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Diffstat (limited to 'src/classes/com/sun/gluegen/FunctionEmitter.java')
-rw-r--r-- | src/classes/com/sun/gluegen/FunctionEmitter.java | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/classes/com/sun/gluegen/FunctionEmitter.java b/src/classes/com/sun/gluegen/FunctionEmitter.java new file mode 100644 index 000000000..baf08b93a --- /dev/null +++ b/src/classes/com/sun/gluegen/FunctionEmitter.java @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * - Redistribution of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistribution in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of Sun Microsystems, Inc. or the names of + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * This software is provided "AS IS," without a warranty of any kind. ALL + * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, + * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN + * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR + * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR + * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR + * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR + * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE + * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, + * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF + * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + * + * You acknowledge that this software is not designed or intended for use + * in the design, construction, operation or maintenance of any nuclear + * facility. + * + * Sun gratefully acknowledges that this software was originally authored + * and developed by Kenneth Bradley Russell and Christopher John Kline. + */ + +package com.sun.gluegen; + +import java.util.*; +import java.io.*; + +public abstract class FunctionEmitter +{ + public static final EmissionModifier STATIC = new EmissionModifier("static"); + + private HashSet modifiers = new HashSet(4); + private CommentEmitter commentEmitter = null; + private PrintWriter defaultOutput; + + /** + * Constructs the FunctionEmitter with a CommentEmitter that emits nothing. + */ + public FunctionEmitter(PrintWriter defaultOutput) + { + assert(defaultOutput != null); + this.defaultOutput = defaultOutput; + } + + /** + * Makes this FunctionEmitter a copy of the passed one. + */ + public FunctionEmitter(FunctionEmitter arg) { + modifiers = (HashSet) arg.modifiers.clone(); + commentEmitter = arg.commentEmitter; + defaultOutput = arg.defaultOutput; + } + + public PrintWriter getDefaultOutput() { return defaultOutput; } + + public void addModifiers(Iterator/*<EmissionModifier>*/ mi) + { + while (mi.hasNext()) + { + modifiers.add((EmissionModifier) mi.next()); + } + } + public void addModifier(EmissionModifier m) { modifiers.add(m); } + + public boolean removeModifier(EmissionModifier m) { return modifiers.remove(m); } + + public void clearModifiers() { modifiers.clear(); } + + public boolean hasModifier(EmissionModifier m) { return modifiers.contains(m); } + + public Iterator getModifiers() { return modifiers.iterator(); } + + public abstract String getName(); + + /** + * Emit the function to the specified output (instead of the default + * output). + */ + public void emit(PrintWriter output) + { + emitDocComment(output); + //output.println(" // Emitter: " + getClass().getName()); + emitSignature(output); + emitBody(output); + } + + /** + * Emit the function to the default output (the output that was passed to + * the constructor) + */ + public final void emit() + { + emit(getDefaultOutput()); + } + + /** Returns, as a String, whatever {@link #emit} would output. */ + public String toString() + { + StringWriter sw = new StringWriter(500); + PrintWriter w = new PrintWriter(sw); + emit(w); + return sw.toString(); + } + + /** + * Set the object that will emit the comment for this function. If the + * parameter is null, no comment will be emitted. + */ + public void setCommentEmitter(CommentEmitter cEmitter) + { + commentEmitter = cEmitter; + } + + /** + * Get the comment emitter for this FunctionEmitter. The return value may be + * null, in which case no comment emitter has been set. + */ + public CommentEmitter getCommentEmitter() { return commentEmitter; } + + protected void emitDocComment(PrintWriter writer) + { + if (commentEmitter != null) + { + writer.print(getBaseIndentString()); //indent + + writer.print(getCommentStartString()); + + commentEmitter.emit(this, writer); + + writer.print(getBaseIndentString()); //indent + + writer.println(getCommentEndString()); + } + } + + protected void emitSignature(PrintWriter writer) + { + writer.print(getBaseIndentString()); // indent method + + int numEmitted = emitModifiers(writer); + if (numEmitted > 0) + { + writer.print(" "); + } + + emitReturnType(writer); + writer.print(" "); + + emitName(writer); + writer.print("("); + + emitArguments(writer); + writer.print(")"); + } + + protected int emitModifiers(PrintWriter writer) + { + PrintWriter w = getDefaultOutput(); + int numEmitted = 0; + for (Iterator it = getModifiers(); it.hasNext(); ) + { + writer.print(it.next()); + ++numEmitted; + if (it.hasNext()) + { + writer.print(" "); + } + } + return numEmitted; + } + + protected String getBaseIndentString() { return ""; } + + protected String getCommentStartString() { return "/* "; } + protected String getCommentEndString() { return " */"; } + + protected abstract void emitReturnType(PrintWriter writer); + protected abstract void emitName(PrintWriter writer); + /** Returns the number of arguments emitted. */ + protected abstract int emitArguments(PrintWriter writer); + protected abstract void emitBody(PrintWriter writer); + + public static class EmissionModifier + { + public final String toString() { return emittedForm; } + + private String emittedForm; + protected EmissionModifier(String emittedForm) { this.emittedForm = emittedForm; } + } +} + |