Subversion Repositories openrisc

/***

 * ASM: a very small and fast Java bytecode manipulation framework

 * Copyright (c) 2000-2005 INRIA, France Telecom

 * 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.objectweb.asm.util;

import org.objectweb.asm.AnnotationVisitor;

import org.objectweb.asm.Type;

/**

 * An {@link AnnotationVisitor} that checks that its methods are properly used.

 *

 * @author Eric Bruneton

 */

public class CheckAnnotationAdapter implements AnnotationVisitor {

    private AnnotationVisitor av;

    private boolean named;

    private boolean end;

    public CheckAnnotationAdapter(final AnnotationVisitor av) {

        this(av, true);

    }

    CheckAnnotationAdapter(

        final AnnotationVisitor av,

        final boolean named)

    {

        this.av = av;

        this.named = named;

    }

    public void visit(final String name, final Object value) {

        checkEnd();

        checkName(name);

        if (!(value instanceof Byte || value instanceof Boolean

                || value instanceof Character || value instanceof Short

                || value instanceof Integer || value instanceof Long

                || value instanceof Float || value instanceof Double

                || value instanceof String || value instanceof Type

                || value instanceof byte[] || value instanceof boolean[]

                || value instanceof char[] || value instanceof short[]

                || value instanceof int[] || value instanceof long[]

                || value instanceof float[] || value instanceof double[]))

        {

            throw new IllegalArgumentException("Invalid annotation value");

        }

        av.visit(name, value);

    }

    public void visitEnum(

        final String name,

        final String desc,

        final String value)

    {

        checkEnd();

        checkName(name);

        CheckMethodAdapter.checkDesc(desc, false);

        if (value == null) {

            throw new IllegalArgumentException("Invalid enum value");

        }

        av.visitEnum(name, desc, value);

    }

    public AnnotationVisitor visitAnnotation(

        final String name,

        final String desc)

    {

        checkEnd();

        checkName(name);

        CheckMethodAdapter.checkDesc(desc, false);

        return new CheckAnnotationAdapter(av.visitAnnotation(name, desc));

    }

    public AnnotationVisitor visitArray(final String name) {

        checkEnd();

        checkName(name);

        return new CheckAnnotationAdapter(av.visitArray(name), false);

    }

    public void visitEnd() {

        checkEnd();

        end = true;

        av.visitEnd();

    }

    private void checkEnd() {

        if (end) {

            throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");

        }

    }

    private void checkName(final String name) {

        if (named && name == null) {

            throw new IllegalArgumentException("Annotation value name must not be null");

        }

    }

}