/*
* 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.
*/
package java.nio;
import org.apache.harmony.luni.platform.Endianness;
/**
* A buffer for bytes.
* <p>
* A byte buffer can be created in either one of the following ways:
* </p>
* <ul>
* <li>{@link #allocate(int) Allocate} a new byte array and create a buffer
* based on it;</li>
* <li>{@link #allocateDirect(int) Allocate} a memory block and create a direct
* buffer based on it;</li>
* <li>{@link #wrap(byte[]) Wrap} an existing byte array to create a new
* buffer.</li>
* </ul>
* @since Android 1.0
*/
public abstract class ByteBuffer extends Buffer implements Comparable<ByteBuffer> {
/**
* Creates a byte buffer based on a newly allocated byte array.
*
* @param capacity
* the capacity of the new buffer
* @return the created byte buffer.
* @throws IllegalArgumentException
* if {@code capacity < 0}.
* @since Android 1.0
*/
public static ByteBuffer allocate(int capacity) {
if (capacity < 0) {
throw new IllegalArgumentException();
}
return BufferFactory.newByteBuffer(capacity);
}
/**
* Creates a direct byte buffer based on a newly allocated memory block.
*
* @param capacity
* the capacity of the new buffer
* @return the created byte buffer.
* @throws IllegalArgumentException
* if {@code capacity < 0}.
* @since Android 1.0
*/
public static ByteBuffer allocateDirect(int capacity) {
if (capacity < 0) {
throw new IllegalArgumentException();
}
return BufferFactory.newDirectByteBuffer(capacity);
}
/**
* Creates a new byte buffer by wrapping the given byte array.
* <p>
* Calling this method has the same effect as
* {@code wrap(array, 0, array.length)}.
* </p>
*
* @param array
* the byte array which the new buffer will be based on
* @return the created byte buffer.
* @since Android 1.0
*/
public static ByteBuffer wrap(byte[] array) {
return BufferFactory.newByteBuffer(array);
}
/**
* Creates a new byte buffer by wrapping the given byte array.
* <p>
* The new buffer's position will be {@code start}, limit will be
* {@code start + len}, capacity will be the length of the array.
* </p>
*
* @param array
* the byte array which the new buffer will be based on.
* @param start
* the start index, must not be negative and not greater than
* {@code array.length}.
* @param len
* the length, must not be negative and not greater than
* {@code array.length - start}.
* @return the created byte buffer.
* @exception IndexOutOfBoundsException
* if either {@code start} or {@code len} is invalid.
* @since Android 1.0
*/
public static ByteBuffer wrap(byte[] array, int start, int len) {
int length = array.length;
if ((start < 0) || (len < 0) || ((long) start + (long) len > length)) {
throw new IndexOutOfBoundsException();
}
ByteBuffer buf = BufferFactory.newByteBuffer(array);
buf.position = start;
buf.limit = start + len;
return buf;
}
/**
* The byte order of this buffer, default is {@code BIG_ENDIAN}.
*/
Endianness order = Endianness.BIG_ENDIAN;
/**
* Constructs a {@code ByteBuffer} with given capacity.
*
* @param capacity
* the capacity of the buffer.
* @since Android 1.0
*/
ByteBuffer(int capacity) {
super(capacity);
// BEGIN android-added
_elementSizeShift = 0;
// END android-added
}
/**
* Returns the byte array which this buffer is based on, if there is one.
*
* @return the byte array which this buffer is based on.
* @exception ReadOnlyBufferException
* if this buffer is based on a read-only array.
* @exception UnsupportedOperationException
* if this buffer is not based on an array.
* @since Android 1.0
*/
public final byte[] array() {
return protectedArray();
}
/**
* Returns the offset of the byte array which this buffer is based on, if
* there is one.
* <p>
* The offset is the index of the array which corresponds to the zero
* position of the buffer.
* </p>
*
* @return the offset of the byte array which this buffer is based on.
* @exception ReadOnlyBufferException
* if this buffer is based on a read-only array.
* @exception UnsupportedOperationException
* if this buffer is not based on an array.
* @since Android 1.0
*/
public final int arrayOffset() {
return protectedArrayOffset();
}
// BEGIN android-added
@Override
Object _array() {
if (hasArray()) {
return array();
}
return null;
}
@Override
int _arrayOffset() {
if (hasArray()) {
return arrayOffset();
}
return 0;
}
// END android-added
/**
* Returns a char buffer which is based on the remaining content of this
* byte buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by two, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a char buffer which is based on the content of this byte buffer.
