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package javax.jms;
import java.util.Enumeration;
/** A <CODE>MapMessage</CODE> object is used to send a set of name-value pairs.
* The names are <CODE>String</CODE> objects, and the values are primitive
* data types in the Java programming language. The names must have a value that
* is not null, and not an empty string. The entries can be accessed
* sequentially or randomly by name. The order of the entries is undefined.
* <CODE>MapMessage</CODE> inherits from the <CODE>Message</CODE> interface
* and adds a message body that contains a Map.
*
* <P>The primitive types can be read or written explicitly using methods
* for each type. They may also be read or written generically as objects.
* For instance, a call to <CODE>MapMessage.setInt("foo", 6)</CODE> is
* equivalent to <CODE>MapMessage.setObject("foo", new Integer(6))</CODE>.
* Both forms are provided, because the explicit form is convenient for
* static programming, and the object form is needed when types are not known
* at compile time.
*
* <P>When a client receives a <CODE>MapMessage</CODE>, it is in read-only
* mode. If a client attempts to write to the message at this point, a
* <CODE>MessageNotWriteableException</CODE> is thrown. If
* <CODE>clearBody</CODE> is called, the message can now be both read from and
* written to.
*
* <P><CODE>MapMessage</CODE> objects support the following conversion table.
* The marked cases must be supported. The unmarked cases must throw a
* <CODE>JMSException</CODE>. The <CODE>String</CODE>-to-primitive conversions
* may throw a runtime exception if the primitive's <CODE>valueOf()</CODE>
* method does not accept it as a valid <CODE>String</CODE> representation of
* the primitive.
*
* <P>A value written as the row type can be read as the column type.
*
* <PRE>
* | | boolean byte short char int long float double String byte[]
* |----------------------------------------------------------------------
* |boolean | X X
* |byte | X X X X X
* |short | X X X X
* |char | X X
* |int | X X X
* |long | X X
* |float | X X X
* |double | X X
* |String | X X X X X X X X
* |byte[] | X
* |----------------------------------------------------------------------
* </PRE>
*
* <P>Attempting to read a null value as a primitive type must be treated
* as calling the primitive's corresponding <code>valueOf(String)</code>
* conversion method with a null value. Since <code>char</code> does not
* support a <code>String</code> conversion, attempting to read a null value
* as a <code>char</code> must throw a <code>NullPointerException</code>.
*
* @version 1.1 February 2, 002
* @author Mark Hapner
* @author Rich Burridge
*
* @see javax.jms.Session#createMapMessage()
* @see javax.jms.BytesMessage
* @see javax.jms.Message
* @see javax.jms.ObjectMessage
* @see javax.jms.StreamMessage
* @see javax.jms.TextMessage
*/
public interface MapMessage extends Message {
/** Returns the <CODE>boolean</CODE> value with the specified name.
*
* @param name the name of the <CODE>boolean</CODE>
*
* @return the <CODE>boolean</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
boolean
getBoolean(String name) throws JMSException;
/** Returns the <CODE>byte</CODE> value with the specified name.
*
* @param name the name of the <CODE>byte</CODE>
*
* @return the <CODE>byte</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
byte
getByte(String name) throws JMSException;
/** Returns the <CODE>short</CODE> value with the specified name.
*
* @param name the name of the <CODE>short</CODE>
*
* @return the <CODE>short</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
short
getShort(String name) throws JMSException;
/** Returns the Unicode character value with the specified name.
*
* @param name the name of the Unicode character
*
* @return the Unicode character value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
char
getChar(String name) throws JMSException;
/** Returns the <CODE>int</CODE> value with the specified name.
*
* @param name the name of the <CODE>int</CODE>
*
* @return the <CODE>int</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
int
getInt(String name) throws JMSException;
/** Returns the <CODE>long</CODE> value with the specified name.
*
* @param name the name of the <CODE>long</CODE>
*
* @return the <CODE>long</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
long
getLong(String name) throws JMSException;
/** Returns the <CODE>float</CODE> value with the specified name.
*
* @param name the name of the <CODE>float</CODE>
*
* @return the <CODE>float</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
float
getFloat(String name) throws JMSException;
/** Returns the <CODE>double</CODE> value with the specified name.
*
* @param name the name of the <CODE>double</CODE>
*
* @return the <CODE>double</CODE> value with the specified name
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
double
getDouble(String name) throws JMSException;
/** Returns the <CODE>String</CODE> value with the specified name.
