content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.druid.sql.dialect.oracle.ast.clause;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLReplaceable;
  import com.alibaba.druid.sql.dialect.oracle.ast.OracleSQLObjectImpl;
  import com.alibaba.druid.sql.dialect.oracle.visitor.OracleASTVisitor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class SampleClause extends OracleSQLObjectImpl implements SQLReplaceable {
      private boolean block;
  
      private final List<SQLExpr> percent = new ArrayList<SQLExpr>();
  
      private SQLExpr seedValue;
  
      public boolean isBlock() {
          return block;
      }
  
      public void setBlock(boolean block) {
          this.block = block;
      }
  
      public List<SQLExpr> getPercent() {
          return percent;
      }
  
      public void addPercent(SQLExpr x) {
          if (x == null) {
              return;
          }
          x.setParent(this);
          this.percent.add(x);
      }
  
      public SQLExpr getSeedValue() {
          return seedValue;
      }
  
      public void setSeedValue(SQLExpr seedValue) {
          if (seedValue != null) {
              seedValue.setParent(this);
          }
          this.seedValue = seedValue;
      }
  
      @Override
      public void accept0(OracleASTVisitor visitor) {
          if (visitor.visit(this)) {
              acceptChild(visitor, seedValue);
              acceptChild(visitor, percent);
          }
          visitor.endVisit(this);
      }
  
      @Override
      public SampleClause clone() {
          SampleClause x = new SampleClause();
  
          x.block = block;
  
          for (SQLExpr item : percent) {
              SQLExpr item1 = item.clone();
              item1.setParent(x);
              x.percent.add(item1);
          }
  
          if (seedValue != null) {
              x.setSeedValue(seedValue.clone());
          }
  
          return x;
      }
  
      @Override
      public boolean replace(SQLExpr expr, SQLExpr target) {
          for (int i = percent.size() - 1; i >= 0; i--) {
              if (percent.get(i) == expr) {
                  percent.set(i, target);
                  return true;
              }
          }
  
          if (expr == seedValue) {
              setSeedValue(target);
              return true;
          }
  
          return false;
      }
  }
  