* @since Android 1.0
*/
public abstract CharBuffer asCharBuffer();
/**
* Returns a double buffer which is based on the remaining content of this
* byte buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by eight, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a double buffer which is based on the content of this byte
* buffer.
* @since Android 1.0
*/
public abstract DoubleBuffer asDoubleBuffer();
/**
* Returns a float buffer which is based on the remaining content of this
* byte buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by four, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a float buffer which is based on the content of this byte buffer.
* @since Android 1.0
*/
public abstract FloatBuffer asFloatBuffer();
/**
* Returns a int buffer which is based on the remaining content of this byte
* buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by four, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a int buffer which is based on the content of this byte buffer.
* @since Android 1.0
*/
public abstract IntBuffer asIntBuffer();
/**
* Returns a long buffer which is based on the remaining content of this
* byte buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by eight, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a long buffer which is based on the content of this byte buffer.
* @since Android 1.0
*/
public abstract LongBuffer asLongBuffer();
/**
* Returns a read-only buffer that shares its content with this buffer.
* <p>
* The returned buffer is guaranteed to be a new instance, even if this
* buffer is read-only itself. The new buffer's position, limit, capacity
* and mark are the same as this buffer.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means this
* buffer's change of content will be visible to the new buffer. The two
* buffer's position, limit and mark are independent.
* </p>
*
* @return a read-only version of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer asReadOnlyBuffer();
/**
* Returns a short buffer which is based on the remaining content of this
* byte buffer.
* <p>
* The new buffer's position is zero, its limit and capacity is the number
* of remaining bytes divided by two, and its mark is not set. The new
* buffer's read-only property and byte order are the same as this buffer's.
* The new buffer is direct if this byte buffer is direct.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a short buffer which is based on the content of this byte buffer.
* @since Android 1.0
*/
public abstract ShortBuffer asShortBuffer();
/**
* Compacts this byte buffer.
* <p>
* The remaining bytes will be moved to the head of the
* buffer, starting from position zero. Then the position is set to
* {@code remaining()}; the limit is set to capacity; the mark is
* cleared.
* </p>
*
* @return this buffer.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer compact();
/**
* Compares the remaining bytes of this buffer to another byte buffer's
* remaining bytes.
*
* @param otherBuffer
* another byte buffer.
* @return a negative value if this is less than {@code other}; 0 if this
* equals to {@code other}; a positive value if this is greater
* than {@code other}.
* @exception ClassCastException
* if {@code other} is not a byte buffer.
* @since Android 1.0
*/
public int compareTo(ByteBuffer otherBuffer) {
int compareRemaining = (remaining() < otherBuffer.remaining()) ? remaining()
: otherBuffer.remaining();
int thisPos = position;
int otherPos = otherBuffer.position;
byte thisByte, otherByte;
while (compareRemaining > 0) {
thisByte = get(thisPos);
otherByte = otherBuffer.get(otherPos);
if (thisByte != otherByte) {
return thisByte < otherByte ? -1 : 1;
}
thisPos++;
otherPos++;
compareRemaining--;
}
return remaining() - otherBuffer.remaining();
}
/**
* Returns a duplicated buffer that shares its content with this buffer.
* <p>
* The duplicated buffer's position, limit, capacity and mark are the same
* as this buffer's. The duplicated buffer's read-only property and byte
* order are the same as this buffer's too.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a duplicated buffer that shares its content with this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer duplicate();
/**
* Checks whether this byte buffer is equal to another object.
* <p>
* If {@code other} is not a byte buffer then {@code false} is returned. Two
* byte buffers are equal if and only if their remaining bytes are exactly
* the same. Position, limit, capacity and mark are not considered.
* </p>
*
* @param other
* the object to compare with this byte buffer.
* @return {@code true} if this byte buffer is equal to {@code other},
* {@code false} otherwise.
* @since Android 1.0
*/
public boolean equals(Object other) {
if (!(other instanceof ByteBuffer)) {
return false;
}
ByteBuffer otherBuffer = (ByteBuffer) other;
if (remaining() != otherBuffer.remaining()) {
return false;
}
int myPosition = position;
int otherPosition = otherBuffer.position;
boolean equalSoFar = true;
while (equalSoFar && (myPosition < limit)) {
equalSoFar = get(myPosition++) == otherBuffer.get(otherPosition++);
}
return equalSoFar;
}
/**
* Returns the byte at the current position and increases the position by 1.
