lib/server-core/src/main/java/org/apache/olingo/server/core/uri/queryoption/expression/MethodImpl.java

/*
 * 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.olingo.server.core.uri.queryoption.expression;

import org.apache.olingo.server.api.ODataApplicationException;
import org.apache.olingo.server.api.uri.queryoption.expression.Expression;
import org.apache.olingo.server.api.uri.queryoption.expression.ExpressionVisitException;
import org.apache.olingo.server.api.uri.queryoption.expression.ExpressionVisitor;
import org.apache.olingo.server.api.uri.queryoption.expression.Method;
import org.apache.olingo.server.api.uri.queryoption.expression.MethodKind;

import java.util.ArrayList;
import java.util.List;

public class MethodImpl extends ExpressionImpl implements Method {

  private MethodKind method;
  private List<ExpressionImpl> parameters = new ArrayList<ExpressionImpl>();

  @Override
  public MethodKind getMethod() {
    return method;
  }

  public MethodImpl setMethod(final MethodKind methodCalls) {
    method = methodCalls;
    return this;
  }

  @Override
  public List<Expression> getParameters() {
    List<Expression> list = new ArrayList<Expression>();
    for (ExpressionImpl item : parameters) {
      list.add(item);
    }
    return list;
  }

  public MethodImpl addParameter(final ExpressionImpl readCommonExpression) {
    parameters.add(readCommonExpression);
    return this;
  }

  @Override
  public <T> T accept(final ExpressionVisitor<T> visitor) throws ExpressionVisitException, ODataApplicationException {
    List<T> userParameters = new ArrayList<T>();
    for (ExpressionImpl parameter : parameters) {
      userParameters.add(parameter.accept(visitor));
    }
    return visitor.visitMethodCall(method, userParameters);
  }

}