| /* |
| * 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.jena.sparql.algebra.op; |
| |
| import org.apache.jena.atlas.io.IndentedWriter ; |
| import org.apache.jena.sparql.algebra.Op ; |
| import org.apache.jena.sparql.serializer.SerializationContext ; |
| import org.apache.jena.sparql.sse.writers.WriterOp ; |
| import org.apache.jena.sparql.util.NodeIsomorphismMap ; |
| import org.apache.jena.sparql.util.PrintSerializableBase ; |
| |
| public abstract class OpBase extends PrintSerializableBase implements Op |
| { |
| @Override |
| public abstract int hashCode() ; |
| @Override |
| public abstract boolean equalTo(Op other, NodeIsomorphismMap labelMap) ; |
| |
| @Override |
| final public boolean equals(Object other) |
| { |
| if ( other == null ) return false; |
| if ( this == other ) return true ; |
| |
| if ( ! ( other instanceof Op ) ) |
| return false ; |
| return equalTo((Op)other, null) ; |
| } |
| |
| @Override |
| public void output(IndentedWriter out) |
| { |
| output(out, null) ; |
| } |
| |
| @Override |
| public void output(IndentedWriter out, SerializationContext sCxt) |
| { |
| int line = out.getRow() ; |
| WriterOp.output(out, this, sCxt) ; |
| if ( line != out.getRow() ) |
| out.ensureStartOfLine() ; |
| } |
| |
| // Constants used in hashing to stop an element and it's subelement |
| // (if just one) having the same hash. That isn't usualy any problem but |
| // it's easy to avoid so we do. |
| |
| static final int HashBasicGraphPattern = 0xB1 ; |
| // static final int HashGroup = 0xB2 ; |
| // static final int HashUnion = 0xB3 ; |
| // static final int HashLeftJoin = 0xB4 ; |
| static final int HashDistinct = 0xB5 ; |
| static final int HashReduced = 0xB5 ; |
| static final int HashToList = 0xB6 ; |
| static final int HashNull = 0xB7 ; |
| static final int HashSequence = 0xB8 ; |
| static final int HashLabel = 0xB9 ; |
| static final int HashTriple = 0xBA ; |
| static final int HashQuad = 0xBB ; |
| static final int HashQuadBlock = 0xBC ; |
| |
| |
| } |