*
* @return the byte at the current position.
* @exception BufferUnderflowException
* if the position is equal or greater than limit.
* @since Android 1.0
*/
public abstract byte get();
/**
* Reads bytes from the current position into the specified byte array and
* increases the position by the number of bytes read.
* <p>
* Calling this method has the same effect as
* {@code get(dest, 0, dest.length)}.
* </p>
*
* @param dest
* the destination byte array.
* @return this buffer.
* @exception BufferUnderflowException
* if {@code dest.length} is greater than {@code remaining()}.
* @since Android 1.0
*/
public ByteBuffer get(byte[] dest) {
return get(dest, 0, dest.length);
}
/**
* Reads bytes from the current position into the specified byte array,
* starting at the specified offset, and increases the position by the
* number of bytes read.
*
* @param dest
* the target byte array.
* @param off
* the offset of the byte array, must not be negative and
* not greater than {@code dest.length}.
* @param len
* the number of bytes to read, must not be negative and not
* greater than {@code dest.length - off}
* @return this buffer.
* @exception IndexOutOfBoundsException
* if either {@code off} or {@code len} is invalid.
* @exception BufferUnderflowException
* if {@code len} is greater than {@code remaining()}.
* @since Android 1.0
*/
public ByteBuffer get(byte[] dest, int off, int len) {
int length = dest.length;
if ((off < 0 ) || (len < 0) || ((long)off + (long)len > length)) {
throw new IndexOutOfBoundsException();
}
if (len > remaining()) {
throw new BufferUnderflowException();
}
for (int i = off; i < off + len; i++) {
dest[i] = get();
}
return this;
}
/**
* Returns the byte at the specified index and does not change the position.
*
* @param index
* the index, must not be negative and less than limit.
* @return the byte at the specified index.
* @exception IndexOutOfBoundsException
* if index is invalid.
* @since Android 1.0
*/
public abstract byte get(int index);
/**
* Returns the char at the current position and increases the position by 2.
* <p>
* The 2 bytes starting at the current position are composed into a char
* according to the current byte order and returned.
* </p>
*
* @return the char at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 2}.
* @since Android 1.0
*/
public abstract char getChar();
/**
* Returns the char at the specified index.
* <p>
* The 2 bytes starting from the specified index are composed into a char
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 2}.
* @return the char at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract char getChar(int index);
/**
* Returns the double at the current position and increases the position by
* 8.
* <p>
* The 8 bytes starting from the current position are composed into a double
* according to the current byte order and returned.
* </p>
*
* @return the double at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 8}.
* @since Android 1.0
*/
public abstract double getDouble();
/**
* Returns the double at the specified index.
* <p>
* The 8 bytes starting at the specified index are composed into a double
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 8}.
* @return the double at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract double getDouble(int index);
/**
* Returns the float at the current position and increases the position by
* 4.
* <p>
* The 4 bytes starting at the current position are composed into a float
* according to the current byte order and returned.
* </p>
*
* @return the float at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 4}.
* @since Android 1.0
*/
public abstract float getFloat();
/**
* Returns the float at the specified index.
* <p>
* The 4 bytes starting at the specified index are composed into a float
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 4}.
* @return the float at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract float getFloat(int index);
/**
* Returns the int at the current position and increases the position by 4.
* <p>
* The 4 bytes starting at the current position are composed into a int
* according to the current byte order and returned.
* </p>
*
* @return the int at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 4}.
* @since Android 1.0
*/
public abstract int getInt();
/**
* Returns the int at the specified index.
* <p>
* The 4 bytes starting at the specified index are composed into a int
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 4}.
* @return the int at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract int getInt(int index);
/**
* Returns the long at the current position and increases the position by 8.
* <p>
* The 8 bytes starting at the current position are composed into a long
* according to the current byte order and returned.
* </p>
*
* @return the long at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 8}.
* @since Android 1.0
*/
public abstract long getLong();
/**
* Returns the long at the specified index.
* <p>
* The 8 bytes starting at the specified index are composed into a long
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 8}.
* @return the long at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract long getLong(int index);
/**
* Returns the short at the current position and increases the position by 2.
* <p>
* The 2 bytes starting at the current position are composed into a short
* according to the current byte order and returned.
* </p>
*
* @return the short at the current position.
* @exception BufferUnderflowException
* if the position is greater than {@code limit - 2}.
* @since Android 1.0
*/
public abstract short getShort();
/**
* Returns the short at the specified index.
