/*
 * Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed 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.jboss.errai.codegen.util;

import org.jboss.errai.codegen.meta.MetaConstructor;
import org.jboss.errai.codegen.meta.MetaField;
import org.jboss.errai.codegen.meta.MetaMethod;
import org.jboss.errai.codegen.meta.MetaParameter;

/**
 * @author Mike Brock <cbrock@redhat.com>
 */
public class JSNIUtil {
  public static String fieldAccess(final MetaField field) {
    if (field.isStatic()) {
      return "@" + field.getDeclaringClass().getFullyQualifiedName().replace('$', '.') + "::"
              + field.getName();
    }
    else {
      return "instance.@" + field.getDeclaringClass().getFullyQualifiedName().replace('$', '.') + "::"
              + field.getName();
    }
  }

  public static String methodAccess(final MetaMethod method) {
    final StringBuilder buf = new StringBuilder(50);

    if (!method.getReturnType().isVoid()) {
      buf.append("return ");
    }

    if (!method.isStatic()) {
      buf.append("instance.");
    }

    buf.append('@').append(method.getDeclaringClass().getFullyQualifiedName().replace('$', '.'))
            .append("::").append(method instanceof MetaConstructor ? "new" : method.getName()).append('(');

    for (final MetaParameter parm : method.getParameters()) {
      buf.append(parm.getType().getInternalName());
    }
    buf.append(")(");

    final int length = method.getParameters().length;

    for (int i = 0; i < length; i++) {
      buf.append("a").append(i);
      if (i + 1 < length) buf.append(",");
    }
    buf.append(")");

    return buf.toString();
  }
}
