/*

 * Copyright (c) 2002, 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 org.apidesign.javap;

import java.io.*;

/**

 * Strores field data informastion.

 *

 * @author  Sucheta Dambalkar (Adopted code from jdis)

 */

public class FieldData implements RuntimeConstants  {

    ClassData cls;

    int access;

    int name_index;

    int descriptor_index;

    int attributes_count;

    int value_cpx=0;

    boolean isSynthetic=false;

    boolean isDeprecated=false;

    Vector attrs;

    public FieldData(ClassData cls){

        this.cls=cls;

    }

    /**

     * Read and store field info.

     */

    public void read(DataInputStream in) throws IOException {

        access = in.readUnsignedShort();

        name_index = in.readUnsignedShort();

        descriptor_index = in.readUnsignedShort();

        // Read the attributes

        int attributes_count = in.readUnsignedShort();

        attrs=new Vector(attributes_count);

        for (int i = 0; i < attributes_count; i++) {

            int attr_name_index=in.readUnsignedShort();

            if (cls.getTag(attr_name_index)!=CONSTANT_UTF8) continue;

            String attr_name=cls.getString(attr_name_index);

            if (attr_name.equals("ConstantValue")){

                if (in.readInt()!=2)

                    throw new ClassFormatError("invalid ConstantValue attr length");

                value_cpx=in.readUnsignedShort();

                AttrData attr=new AttrData(cls);

                attr.read(attr_name_index);

                attrs.addElement(attr);

            } else if (attr_name.equals("Synthetic")){

                if (in.readInt()!=0)

                    throw new ClassFormatError("invalid Synthetic attr length");

                isSynthetic=true;

                AttrData attr=new AttrData(cls);

                attr.read(attr_name_index);

                attrs.addElement(attr);

            } else if (attr_name.equals("Deprecated")){

                if (in.readInt()!=0)

                    throw new ClassFormatError("invalid Synthetic attr length");

                isDeprecated = true;

                AttrData attr=new AttrData(cls);

                attr.read(attr_name_index);

                attrs.addElement(attr);

            } else {

                AttrData attr=new AttrData(cls);

                attr.read(attr_name_index, in);

                attrs.addElement(attr);

            }

        }

    }  // end read

    public boolean isStatic() {

        return (access & ACC_STATIC) != 0;

    }

    /**

     * Returns access of a field.

     */

    public String[] getAccess(){

        Vector v = new Vector();

        if ((access & ACC_PUBLIC)   !=0) v.addElement("public");

        if ((access & ACC_PRIVATE)   !=0) v.addElement("private");

        if ((access & ACC_PROTECTED)   !=0) v.addElement("protected");

        if ((access & ACC_STATIC)   !=0) v.addElement("static");

        if ((access & ACC_FINAL)    !=0) v.addElement("final");

        if ((access & ACC_VOLATILE) !=0) v.addElement("volatile");

        if ((access & ACC_TRANSIENT) !=0) v.addElement("transient");

        String[] accflags = new String[v.size()];

        v.copyInto(accflags);

        return accflags;

    }

    /**

     * Returns name of a field.

     */

    public String getName(){

        return cls.getStringValue(name_index);

    }

    /**

     * Returns internal signature of a field

     */

    public String getInternalSig(){

        return cls.getStringValue(descriptor_index);

    }

    /**

     * Returns true if field is synthetic.

     */

    public boolean isSynthetic(){

        return isSynthetic;

    }

    /**

     * Returns true if field is deprecated.

     */

    public boolean isDeprecated(){

        return isDeprecated;

    }

    /**

     * Returns index of constant value in cpool.

     */

    public int getConstantValueIndex(){

        return (value_cpx);

    }

    /**

     * Returns list of attributes of field.

     */

    public Vector getAttributes(){

        return attrs;

    }

    public byte[] findAnnotationData(boolean classRetention) {

        String n = classRetention ?

            "RuntimeInvisibleAnnotations" : // NOI18N

            "RuntimeVisibleAnnotations"; // NOI18N

        AttrData[] arr = new AttrData[attrs.size()];

        attrs.copyInto(arr);

        return ClassData.findAttr(n, arr);

    }

}