* <p>
* The 2 bytes starting at the specified index are composed into a short
* according to the current byte order and returned. The position is not
* changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 2}.
* @return the short at the specified index.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @since Android 1.0
*/
public abstract short getShort(int index);
/**
* Indicates whether this buffer is based on a byte array and provides
* read/write access.
*
* @return {@code true} if this buffer is based on a byte array and provides
* read/write access, {@code false} otherwise.
* @since Android 1.0
*/
public final boolean hasArray() {
return protectedHasArray();
}
/**
* Calculates this buffer's hash code from the remaining chars. The
* position, limit, capacity and mark don't affect the hash code.
*
* @return the hash code calculated from the remaining bytes.
* @since Android 1.0
*/
public int hashCode() {
int myPosition = position;
int hash = 0;
while (myPosition < limit) {
hash = hash + get(myPosition++);
}
return hash;
}
/**
* Indicates whether this buffer is direct.
*
* @return {@code true} if this buffer is direct, {@code false} otherwise.
* @since Android 1.0
*/
public abstract boolean isDirect();
/**
* Returns the byte order used by this buffer when converting bytes from/to
* other primitive types.
* <p>
* The default byte order of byte buffer is always
* {@link ByteOrder#BIG_ENDIAN BIG_ENDIAN}
* </p>
*
* @return the byte order used by this buffer when converting bytes from/to
* other primitive types.
* @since Android 1.0
*/
public final ByteOrder order() {
return order == Endianness.BIG_ENDIAN ? ByteOrder.BIG_ENDIAN
: ByteOrder.LITTLE_ENDIAN;
}
/**
* Sets the byte order of this buffer.
*
* @param byteOrder
* the byte order to set. If {@code null} then the order
* will be {@link ByteOrder#LITTLE_ENDIAN LITTLE_ENDIAN}.
* @return this buffer.
* @see ByteOrder
* @since Android 1.0
*/
public final ByteBuffer order(ByteOrder byteOrder) {
return orderImpl(byteOrder);
}
ByteBuffer orderImpl(ByteOrder byteOrder) {
order = byteOrder == ByteOrder.BIG_ENDIAN ? Endianness.BIG_ENDIAN
: Endianness.LITTLE_ENDIAN;
return this;
}
/**
* Child class implements this method to realize {@code array()}.
*
* @see #array()
* @since Android 1.0
*/
abstract byte[] protectedArray();
/**
* Child class implements this method to realize {@code arrayOffset()}.
*
* @see #arrayOffset()
* @since Android 1.0
*/
abstract int protectedArrayOffset();
/**
* Child class implements this method to realize {@code hasArray()}.
*
* @see #hasArray()
* @since Android 1.0
*/
abstract boolean protectedHasArray();
/**
* Writes the given byte to the current position and increases the position
* by 1.
*
* @param b
* the byte to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is equal or greater than limit.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer put(byte b);
/**
* Writes bytes in the given byte array to the current position and
* increases the position by the number of bytes written.
* <p>
* Calling this method has the same effect as
* {@code put(src, 0, src.length)}.
* </p>
*
* @param src
* the source byte array.
* @return this buffer.
* @exception BufferOverflowException
* if {@code remaining()} is less than {@code src.length}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public final ByteBuffer put(byte[] src) {
return put(src, 0, src.length);
}
/**
* Writes bytes in the given byte array, starting from the specified offset,
* to the current position and increases the position by the number of bytes
* written.
*
* @param src
* the source byte array.
* @param off
* the offset of byte array, must not be negative and not greater
* than {@code src.length}.
* @param len
* the number of bytes to write, must not be negative and not
* greater than {@code src.length - off}.
* @return this buffer.
* @exception BufferOverflowException
* if {@code remaining()} is less than {@code len}.
* @exception IndexOutOfBoundsException
* if either {@code off} or {@code len} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public ByteBuffer put(byte[] src, int off, int len) {
int length = src.length;
if ((off < 0 ) || (len < 0) || ((long)off + (long)len > length)) {
throw new IndexOutOfBoundsException();
}
if (len > remaining()) {
throw new BufferOverflowException();
}
for (int i = off; i < off + len; i++) {
put(src[i]);
}
return this;
}
/**
* Writes all the remaining bytes of the {@code src} byte buffer to this
* buffer's current position, and increases both buffers' position by the
* number of bytes copied.
*
* @param src
* the source byte buffer.
* @return this buffer.
