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ResultMatcher.java
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ResultMatcher.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cypher.feature.parser.matchers;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.neo4j.graphdb.Result;
import static cypher.feature.parser.matchers.UnorderedListMatcher.findMatch;
public class ResultMatcher implements Matcher<Result>
{
private final List<RowMatcher> rowMatchers;
public ResultMatcher( List<RowMatcher> rowMatchers )
{
this.rowMatchers = rowMatchers;
}
@Override
public boolean matches( Result value )
{
List<RowMatcher> mutableCopy = new ArrayList<>( rowMatchers );
final boolean[] matched = { true };
List<String> columns = value.columns();
value.accept( row -> {
Map<String,Object> nextRow = new HashMap<>( columns.size() );
for ( String col : columns )
{
nextRow.put( col, row.get( col ) );
}
int index = findMatch( mutableCopy, nextRow );
if ( index < 0 )
{
matched[0] = false;
return true; // we always want to visit the next row
}
mutableCopy.remove( index );
return true;
} );
boolean nothingLeftInMatcher = mutableCopy.isEmpty();
return matched[0] && nothingLeftInMatcher;
}
public boolean matchesOrdered( Result value )
{
final int[] counter = { 0 };
final boolean[] matched = { true };
List<String> columns = value.columns();
value.accept( row -> {
Map<String,Object> nextRow = new HashMap<>( columns.size() );
for ( String col : columns )
{
nextRow.put( col, row.get( col ) );
}
if ( counter[0] >= rowMatchers.size() )
{
matched[0] = false;
return true; // we always want to visit the next row
}
matched[0] = rowMatchers.get( counter[0]++ ).matches( nextRow );
return true;
} );
boolean nothingLeftInMatcher = counter[0] == rowMatchers.size();
return matched[0] && nothingLeftInMatcher;
}
@Override
public String toString()
{
StringBuilder sb = new StringBuilder( "Expected result of:\n" );
int i = 1;
for ( RowMatcher row : rowMatchers )
{
sb.append( "[" ).append( i++ ).append( "] " ).append( row ).append( "\n" );
}
return sb.toString();
}
}