001    /***
002     * ASM: a very small and fast Java bytecode manipulation framework
003     * Copyright (c) 2000-2005 INRIA, France Telecom
004     * All rights reserved.
005     *
006     * Redistribution and use in source and binary forms, with or without
007     * modification, are permitted provided that the following conditions
008     * are met:
009     * 1. Redistributions of source code must retain the above copyright
010     *    notice, this list of conditions and the following disclaimer.
011     * 2. Redistributions in binary form must reproduce the above copyright
012     *    notice, this list of conditions and the following disclaimer in the
013     *    documentation and/or other materials provided with the distribution.
014     * 3. Neither the name of the copyright holders nor the names of its
015     *    contributors may be used to endorse or promote products derived from
016     *    this software without specific prior written permission.
017     *
018     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021     * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
028     * THE POSSIBILITY OF SUCH DAMAGE.
029     */
030    package net.sourceforge.retroweaver.optimizer;
031    
032    import org.objectweb.asm.AnnotationVisitor;
033    import org.objectweb.asm.Attribute;
034    import org.objectweb.asm.FieldVisitor;
035    
036    /**
037     * A {@link FieldVisitor} that collects the {@link Constant}s of the fields it
038     * visits.
039     * 
040     * @author Eric Bruneton
041     */
042    public class FieldConstantsCollector implements FieldVisitor {
043    
044        private FieldVisitor fv;
045    
046        private ConstantPool cp;
047    
048        public FieldConstantsCollector(final FieldVisitor fv, final ConstantPool cp)
049        {
050            this.fv = fv;
051            this.cp = cp;
052        }
053    
054        public AnnotationVisitor visitAnnotation(
055            final String desc,
056            final boolean visible)
057        {
058            cp.newUTF8(desc);
059            if (visible) {
060                cp.newUTF8("RuntimeVisibleAnnotations");
061            } else {
062                cp.newUTF8("RuntimeInvisibleAnnotations");
063            }
064            return new AnnotationConstantsCollector(fv.visitAnnotation(desc,
065                    visible), cp);
066        }
067    
068        public void visitAttribute(final Attribute attr) {
069            // can do nothing
070            fv.visitAttribute(attr);
071        }
072    
073        public void visitEnd() {
074            fv.visitEnd();
075        }
076    }