* @exception BufferOverflowException
* if {@code src.remaining()} is greater than this buffer's
* {@code remaining()}.
* @exception IllegalArgumentException
* if {@code src} is this buffer.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public ByteBuffer put(ByteBuffer src) {
if (src == this) {
throw new IllegalArgumentException();
}
if (src.remaining() > remaining()) {
throw new BufferOverflowException();
}
byte[] contents = new byte[src.remaining()];
src.get(contents);
put(contents);
return this;
}
/**
* Write a byte to the specified index of this buffer without changing the
* position.
*
* @param index
* the index, must not be negative and less than the limit.
* @param b
* the byte to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer put(int index, byte b);
/**
* Writes the given char to the current position and increases the position
* by 2.
* <p>
* The char is converted to bytes using the current byte order.
* </p>
*
* @param value
* the char to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 2}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putChar(char value);
/**
* Writes the given char to the specified index of this buffer.
* <p>
* The char is converted to bytes using the current byte order. The position
* is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 2}.
* @param value
* the char to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putChar(int index, char value);
/**
* Writes the given double to the current position and increases the position
* by 8.
* <p>
* The double is converted to bytes using the current byte order.
* </p>
*
* @param value
* the double to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 8}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putDouble(double value);
/**
* Writes the given double to the specified index of this buffer.
* <p>
* The double is converted to bytes using the current byte order. The
* position is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 8}.
* @param value
* the double to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putDouble(int index, double value);
/**
* Writes the given float to the current position and increases the position
* by 4.
* <p>
* The float is converted to bytes using the current byte order.
* </p>
*
* @param value
* the float to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 4}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putFloat(float value);
/**
* Writes the given float to the specified index of this buffer.
* <p>
* The float is converted to bytes using the current byte order. The
* position is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 4}.
* @param value
* the float to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putFloat(int index, float value);
/**
* Writes the given int to the current position and increases the position by
* 4.
* <p>
* The int is converted to bytes using the current byte order.
* </p>
*
* @param value
* the int to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 4}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putInt(int value);
/**
* Writes the given int to the specified index of this buffer.
* <p>
* The int is converted to bytes using the current byte order. The position
* is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 4}.
* @param value
* the int to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putInt(int index, int value);
/**
* Writes the given long to the current position and increases the position
* by 8.
* <p>
* The long is converted to bytes using the current byte order.
* </p>
*
* @param value
* the long to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 8}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putLong(long value);
/**
* Writes the given long to the specified index of this buffer.
* <p>
* The long is converted to bytes using the current byte order. The position
* is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 8}.
* @param value
* the long to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putLong(int index, long value);
/**
* Writes the given short to the current position and increases the position
* by 2.
* <p>
* The short is converted to bytes using the current byte order.
* </p>
*
* @param value
* the short to write.
* @return this buffer.
* @exception BufferOverflowException
* if position is greater than {@code limit - 2}.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putShort(short value);
/**
* Writes the given short to the specified index of this buffer.
* <p>
* The short is converted to bytes using the current byte order. The
* position is not changed.
* </p>
*
* @param index
* the index, must not be negative and equal or less than
* {@code limit - 2}.
* @param value
* the short to write.
* @return this buffer.
* @exception IndexOutOfBoundsException
* if {@code index} is invalid.
* @exception ReadOnlyBufferException
* if no changes may be made to the contents of this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer putShort(int index, short value);
/**
* Returns a sliced buffer that shares its content with this buffer.
* <p>
* The sliced buffer's capacity will be this buffer's
* {@code remaining()}, and it's zero position will correspond to
* this buffer's current position. The new buffer's position will be 0,
* limit will be its capacity, and its mark is cleared. The new buffer's
* read-only property and byte order are the same as this buffer's.
* </p>
* <p>
* The new buffer shares its content with this buffer, which means either
* buffer's change of content will be visible to the other. The two buffer's
* position, limit and mark are independent.
* </p>
*
* @return a sliced buffer that shares its content with this buffer.
* @since Android 1.0
*/
public abstract ByteBuffer slice();
/**
* Returns a string representing the state of this byte buffer.
*
* @return a string representing the state of this byte buffer.
* @since Android 1.0
*/
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append(getClass().getName());
buf.append(", status: capacity="); //$NON-NLS-1$
buf.append(capacity());
buf.append(" position="); //$NON-NLS-1$
buf.append(position());
buf.append(" limit="); //$NON-NLS-1$
buf.append(limit());
return buf.toString();
}
}
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