FormattedWriter.java

/*
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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/*
 * FormattedWriter.java
 *
 * Created on November 14, 2001, 5:50 PM
 */

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

import java.util.*;


/**
 *
 * @author raccah
 */
class FormattedWriter
{
	static private final String lineSeparator =
		System.getProperty("line.separator");
	static private final String indent = "    ";	// NOI18N

	private StringBuffer _buffer;
	private int _initialIndents = 0;

	/** Creates new FormattedWriter */
	FormattedWriter ()
	{
	}

	private StringBuffer getBuffer ()
	{
		if (_buffer == null)
			_buffer = new StringBuffer();

		return _buffer;
	}

	/** Returns a string representation of the FormattedWriter.
	 * @return The string representation of the internal StringBuffer 
	 * used by this object.
	 */	
	public String toString () { return getBuffer().toString(); }

	void writeComments (final String[] comments)
	{
		final int n = (comments != null ? comments.length : 0);

		for (int i = 0; i < n; i++)
		{
			final String s = comments[i];

			writeln("// " + (s != null ? s : ""));	// NOI18N
		}
	}

	private void _write (final int indents, final String s)
	{
		final StringBuffer buffer = getBuffer();

		if (!s.equals(lineSeparator))
		{
			for (int i = 0; i < indents; i++)
				buffer.append(indent);
		}

		buffer.append(s);
	}

	void write (final int indents, final String s)
	{
		_write(indents + _initialIndents, s);
	}

	void write (final String s)
	{
		_write(0, s);
	}

	void writeln (final int indents, final String s)
	{
		if (_initialIndents > 0)
			_write(_initialIndents, "");	// NOI18N

		_write(indents, s + lineSeparator);
	}

	void writeln (final String s)
	{
		writeln(0, s);
	}

	void writeln ()
	{
		writeln(0, "");			// NOI18N
	}

	void writeList (final int indents, final List list, 
		final boolean addSeparator)
	{
		if ((list != null) && (list.size() > 0))
		{
			Iterator iterator = list.iterator();
	
			while (iterator.hasNext())
			{
				indent(indents, iterator.next().toString());

				if (addSeparator)
					writeln();
			}

			if (!addSeparator)
				writeln();
		}
	}

	void writeList (final int indents, final List list)
	{
		writeList(indents, list, false);
	}

	void writeList (final List list)
	{
		writeList(0, list);
	}

	private void indent (final int indents, final String s)
	{
		if (s.indexOf(lineSeparator) != -1)
		{
			StringTokenizer tokenizer =
				new StringTokenizer(s, lineSeparator, true);

			while (tokenizer.hasMoreTokens())
				write(indents, tokenizer.nextToken());
		}
		else
			write(indents, s);
	}
}