Examples with ASMHelper org.apache.cxf.common.util.ASMHelper used on opensource projects

Example 6 with ASMHelper

use of org.apache.cxf.common.util.ASMHelper in project cxf by apache.

the class JAXBUtils method createEclipseNamespaceMapper.

/*
    // This is the "prototype" for the ASM generated class below
    public static class MapNamespacePrefixMapper2
        extends org.eclipse.persistence.internal.oxm.record.namespaces.MapNamespacePrefixMapper {

        String nsctxt[];

        public MapNamespacePrefixMapper2(Map<String, String> foo) {
            super(foo);
        }
        public String[] getPreDeclaredNamespaceUris() {
            String sup[] = super.getPreDeclaredNamespaceUris();
            if (nsctxt == null) {
                return sup;
            }
            List<String> s = new ArrayList<>(Arrays.asList(sup));
            for (int x = 1; x < nsctxt.length; x = x + 2) {
                s.remove(nsctxt[x]);
            }
            return s.toArray(new String[s.size()]);
        }
        public void setContextualNamespaceDecls(String f[]) {
            nsctxt = f;
        }
        public String[] getContextualNamespaceDecls() {
            return nsctxt;
        }
    }
    */
// CHECKSTYLE:OFF
// bunch of really long ASM based methods that cannot be shortened easily
private static Object createEclipseNamespaceMapper(Class<?> mcls, Map<String, String> map) {
    ASMHelper helper = new ASMHelper();
    String className = "org.apache.cxf.jaxb.EclipseNamespaceMapper";
    String slashedName = "org/apache/cxf/jaxb/EclipseNamespaceMapper";
    Class<?> cls = helper.findClass(className, JAXBUtils.class);
    if (cls == null) {
        ClassWriter cw = helper.createClassWriter();
        if (cw == null) {
            return null;
        }
        String superName = "org/eclipse/persistence/internal/oxm/record/namespaces/MapNamespacePrefixMapper";
        FieldVisitor fv;
        MethodVisitor mv;
        cw.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, slashedName, null, superName, null);
        cw.visitSource("EclipseNamespaceMapper.java", null);
        fv = cw.visitField(Opcodes.ACC_PRIVATE, "nsctxt", "[Ljava/lang/String;", null, null);
        fv.visitEnd();
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "(Ljava/util/Map;)V", "(Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;)V", null);
        mv.visitCode();
        Label l0 = helper.createLabel();
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superName, "<init>", "(Ljava/util/Map;)V", false);
        Label l1 = helper.createLabel();
        mv.visitLabel(l1);
        mv.visitInsn(Opcodes.RETURN);
        Label l2 = helper.createLabel();
        mv.visitLabel(l2);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "setContextualNamespaceDecls", "([Ljava/lang/String;)V", null, null);
        mv.visitCode();
        l0 = helper.createLabel();
        mv.visitLabel(l0);
        mv.visitLineNumber(47, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, slashedName, "nsctxt", "[Ljava/lang/String;");
        l1 = helper.createLabel();
        mv.visitLabel(l1);
        mv.visitLineNumber(48, l1);
        mv.visitInsn(Opcodes.RETURN);
        l2 = helper.createLabel();
        mv.visitLabel(l2);
        mv.visitLocalVariable("this", "L" + slashedName + ";", null, l0, l2, 0);
        mv.visitLocalVariable("contextualNamespaceDecls", "[Ljava/lang/String;", null, l0, l2, 1);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getContextualNamespaceDecls", "()[Ljava/lang/String;", null, null);
        mv.visitCode();
        l0 = helper.createLabel();
        mv.visitLabel(l0);
        mv.visitLineNumber(51, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, slashedName, "nsctxt", "[Ljava/lang/String;");
        mv.visitInsn(Opcodes.ARETURN);
