/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.tools.plugin.extractor.annotations.scanner.visitors;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.maven.tools.plugin.extractor.annotations.scanner.MojoAnnotationsScanner;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

/**
 * Visitors for fields.
 *
 * @author Olivier Lamy
 * @since 3.0
 */
public class MojoFieldVisitor extends FieldVisitor implements MojoParameterVisitor {
    private String fieldName;

    private Map<String, MojoAnnotationVisitor> annotationVisitorMap = new HashMap<>();

    private String className;

    private final List<String> typeParameters;

    MojoFieldVisitor(String fieldName, String className, List<String> typeParameters) {
        super(Opcodes.ASM9);
        this.fieldName = fieldName;
        this.className = className;
        this.typeParameters = typeParameters;
    }

    @Override
    public Map<String, MojoAnnotationVisitor> getAnnotationVisitorMap() {
        return annotationVisitorMap;
    }

    @Override
    public String getFieldName() {
        return fieldName;
    }

    @Override
    public List<String> getTypeParameters() {
        return typeParameters;
    }

    @Override
    public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
        String annotationClassName = Type.getType(desc).getClassName();
        if (!MojoAnnotationsScanner.FIELD_LEVEL_ANNOTATIONS.contains(annotationClassName)) {
            return null;
        }
        MojoAnnotationVisitor mojoAnnotationVisitor = new MojoAnnotationVisitor(annotationClassName);
        annotationVisitorMap.put(annotationClassName, mojoAnnotationVisitor);
        return mojoAnnotationVisitor;
    }

    @Override
    public String getClassName() {
        return className;
    }

    @Override
    public boolean isAnnotationOnMethod() {
        return false;
    }
}
