/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
 * ===========================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END====================================================
 *
 */

package org.onap.aaf.misc.rosetta.marshal;

import javax.xml.datatype.XMLGregorianCalendar;

import org.onap.aaf.misc.env.util.Chrono;

/**
 * We make these objects instead of static functions so they can be passed into
 * FieldArray.
 *
 * @author Jonathan
 *
 * @param <T>
 */
public abstract class DataWriter<T> {
    public abstract boolean write(T t, StringBuilder sb);

    public final static DataWriter<String> STRING = new DataWriter<String>() {
        @Override
        public boolean write(String s, StringBuilder sb) {
            sb.append(s);
            return true;
        }
    };

    public final static DataWriter<Integer> INTEGER = new DataWriter<Integer>() {
        @Override
        public boolean write(Integer i, StringBuilder sb) {
            sb.append(i);
            return false;
        }
    };

    public final static DataWriter<Long> LONG = new DataWriter<Long>() {
        @Override
        public boolean write(Long t, StringBuilder sb) {
            sb.append(t);
            return false;
        }
    };

    public final static DataWriter<Byte> BYTE = new DataWriter<Byte>() {
        @Override
        public boolean write(Byte t, StringBuilder sb) {
            sb.append(t);
            return false;
        }
    };

    public final static DataWriter<Character> CHAR = new DataWriter<Character>() {
        @Override
        public boolean write(Character t, StringBuilder sb) {
            sb.append(t);
            return true;
        }
    };

    public final static DataWriter<Boolean> BOOL = new DataWriter<Boolean>() {
        @Override
        public boolean write(Boolean t, StringBuilder sb) {
            sb.append(t);
            return true;
        }
    };


    /*
    public final static DataWriter<byte[]> BYTE_ARRAY = new DataWriter<byte[]>() {
        @Override
        public boolean write(byte[] ba, StringBuilder sb) {
            ByteArrayInputStream bais = new ByteArrayInputStream(ba);
            StringBuilderOutputStream sbos = new StringBuilderOutputStream(sb);
//            try {
                //TODO find Base64
//                Symm.base64noSplit().encode(bais, sbos);
//            } catch (IOException e) {
//                // leave blank
//            }
            return true;
        }

    };
    */

    public final static DataWriter<XMLGregorianCalendar> DATE = new DataWriter<XMLGregorianCalendar>() {
        @Override
        public boolean write(XMLGregorianCalendar t, StringBuilder sb) {
            sb.append(Chrono.dateOnlyStamp(t));
            return true;
        }
    };

    public final static DataWriter<XMLGregorianCalendar> DATE_TIME = new DataWriter<XMLGregorianCalendar>() {
        @Override
        public boolean write(XMLGregorianCalendar t, StringBuilder sb) {
            sb.append(Chrono.dateTime(t));
            return true;
        }
    };

    private static final char[] chars="0123456789ABCDEF".toCharArray();
    public final static DataWriter<byte[]> HEX_BINARY = new DataWriter<byte[]>() {
        @Override
        public boolean write(byte[] ba, StringBuilder sb) {
            // FYI, doing this because don't want intermediate
            // String in "HexString" or the processing in
            // "String.format"
            //sb.append("0x");
            for (int i=0;i<ba.length;++i) {
                byte b = ba[i];
                sb.append(chars[((b&0xF0)>>4)]);
                sb.append(chars[b&0xF]);
            }
            return true;
        }
    };

}