(Annotation.element_value_pair pair, boolean resolveIndices) {

        writeIndex(pair.element_name_index, resolveIndices);

        print("=");

        write(pair.value, resolveIndices);

    }

    public void write(Annotation.element_value value) {

        write(value, false);

    }

    public void write(Annotation.element_value value, boolean resolveIndices) {

        ev_writer.write(value, resolveIndices);

    }

    private void writeDescriptor(int index, boolean resolveIndices) {

        if (resolveIndices) {

            try {

                ConstantPool constant_pool = classWriter.getClassFile().constant_pool;

                Descriptor d = new Descriptor(index);

                print(d.getFieldType(constant_pool));

                return;

            } catch (ConstantPoolException ignore) {

            } catch (InvalidDescriptor ignore) {

            }

        }

        print("#" + index);

    }

    private void writeIndex(int index, boolean resolveIndices) {

        if (resolveIndices) {

            print(constantWriter.stringValue(index));

        } else

            print("#" + index);

    }

    element_value_Writer ev_writer = new element_value_Writer();

    class element_value_Writer implements Annotation.element_value.Visitor<Void,Boolean> {

        public void write(Annotation.element_value value, boolean resolveIndices) {

            value.accept(this, resolveIndices);

        }

        public Void visitPrimitive(Primitive_element_value ev, Boolean resolveIndices) {

            if (resolveIndices)

                writeIndex(ev.const_value_index, resolveIndices);

            else

                print(((char) ev.tag) + "#" + ev.const_value_index);

            return null;

        }

        public Void visitEnum(Enum_element_value ev, Boolean resolveIndices) {

            if (resolveIndices) {

                writeIndex(ev.type_name_index, resolveIndices);

                print(".");

                writeIndex(ev.const_name_index, resolveIndices);

            } else

                print(((char) ev.tag) + "#" + ev.type_name_index + ".#" + ev.const_name_index);

            return null;

        }

        public Void visitClass(Class_element_value ev, Boolean resolveIndices) {

            if (resolveIndices) {

                writeIndex(ev.class_info_index, resolveIndices);

                print(".class");

            } else

                print(((char) ev.tag) + "#" + ev.class_info_index);

            return null;

        }

        public Void visitAnnotation(Annotation_element_value ev, Boolean resolveIndices) {

            print((char) ev.tag);

            AnnotationWriter.this.write(ev.annotation_value, resolveIndices);

            return null;

        }

        public Void visitArray(Array_element_value ev, Boolean resolveIndices) {

            print("[");

            for (int i = 0; i < ev.num_values; i++) {

                if (i > 0)

                    print(",");

                write(ev.values[i], resolveIndices);

            }

            print("]");

            return null;

        }

    }

    private ClassWriter classWriter;

    private ConstantWriter constantWriter;

}