        l1 = helper.createLabel();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + slashedName + ";", null, l0, l1, 0);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getPreDeclaredNamespaceUris", "()[Ljava/lang/String;", null, null);
        mv.visitCode();
        l0 = helper.createLabel();
        mv.visitLabel(l0);
        mv.visitLineNumber(1036, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superName, "getPreDeclaredNamespaceUris", "()[Ljava/lang/String;", false);
        mv.visitVarInsn(Opcodes.ASTORE, 1);
        l1 = helper.createLabel();
        mv.visitLabel(l1);
        mv.visitLineNumber(1037, l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, slashedName, "nsctxt", "[Ljava/lang/String;");
        l2 = helper.createLabel();
        mv.visitJumpInsn(Opcodes.IFNONNULL, l2);
        Label l3 = helper.createLabel();
        mv.visitLabel(l3);
        mv.visitLineNumber(1038, l3);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitLabel(l2);
        mv.visitLineNumber(1040, l2);
        mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "[Ljava/lang/String;" }, 0, null);
        mv.visitTypeInsn(Opcodes.NEW, "java/util/ArrayList");
        mv.visitInsn(Opcodes.DUP);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/util/Arrays", "asList", "([Ljava/lang/Object;)Ljava/util/List;", false);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "(Ljava/util/Collection;)V", false);
        mv.visitVarInsn(Opcodes.ASTORE, 2);
        Label l4 = helper.createLabel();
        mv.visitLabel(l4);
        mv.visitLineNumber(1041, l4);
        mv.visitInsn(Opcodes.ICONST_1);
        mv.visitVarInsn(Opcodes.ISTORE, 3);
        Label l5 = helper.createLabel();
        mv.visitLabel(l5);
        Label l6 = helper.createLabel();
        mv.visitJumpInsn(Opcodes.GOTO, l6);
        Label l7 = helper.createLabel();
        mv.visitLabel(l7);
        mv.visitLineNumber(1042, l7);
        mv.visitFrame(Opcodes.F_APPEND, 2, new Object[] { "java/util/List", Opcodes.INTEGER }, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, slashedName, "nsctxt", "[Ljava/lang/String;");
        mv.visitVarInsn(Opcodes.ILOAD, 3);
        mv.visitInsn(Opcodes.AALOAD);
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/List", "remove", "(Ljava/lang/Object;)Z", true);
        mv.visitInsn(Opcodes.POP);
        Label l8 = helper.createLabel();
        mv.visitLabel(l8);
        mv.visitLineNumber(1041, l8);
        mv.visitIincInsn(3, 2);
        mv.visitLabel(l6);
        mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ILOAD, 3);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, slashedName, "nsctxt", "[Ljava/lang/String;");
        mv.visitInsn(Opcodes.ARRAYLENGTH);
        mv.visitJumpInsn(Opcodes.IF_ICMPLT, l7);
        Label l9 = helper.createLabel();
        mv.visitLabel(l9);
        mv.visitLineNumber(1044, l9);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/List", "size", "()I", true);
        mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/String");
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/List", "toArray", "([Ljava/lang/Object;)[Ljava/lang/Object;", true);
        mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/String;");
        mv.visitInsn(Opcodes.ARETURN);
        Label l10 = helper.createLabel();
        mv.visitLabel(l10);
        mv.visitLocalVariable("this", "L" + slashedName + ";", null, l0, l10, 0);
        mv.visitLocalVariable("sup", "[Ljava/lang/String;", null, l1, l10, 1);
        mv.visitLocalVariable("s", "Ljava/util/List;", "Ljava/util/List<Ljava/lang/String;>;", l4, l10, 2);
        mv.visitLocalVariable("x", "I", null, l5, l9, 3);
        mv.visitMaxs(3, 4);
        mv.visitEnd();
        cw.visitEnd();
        byte[] bts = cw.toByteArray();
        cls = helper.loadClass(className, mcls, bts);
    }
    try {
        return cls.getConstructor(Map.class).newInstance(map);
    } catch (Throwable e) {
        e.printStackTrace();
        return null;
    }
}