asmcontenthandler.java

jboss规则引擎

        public final void end(final String element) {
            final Map vals = (Map) pop();
            final int version = ((Integer) vals.get( "version" )).intValue();
            final int access = getAccess( (String) vals.get( "access" ) );
            final String name = (String) vals.get( "name" );
            final String signature = (String) vals.get( "signature" );
            final String parent = (String) vals.get( "parent" );
            final List infs = (List) vals.get( "interfaces" );
            final String[] interfaces = (String[]) infs.toArray( new String[infs.size()] );
            ASMContentHandler.this.cw.visit( version,
                                             access,
                                             name,
                                             signature,
                                             parent,
                                             interfaces );
            push( ASMContentHandler.this.cw );
        }

    }

    /**
     * OuterClassRule
     */
    private final class OuterClassRule extends Rule {

        public final void begin(final String element,
                                final Attributes attrs) {
            final String owner = attrs.getValue( "owner" );
            final String name = attrs.getValue( "name" );
            final String desc = attrs.getValue( "desc" );
            ASMContentHandler.this.cw.visitOuterClass( owner,
                                                       name,
                                                       desc );
        }

    }

    /**
     * InnerClassRule
     */
    private final class InnerClassRule extends Rule {

        public final void begin(final String element,
                                final Attributes attrs) {
            final int access = getAccess( attrs.getValue( "access" ) );
            final String name = attrs.getValue( "name" );
            final String outerName = attrs.getValue( "outerName" );
            final String innerName = attrs.getValue( "innerName" );
            ASMContentHandler.this.cw.visitInnerClass( name,
                                                       outerName,
                                                       innerName,
                                                       access );
        }

    }

    /**
     * FieldRule
     */
    private final class FieldRule extends Rule {

        public final void begin(final String element,
                                final Attributes attrs) {
            final int access = getAccess( attrs.getValue( "access" ) );
            final String name = attrs.getValue( "name" );
            final String signature = attrs.getValue( "signature" );
            final String desc = attrs.getValue( "desc" );
            final Object value = getValue( desc,
                                           attrs.getValue( "value" ) );
            push( ASMContentHandler.this.cw.visitField( access,
                                                        name,
                                                        desc,
                                                        signature,
                                                        value ) );
        }

        public void end(final String name) {
            ((FieldVisitor) pop()).visitEnd();
        }

    }

    /**
     * MethodRule
     */
    private final class MethodRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            ASMContentHandler.this.labels = new HashMap();
            final Map vals = new HashMap();
            vals.put( "access",
                      attrs.getValue( "access" ) );
            vals.put( "name",
                      attrs.getValue( "name" ) );
            vals.put( "desc",
                      attrs.getValue( "desc" ) );
            vals.put( "signature",
                      attrs.getValue( "signature" ) );
            vals.put( "exceptions",
                      new ArrayList() );
            push( vals );
            // values will be extracted in ExceptionsRule.end();
        }

        public final void end(final String name) {
            ((MethodVisitor) pop()).visitEnd();
            ASMContentHandler.this.labels = null;
        }

    }

    /**
     * ExceptionRule
     */
    private final class ExceptionRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            ((List) ((Map) peek()).get( "exceptions" )).add( attrs.getValue( "name" ) );
        }

    }

    /**
     * ExceptionsRule
     */
    private final class ExceptionsRule extends Rule {

        public final void end(final String element) {
            final Map vals = (Map) pop();
            final int access = getAccess( (String) vals.get( "access" ) );
            final String name = (String) vals.get( "name" );
            final String desc = (String) vals.get( "desc" );
            final String signature = (String) vals.get( "signature" );
            final List excs = (List) vals.get( "exceptions" );
            final String[] exceptions = (String[]) excs.toArray( new String[excs.size()] );

            push( ASMContentHandler.this.cw.visitMethod( access,
                                                         name,
                                                         desc,
                                                         signature,
                                                         exceptions ) );
        }

    }

    /**
     * TableSwitchRule
     */
    private class TableSwitchRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            final Map vals = new HashMap();
            vals.put( "min",
                      attrs.getValue( "min" ) );
            vals.put( "max",
                      attrs.getValue( "max" ) );
            vals.put( "dflt",
                      attrs.getValue( "dflt" ) );
            vals.put( "labels",
                      new ArrayList() );
            push( vals );
        }

        public final void end(final String name) {
            final Map vals = (Map) pop();
            final int min = Integer.parseInt( (String) vals.get( "min" ) );
            final int max = Integer.parseInt( (String) vals.get( "max" ) );
            final Label dflt = getLabel( vals.get( "dflt" ) );
            final List lbls = (List) vals.get( "labels" );
            final Label[] labels = (Label[]) lbls.toArray( new Label[lbls.size()] );
            getCodeVisitor().visitTableSwitchInsn( min,
                                                   max,
                                                   dflt,
                                                   labels );
        }

    }

    /**
     * TableSwitchLabelRule
     */
    private final class TableSwitchLabelRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            ((List) ((Map) peek()).get( "labels" )).add( getLabel( attrs.getValue( "name" ) ) );
        }

    }

    /**
     * LookupSwitchRule
     */
    private final class LookupSwitchRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            final Map vals = new HashMap();
            vals.put( "dflt",
                      attrs.getValue( "dflt" ) );
            vals.put( "labels",
                      new ArrayList() );
            vals.put( "keys",
                      new ArrayList() );
            push( vals );
        }

        public final void end(final String name) {
            final Map vals = (Map) pop();
            final Label dflt = getLabel( vals.get( "dflt" ) );
            final List keyList = (List) vals.get( "keys" );
            final List lbls = (List) vals.get( "labels" );
            final Label[] labels = (Label[]) lbls.toArray( new Label[lbls.size()] );
            final int[] keys = new int[keyList.size()];
            for ( int i = 0; i < keys.length; i++ ) {
                keys[i] = Integer.parseInt( (String) keyList.get( i ) );
            }
            getCodeVisitor().visitLookupSwitchInsn( dflt,
                                                    keys,
                                                    labels );
        }

    }

    /**
     * LookupSwitchLabelRule
     */
    private final class LookupSwitchLabelRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            final Map vals = (Map) peek();
            ((List) vals.get( "labels" )).add( getLabel( attrs.getValue( "name" ) ) );
            ((List) vals.get( "keys" )).add( attrs.getValue( "key" ) );
        }

    }

    /**
     * LabelRule
     */
    private final class LabelRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            getCodeVisitor().visitLabel( getLabel( attrs.getValue( "name" ) ) );
        }

    }

    /**
     * TryCatchRule
     */
    private final class TryCatchRule extends Rule {

        public final void begin(final String name,
                                final Attributes attrs) {
            final Label start = getLabel( attrs.getValue( "start" ) );
            final Label end = getLabel( attrs.getValue( "end" ) );
            final Label handler = getLabel( attrs.getValue( "handler" ) );
            final String type = attrs.getValue( "type" );
            getCodeVisitor().visitTryCatchBlock( start,
                                                 end,
                                                 handler,
                                                 type );
        }

    }

    /**
     * LineNumberRule
     */
    private final class LineNumb