JavaFileWriter.java

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/*
 * JavaFileWriter.java
 *
 * Created on November 14, 2001, 5:11 PM
 */

package com.sun.jdo.spi.persistence.utility.generator;

import java.io.IOException;

/** 
 * This interface can be used to describe a java source file.  The resulting 
 * source definition can be viewed by calling {@link java.lang.Object#toString} 
 * or saved to a file by calling {@link #save}.  The semantics of this 
 * interface are as follows:
 * - Resource allocation is deferred to save - there is no need to worry about
 * resource cleanup if an IOException is thrown from other methods (addImport, 
 * setPackage, addClass).
 * - Any implementation of this interface must handle the closing of resources
 * during save if an exception is thrown.
 *
 *<p>
 * Use this interface in conjunction with one or more {@link JavaClassWriter} 
 * instances to describe the class(es) in a java file.
 *
 * @author raccah
 */
public interface JavaFileWriter
{
	/** Sets the package for this file.  Note that the package name format 
	 * must be package style (that is - it can contain . but not / or $).
	 * @param packageName The name of the package for this source file.
	 * @param comments The comments shown just above the package statement.
	 * The comments are passed as an array so the line separators can be added
	 * by the implementation.  Note that not all implementations will choose
	 * to make use of this comment.
	 * @throws IOException If the package cannot be set.
	 */	
	public void setPackage (String packageName, String[] comments)
		throws IOException;

	/** Adds an import statement for this source file.
	 * @param importName Name of the class or package (including the *) to be
	 * imported.  This string should not contain "import" or the ;
	 * @param comments The comments shown just above the import statement.
	 * The comments are passed as an array so the line separators can be added
	 * by the implementation.  Note that not all implementations will choose
	 * to make use of this comment.
	 * @throws IOException If the import information cannot be added.
	 */	
	public void addImport (String importName, String[] comments)
		throws IOException;

	/** Adds a class to this source file.
	 * @param classWriter The definition of the class.
	 * @throws IOException If the class information cannot be added.
	 */	
	public void addClass (JavaClassWriter classWriter) throws IOException;

	/** Saves the file by writing out the source contents to whatever 
	 * file (or alternate representation) was specified (usually by the 
	 * constructor of the implementation class.
	 * @throws IOException If the file cannot be saved.
	 */	
	public void save () throws IOException;
}