saxclassadapter.java

jboss规则引擎

/***
 * ASM XML Adapter
 * Copyright (c) 2004, Eugene Kuleshov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions 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.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.drools.asm.xml;

import org.drools.asm.AnnotationVisitor;
import org.drools.asm.Attribute;
import org.drools.asm.ClassVisitor;
import org.drools.asm.FieldVisitor;
import org.drools.asm.MethodVisitor;
import org.drools.asm.Opcodes;
import org.xml.sax.ContentHandler;
import org.xml.sax.helpers.AttributesImpl;

/**
 * A {@link org.drools.asm.ClassVisitor ClassVisitor} that generates SAX 2.0
 * events from the visited class. It can feed any kind of
 * {@link org.xml.sax.ContentHandler ContentHandler}, e.g. XML serializer, XSLT
 * or XQuery engines.
 * 
 * @see org.drools.asm.xml.Processor
 * @see org.drools.asm.xml.ASMContentHandler
 * 
 * @author Eugene Kuleshov
 */
public final class SAXClassAdapter extends SAXAdapter
    implements
    ClassVisitor {
    private boolean singleDocument;

    /**
     * Constructs a new {@link SAXClassAdapter SAXClassAdapter} object.
     * 
     * @param h content handler that will be used to send SAX 2.0 events.
     * @param singleDocument if <tt>true</tt> adapter will not produce
     *        {@link ContentHandler#startDocument() startDocument()} and
     *        {@link ContentHandler#endDocument() endDocument()} events.
     */
    public SAXClassAdapter(final ContentHandler h,
                           boolean singleDocument) {
        super( h );
        this.singleDocument = singleDocument;
        if ( !singleDocument ) {
            addDocumentStart();
        }
    }

    public void visitSource(final String source,
                            final String debug) {
        if ( source == null && debug == null ) {
            return;
        }

        final AttributesImpl att = new AttributesImpl();
        if ( source != null ) {
            att.addAttribute( "",
                              "file",
                              "file",
                              "",
                              encode( source ) );
        }
        if ( debug != null ) {
            att.addAttribute( "",
                              "debug",
                              "debug",
                              "",
                              encode( debug ) );
        }

        addElement( "source",
                    att );
    }

    public void visitOuterClass(final String owner,
                                final String name,
                                final String desc) {
        final AttributesImpl att = new AttributesImpl();
        att.addAttribute( "",
                          "owner",
                          "owner",
                          "",
                          owner );
        if ( name != null ) {
            att.addAttribute( "",
                              "name",
                              "name",
                              "",
                              name );
        }
        if ( desc != null ) {
            att.addAttribute( "",
                              "desc",
                              "desc",
                              "",
                              desc );
        }

        addElement( "outerclass",
                    att );
    }

    public final void visitAttribute(final Attribute attr) {
        // TODO Auto-generated SAXClassAdapter.visitAttribute
    }

    public AnnotationVisitor visitAnnotation(final String desc,
                                             final boolean visible) {
        return new SAXAnnotationAdapter( getContentHandler(),
                                         "annotation",
                                         visible ? 1 : -1,
                                         null,
                                         desc );
    }

    public void visit(final int version,
                      final int access,
                      final String name,
                      final String signature,
                      final String superName,
                      final String[] interfaces) {
        final StringBuffer sb = new StringBuffer();
        if ( (access & Opcodes.ACC_PUBLIC) != 0 ) {
            sb.append( "public " );
        }
        if ( (access & Opcodes.ACC_PRIVATE) != 0 ) {
            sb.append( "private " );
        }
        if ( (access & Opcodes.ACC_PROTECTED) != 0 ) {
            sb.append( "protected " );
        }
        if ( (access & Opcodes.ACC_FINAL) != 0 ) {
            sb.append( "final " );
        }
        if ( (access & Opcodes.ACC_SUPER) != 0 ) {
            sb.append( "super " );
        }
        if ( (access & Opcodes.ACC_INTERFACE) != 0 ) {
            sb.append( "interface " );
        }
        if ( (access & Opcodes.ACC_ABSTRACT) != 0 ) {
            sb.append( "abstract " );
        }
        if ( (access & Opcodes.ACC_SYNTHETIC) != 0 ) {
            sb.append( "synthetic " );
        }
        if ( (access & Opcodes.ACC_ANNOTATION) != 0 ) {
            sb.append( "annotation " );
        }
        if ( (access & Opcodes.ACC_ENUM) != 0 ) {
            sb.append( "enum " );
        }
        if ( (access & Opcodes.ACC_DEPRECATED) != 0 ) {
            sb.append( "deprecated " );
        }

        final AttributesImpl att = new AttributesImpl();
        att.addAttribute( "",
                          "access",
                          "access",
                          "",
                          sb.toString() );
        if ( name != null ) {
            att.addAttribute( "",
                              "name",
                              "name",
                              "",
                              name );
        }
        if ( signature != null ) {
            att.addAttribute( "",
                              "signature",
                              "signature",
                              "",
                              encode( signature ) );
        }
        if ( superName != null ) {
            att.addAttribute( "",
                              "parent",
                              "parent",
                              "",
                              superName );
        }
        att.addAttribute( "",
                          "major",
                          "major",
                          "",
                          Integer.toString( version & 0xFFFF ) );
        att.addAttribute( "",
                          "minor",
                          "minor",
                          "",
                          Integer.toString( version >>> 16 ) );
        addStart( "class",
                  att );

        addStart( "interfaces",
                  new AttributesImpl() );
        if ( interfaces != null && interfaces.length > 0 ) {
            for ( int i = 0; i < interfaces.length; i++ ) {
                final AttributesImpl att2 = new AttributesImpl();
                att2.addAttribute( "",
                                   "name",
                                   "name",
                                   "",
                                   interfaces[i] );
                addElement( "interface",
                            att2 );
            }
        }
        addEnd( "interfaces" );
    }

    public FieldVisitor visitField(final int access,
                                   final String name,
                                   final String desc,
                                   final String signature,
                                   final Object value) {
        final StringBuffer sb = new StringBuffer();
        if ( (access & Opcodes.ACC_PUBLIC) != 0 ) {
            sb.append( "public " );
        }
        if ( (access & Opcodes.ACC_PRIVATE) != 0 ) {
            sb.append( "private " );
        }
        if ( (access & Opcodes.ACC_PROTECTED) != 0 ) {
            sb.append( "protected " );
        }
        if ( (access & Opcodes.ACC_STATIC) != 0 ) {