*
* @param name the name of the <CODE>String</CODE>
*
* @return the <CODE>String</CODE> value with the specified name; if there
* is no item by this name, a null value is returned
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
String
getString(String name) throws JMSException;
/** Returns the byte array value with the specified name.
*
* @param name the name of the byte array
*
* @return a copy of the byte array value with the specified name; if there
* is no
* item by this name, a null value is returned.
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
* @exception MessageFormatException if this type conversion is invalid.
*/
byte[]
getBytes(String name) throws JMSException;
/** Returns the value of the object with the specified name.
*
* <P>This method can be used to return, in objectified format,
* an object in the Java programming language ("Java object") that had
* been stored in the Map with the equivalent
* <CODE>setObject</CODE> method call, or its equivalent primitive
* <CODE>set<I>type</I></CODE> method.
*
* <P>Note that byte values are returned as <CODE>byte[]</CODE>, not
* <CODE>Byte[]</CODE>.
*
* @param name the name of the Java object
*
* @return a copy of the Java object value with the specified name, in
* objectified format (for example, if the object was set as an
* <CODE>int</CODE>, an <CODE>Integer</CODE> is returned); if there is no
* item by this name, a null value is returned
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
*/
Object
getObject(String name) throws JMSException;
/** Returns an <CODE>Enumeration</CODE> of all the names in the
* <CODE>MapMessage</CODE> object.
*
* @return an enumeration of all the names in this <CODE>MapMessage</CODE>
*
* @exception JMSException if the JMS provider fails to read the message
* due to some internal error.
*/
Enumeration
getMapNames() throws JMSException;
/** Sets a <CODE>boolean</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>boolean</CODE>
* @param value the <CODE>boolean</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setBoolean(String name, boolean value) throws JMSException;
/** Sets a <CODE>byte</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>byte</CODE>
* @param value the <CODE>byte</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setByte(String name, byte value)
throws JMSException;
/** Sets a <CODE>short</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>short</CODE>
* @param value the <CODE>short</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setShort(String name, short value)
throws JMSException;
/** Sets a Unicode character value with the specified name into the Map.
*
* @param name the name of the Unicode character
* @param value the Unicode character value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setChar(String name, char value)
throws JMSException;
/** Sets an <CODE>int</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>int</CODE>
* @param value the <CODE>int</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setInt(String name, int value)
throws JMSException;
/** Sets a <CODE>long</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>long</CODE>
* @param value the <CODE>long</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setLong(String name, long value)
throws JMSException;
/** Sets a <CODE>float</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>float</CODE>
* @param value the <CODE>float</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setFloat(String name, float value)
throws JMSException;
/** Sets a <CODE>double</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>double</CODE>
* @param value the <CODE>double</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setDouble(String name, double value)
throws JMSException;
/** Sets a <CODE>String</CODE> value with the specified name into the Map.
*
* @param name the name of the <CODE>String</CODE>
* @param value the <CODE>String</CODE> value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setString(String name, String value)
throws JMSException;
/** Sets a byte array value with the specified name into the Map.
*
* @param name the name of the byte array
* @param value the byte array value to set in the Map; the array
* is copied so that the value for <CODE>name</CODE> will
* not be altered by future modifications
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception NullPointerException if the name is null, or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setBytes(String name, byte[] value)
throws JMSException;
/** Sets a portion of the byte array value with the specified name into the
* Map.
*
* @param name the name of the byte array
* @param value the byte array value to set in the Map
* @param offset the initial offset within the byte array
* @param length the number of bytes to use
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setBytes(String name, byte[] value,
int offset, int length)
throws JMSException;
/** Sets an object value with the specified name into the Map.
*
* <P>This method works only for the objectified primitive
* object types (<code>Integer</code>, <code>Double</code>,
* <code>Long</code> ...), <code>String</code> objects, and byte
* arrays.
*
* @param name the name of the Java object
* @param value the Java object value to set in the Map
*
* @exception JMSException if the JMS provider fails to write the message
* due to some internal error.
* @exception IllegalArgumentException if the name is null or if the name is
* an empty string.
* @exception MessageFormatException if the object is invalid.
* @exception MessageNotWriteableException if the message is in read-only
* mode.
*/
void
setObject(String name, Object value)
throws JMSException;
/** Indicates whether an item exists in this <CODE>MapMessage</CODE> object.
*
* @param name the name of the item to test
*
* @return true if the item exists
*
* @exception JMSException if the JMS provider fails to determine if the
* item exists due to some internal error.
*/
boolean
itemExists(String name) throws JMSException;
}
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