ByteArrayAdapter.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#ifndef _DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_
#define _DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_

#include <decaf/lang/exceptions/InvalidStateException.h>
#include <decaf/lang/exceptions/IllegalArgumentException.h>
#include <decaf/lang/exceptions/IndexOutOfBoundsException.h>
#include <decaf/lang/exceptions/NullPointerException.h>
#include <decaf/nio/BufferUnderflowException.h>
#include <decaf/nio/BufferOverflowException.h>

namespace decaf {
namespace internal {
namespace util {

    class DECAF_API ByteArrayAdapter {
    private:

        // Used to allow this adapter to view its array as the different
        // types it supports
        union Array {
            unsigned char* bytes;
            char* chars;
            short* shorts;
            int* ints;
            long long* longs;
            float* floats;
            double* doubles;
        };

        // Buffer to read and write to, may be shared with other instances.
        Array array;

        // Size of the Buffer
        int size;

        // Whether this object owns the buffer
        bool own;

    public:

        ByteArrayAdapter(int size);

        ByteArrayAdapter(unsigned char* array, int size, bool own = false);

        ByteArrayAdapter(char* array, int size, bool own = false);

        ByteArrayAdapter(double* array, int size, bool own = false);

        ByteArrayAdapter(float* array, int size, bool own = false);

        ByteArrayAdapter(long long* array, int size, bool own = false);

        ByteArrayAdapter(int* array, int size, bool own = false);

        ByteArrayAdapter(short* array, int size, bool own = false);

        virtual ~ByteArrayAdapter();

        virtual int getCapacity() const {
            return this->size;
        }

        virtual int getCharCapacity() const {
            return this->size;
        }

        virtual int getDoubleCapacity() const {
            return this->size / (int) sizeof(double);
        }

        virtual int getFloatCapacity() const {
            return this->size / (int) sizeof(float);
        }

        virtual int getLongCapacity() const {
            return this->size / (int) sizeof(long long);
        }

        virtual int getIntCapacity() const {
            return this->size / (int) sizeof(int);
        }

        virtual int getShortCapacity() const {
            return this->size / (int) sizeof(short);
        }

        virtual unsigned char* getByteArray() {
            return this->array.bytes;
        }

        virtual char* getCharArray() {
            return this->array.chars;
        }

        virtual short* getShortArray() {
            return this->array.shorts;
        }

        virtual int* getIntArray() {
            return this->array.ints;
        }

        virtual long long* getLongArray() {
            return this->array.longs;
        }

        virtual double* getDoubleArray() {
            return this->array.doubles;
        }

        virtual float* getFloatArray() {
            return this->array.floats;
        }

        virtual void read(unsigned char* buffer, int size, int offset, int length) const;

        virtual void write(unsigned char* buffer, int size, int offset, int length);

        virtual void resize(int size);

        virtual void clear();

        unsigned char& operator[](int index);
        const unsigned char& operator[](int index) const;

        virtual unsigned char get(int index) const;

        virtual char getChar(int index) const;

        virtual double getDouble(int index) const;

        virtual double getDoubleAt(int index) const;

        virtual float getFloat(int index) const;

        virtual float getFloatAt(int index) const;

        virtual long long getLong(int index) const;

        virtual long long getLongAt(int index) const;

        virtual int getInt(int index) const;

        virtual int getIntAt(int index) const;

        virtual short getShort(int index) const;

        virtual short getShortAt(int index) const;

        virtual ByteArrayAdapter& put(int index, unsigned char value);

        virtual ByteArrayAdapter& putChar(int index, char value);

        virtual ByteArrayAdapter& putDouble(int index, double value);

        virtual ByteArrayAdapter& putDoubleAt(int index, double value);

        virtual ByteArrayAdapter& putFloat(int index, float value);

        virtual ByteArrayAdapter& putFloatAt(int index, float value);

        virtual ByteArrayAdapter& putLong(int index, long long value);

        virtual ByteArrayAdapter& putLongAt(int index, long long value);

        virtual ByteArrayAdapter& putInt(int index, int value);

        virtual ByteArrayAdapter& putIntAt(int index, int value);

        virtual ByteArrayAdapter& putShort(int index, short value);

        virtual ByteArrayAdapter& putShortAt(int index, short value);

    private:

        void initialize(unsigned char* buffer, int size, bool own);

    };

}}}

#endif /*_DECAF_INTERNAL_UTIL_BYTEARRAYADAPTER_H_*/