JInt.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.hadoop.record.compiler;


/**
 * Code generator for "int" type
 */
public class JInt extends JType {
  
  class JavaInt extends JavaType {
    
    JavaInt() {
      super("int", "Int", "Integer", "TypeID.RIOType.INT");
    }
    
    String getTypeIDObjectString() {
      return "org.apache.hadoop.record.meta.TypeID.IntTypeID";
    }

    void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
      cb.append("{\n");
      cb.append("int i = org.apache.hadoop.record.Utils.readVInt("+b+", "+s+");\n");
      cb.append("int z = org.apache.hadoop.record.Utils.getVIntSize(i);\n");
      cb.append(s+"+=z; "+l+"-=z;\n");
      cb.append("}\n");
    }
    
    void genCompareBytes(CodeBuffer cb) {
      cb.append("{\n");
      cb.append("int i1 = org.apache.hadoop.record.Utils.readVInt(b1, s1);\n");
      cb.append("int i2 = org.apache.hadoop.record.Utils.readVInt(b2, s2);\n");
      cb.append("if (i1 != i2) {\n");
      cb.append("return ((i1-i2) < 0) ? -1 : 0;\n");
      cb.append("}\n");
      cb.append("int z1 = org.apache.hadoop.record.Utils.getVIntSize(i1);\n");
      cb.append("int z2 = org.apache.hadoop.record.Utils.getVIntSize(i2);\n");
      cb.append("s1+=z1; s2+=z2; l1-=z1; l2-=z2;\n");
      cb.append("}\n");
    }
  }

  class CppInt extends CppType {
    
    CppInt() {
      super("int32_t");
    }
    
    String getTypeIDObjectString() {
      return "new ::hadoop::TypeID(::hadoop::RIOTYPE_INT)";
    }
  }

  /** Creates a new instance of JInt */
  public JInt() {
    setJavaType(new JavaInt());
    setCppType(new CppInt());
    setCType(new CType());
  }
  
  String getSignature() {
    return "i";
  }
}