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.ast.expr;
  
  import com.alibaba.druid.sql.ast.SQLExprImpl;
  import com.alibaba.druid.sql.ast.SQLObject;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  import com.alibaba.druid.util.Utils;
  
  import java.math.BigInteger;
  import java.util.Collections;
  import java.util.List;
  
  public class SQLBinaryExpr extends SQLExprImpl implements SQLLiteralExpr, SQLValuableExpr {
      private String text;
  
      private transient Number val;
  
      public SQLBinaryExpr() {
      }
  
      public SQLBinaryExpr(String value) {
          super();
          this.text = value;
      }
  
      public String getText() {
          return text;
      }
  
      public Number getValue() {
          if (text == null) {
              return null;
          }
  
          if (val == null) {
              long[] words = new long[text.length() / 64 + 1];
              for (int i = text.length() - 1; i >= 0; --i) {
                  char ch = text.charAt(i);
                  if (ch == '1') {
                      int wordIndex = i >> 6;
                      words[wordIndex] |= (1L << (text.length() - 1 - i));
                  }
              }
  
              if (words.length == 1) {
                  val = words[0];
              } else {
                  byte[] bytes = new byte[words.length * 8];
  
                  for (int i = 0; i < words.length; ++i) {
                      Utils.putLong(bytes, (words.length - 1 - i) * 8, words[i]);
                  }
  
                  val = new BigInteger(bytes);
              }
          }
  
          return val;
      }
  
      public void setValue(String value) {
          this.text = value;
      }
  
      public void accept0(SQLASTVisitor visitor) {
          visitor.visit(this);
  
          visitor.endVisit(this);
      }
  
      public void output(StringBuilder buf) {
          buf.append("b'");
          buf.append(text);
          buf.append('\'');
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((text == null) ? 0 : text.hashCode());
          return result;
      }
  
      public SQLBinaryExpr clone() {
          return new SQLBinaryExpr(text);
      }
  
      @Override
      public List<SQLObject> getChildren() {
          return Collections.emptyList();
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null) {
              return false;
          }
          if (getClass() != obj.getClass()) {
              return false;
          }
          SQLBinaryExpr other = (SQLBinaryExpr) obj;
          if (text == null) {
              if (other.text != null) {
                  return false;
              }
          } else if (!text.equals(other.text)) {
              return false;
          }
          return true;
      }
  
  }
  