/**
* 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;
import org.apache.hadoop.record.compiler.JCompType.CCompType;
import org.apache.hadoop.record.compiler.JCompType.CppCompType;
/**
*
* @author Milind Bhandarkar
*/
public class JVector extends JCompType {
static private int level = 0;
static private String getId(String id) { return id+getLevel(); }
static private String getLevel() { return Integer.toString(level); }
static private void incrLevel() { level++; }
static private void decrLevel() { level--; }
private JType type;
class JavaVector extends JavaCompType {
private JType.JavaType element;
JavaVector(JType.JavaType t) {
super("java.util.ArrayList<"+t.getWrapperType()+">",
"Vector", "java.util.ArrayList<"+t.getWrapperType()+">");
element = t;
}
void genCompareTo(CodeBuffer cb, String fname, String other) {
cb.append("{\n");
cb.append("int "+getId("len1")+" = "+fname+".size();\n");
cb.append("int "+getId("len2")+" = "+other+".size();\n");
cb.append("for(int "+getId("vidx")+" = 0; "+getId("vidx")+"<"+
getId("len1")+" && "+getId("vidx")+"<"+getId("len2")+"; "+
getId("vidx")+"++) {\n");
cb.append(element.getType()+" "+getId("e1")+
" = "+fname+
".get("+getId("vidx")+");\n");
cb.append(element.getType()+" "+getId("e2")+
" = "+other+
".get("+getId("vidx")+");\n");
element.genCompareTo(cb, getId("e1"), getId("e2"));
cb.append("if (ret != 0) { return ret; }\n");
cb.append("}\n");
cb.append("ret = ("+getId("len1")+" - "+getId("len2")+");\n");
cb.append("}\n");
}
void genReadMethod(CodeBuffer cb, String fname, String tag, boolean decl) {
if (decl) {
cb.append(getType()+" "+fname+";\n");
}
cb.append("{\n");
incrLevel();
cb.append("org.apache.hadoop.record.Index "+getId("vidx")+" = a_.startVector(\""+tag+"\");\n");
cb.append(fname+"=new "+getType()+"();\n");
cb.append("for (; !"+getId("vidx")+".done(); "+getId("vidx")+".incr()) {\n");
element.genReadMethod(cb, getId("e"), getId("e"), true);
cb.append(fname+".add("+getId("e")+");\n");
cb.append("}\n");
cb.append("a_.endVector(\""+tag+"\");\n");
decrLevel();
cb.append("}\n");
}
void genWriteMethod(CodeBuffer cb, String fname, String tag) {
cb.append("{\n");
incrLevel();
cb.append("a_.startVector("+fname+",\""+tag+"\");\n");
cb.append("int "+getId("len")+" = "+fname+".size();\n");
cb.append("for(int "+getId("vidx")+" = 0; "+getId("vidx")+"<"+getId("len")+"; "+getId("vidx")+"++) {\n");
cb.append(element.getType()+" "+getId("e")+" = "+fname+".get("+getId("vidx")+");\n");
element.genWriteMethod(cb, getId("e"), getId("e"));
cb.append("}\n");
cb.append("a_.endVector("+fname+",\""+tag+"\");\n");
cb.append("}\n");
decrLevel();
}
void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
cb.append("{\n");
incrLevel();
cb.append("int "+getId("vi")+
" = org.apache.hadoop.record.Utils.readVInt("+b+", "+s+");\n");
cb.append("int "+getId("vz")+
" = org.apache.hadoop.record.Utils.getVIntSize("+getId("vi")+");\n");
cb.append(s+"+="+getId("vz")+"; "+l+"-="+getId("vz")+";\n");
cb.append("for (int "+getId("vidx")+" = 0; "+getId("vidx")+
" < "+getId("vi")+"; "+getId("vidx")+"++)");
element.genSlurpBytes(cb, b,s,l);
decrLevel();
cb.append("}\n");
}
void genCompareBytes(CodeBuffer cb) {
cb.append("{\n");
incrLevel();
cb.append("int "+getId("vi1")+
" = org.apache.hadoop.record.Utils.readVInt(b1, s1);\n");
cb.append("int "+getId("vi2")+
" = org.apache.hadoop.record.Utils.readVInt(b2, s2);\n");
cb.append("int "+getId("vz1")+
" = org.apache.hadoop.record.Utils.getVIntSize("+getId("vi1")+");\n");
cb.append("int "+getId("vz2")+
" = org.apache.hadoop.record.Utils.getVIntSize("+getId("vi2")+");\n");
cb.append("s1+="+getId("vz1")+"; s2+="+getId("vz2")+
"; l1-="+getId("vz1")+"; l2-="+getId("vz2")+";\n");
cb.append("for (int "+getId("vidx")+" = 0; "+getId("vidx")+
" < "+getId("vi1")+" && "+getId("vidx")+" < "+getId("vi2")+
"; "+getId("vidx")+"++)");
element.genCompareBytes(cb);
cb.append("if ("+getId("vi1")+" != "+getId("vi2")+
") { return ("+getId("vi1")+"<"+getId("vi2")+")?-1:0; }\n");
decrLevel();
cb.append("}\n");
}
}
/** Creates a new instance of JVector */
public JVector(JType t) {
type = t;
setJavaType(new JavaVector(t.getJavaType()));
setCppType(new CppCompType(" ::std::vector<"+t.getCppType().getType()+">"));
setCType(new CCompType());
}
String getSignature() {
return "[" + type.getSignature() + "]";
}
}