Examples with ResultMap org.apache.ibatis.mapping.ResultMap used on opensource projects

Example 6 with ResultMap

use of org.apache.ibatis.mapping.ResultMap in project mybatis-3 by mybatis.

the class DefaultResultSetHandler method applyNestedResultMappings.

//
// NESTED RESULT MAP (JOIN MAPPING)
//
private boolean applyNestedResultMappings(ResultSetWrapper rsw, ResultMap resultMap, MetaObject metaObject, String parentPrefix, CacheKey parentRowKey, boolean newObject) {
    boolean foundValues = false;
    for (ResultMapping resultMapping : resultMap.getPropertyResultMappings()) {
        final String nestedResultMapId = resultMapping.getNestedResultMapId();
        if (nestedResultMapId != null && resultMapping.getResultSet() == null) {
            try {
                final String columnPrefix = getColumnPrefix(parentPrefix, resultMapping);
                final ResultMap nestedResultMap = getNestedResultMap(rsw.getResultSet(), nestedResultMapId, columnPrefix);
                if (resultMapping.getColumnPrefix() == null) {
                    // try to fill circular reference only when columnPrefix
                    // is not specified for the nested result map (issue #215)
                    Object ancestorObject = ancestorObjects.get(nestedResultMapId);
                    if (ancestorObject != null) {
                        if (newObject) {
                            // issue #385
                            linkObjects(metaObject, resultMapping, ancestorObject);
                        }
                        continue;
                    }
                }
                final CacheKey rowKey = createRowKey(nestedResultMap, rsw, columnPrefix);
                final CacheKey combinedKey = combineKeys(rowKey, parentRowKey);
                Object rowValue = nestedResultObjects.get(combinedKey);
                boolean knownValue = (rowValue != null);
                // mandatory
                instantiateCollectionPropertyIfAppropriate(resultMapping, metaObject);
                if (anyNotNullColumnHasValue(resultMapping, columnPrefix, rsw)) {
                    rowValue = getRowValue(rsw, nestedResultMap, combinedKey, columnPrefix, rowValue);
                    if (rowValue != null && !knownValue) {
                        linkObjects(metaObject, resultMapping, rowValue);
                        foundValues = true;
                    }
                }
            } catch (SQLException e) {
                throw new ExecutorException("Error getting nested result map values for '" + resultMapping.getProperty() + "'.  Cause: " + e, e);
            }
        }
    }
    return foundValues;
}

Example 7 with ResultMap

use of org.apache.ibatis.mapping.ResultMap in project mybatis-3 by mybatis.

the class DefaultResultSetHandler method createParameterizedResultObject.

Object createParameterizedResultObject(ResultSetWrapper rsw, Class<?> resultType, List<ResultMapping> constructorMappings, List<Class<?>> constructorArgTypes, List<Object> constructorArgs, String columnPrefix) {
    boolean foundValues = false;
    for (ResultMapping constructorMapping : constructorMappings) {
        final Class<?> parameterType = constructorMapping.getJavaType();
        final String column = constructorMapping.getColumn();
        final Object value;
        try {
            if (constructorMapping.getNestedQueryId() != null) {
                value = getNestedQueryConstructorValue(rsw.getResultSet(), constructorMapping, columnPrefix);
            } else if (constructorMapping.getNestedResultMapId() != null) {
                final ResultMap resultMap = configuration.getResultMap(constructorMapping.getNestedResultMapId());
                value = getRowValue(rsw, resultMap);
            } else {
                final TypeHandler<?> typeHandler = constructorMapping.getTypeHandler();
                value = typeHandler.getResult(rsw.getResultSet(), prependPrefix(column, columnPrefix));
            }
        } catch (ResultMapException e) {
            throw new ExecutorException("Could not process result for mapping: " + constructorMapping, e);
        } catch (SQLException e) {
            throw new ExecutorException("Could not process result for mapping: " + constructorMapping, e);
        }
        constructorArgTypes.add(parameterType);
        constructorArgs.add(value);
        foundValues = value != null || foundValues;
    }
    return foundValues ? objectFactory.create(resultType, constructorArgTypes, constructorArgs) : null;
}

Example 8 with ResultMap

use of org.apache.ibatis.mapping.ResultMap in project Mybatis-PageHelper by pagehelper.

the class MSUtils method newCountMappedStatement.

/**
     * 新建count查询和分页查询的MappedStatement
     *
     * @param ms
     * @return
     */
public static MappedStatement newCountMappedStatement(MappedStatement ms) {
    MappedStatement.Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms.getId() + COUNT, ms.getSqlSource(), ms.getSqlCommandType());
    builder.resource(ms.getResource());
    builder.fetchSize(ms.getFetchSize());
    builder.statementType(ms.getStatementType());
    builder.keyGenerator(ms.getKeyGenerator());
    if (ms.getKeyProperties() != null && ms.getKeyProperties().length != 0) {
        StringBuilder keyProperties = new StringBuilder();
        for (String keyProperty : ms.getKeyProperties()) {
            keyProperties.append(keyProperty).append(",");
        }
        keyProperties.delete(keyProperties.length() - 1, keyProperties.length());
        builder.keyProperty(keyProperties.toString());
    }
    builder.timeout(ms.getTimeout());
    builder.parameterMap(ms.getParameterMap());
    //count查询返回值int
    List<ResultMap> resultMaps = new ArrayList<ResultMap>();
    ResultMap resultMap = new ResultMap.Builder(ms.getConfiguration(), ms.getId(), Long.class, EMPTY_RESULTMAPPING).build();
    resultMaps.add(resultMap);
    builder.resultMaps(resultMaps);
    builder.resultSetType(ms.getResultSetType());
    builder.cache(ms.getCache());
    builder.flushCacheRequired(ms.isFlushCacheRequired());
    builder.useCache(ms.isUseCache());
    return builder.build();
}

Example 9 with ResultMap

use of org.apache.ibatis.mapping.ResultMap in project mybatis-3 by mybatis.

the class DefaultResultSetHandler method handleRowValuesForNestedResultMap.

//
// HANDLE NESTED RESULT MAPS
//
private void handleRowValuesForNestedResultMap(ResultSetWrapper rsw, ResultMap resultMap, ResultHandler<?> resultHandler, RowBounds rowBounds, ResultMapping parentMapping) throws SQLException {
    final DefaultResultContext<Object> resultContext = new DefaultResultContext<Object>();
    skipRows(rsw.getResultSet(), rowBounds);
    Object rowValue = previousRowValue;
    while (shouldProcessMoreRows(resultContext, rowBounds) && rsw.getResultSet().next()) {
        final ResultMap discriminatedResultMap = resolveDiscriminatedResultMap(rsw.getResultSet(), resultMap, null);
        final CacheKey rowKey = createRowKey(discriminatedResultMap, rsw, null);
        Object partialObject = nestedResultObjects.get(rowKey);
        // issue #577 && #542
        if (mappedStatement.isResultOrdered()) {
            if (partialObject == null && rowValue != null) {
                nestedResultObjects.clear();
                storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
            }
            rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, null, partialObject);
        } else {
            rowValue = getRowValue(rsw, discriminatedResultMap, rowKey, null, partialObject);
            if (partialObject == null) {
                storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
            }
        }
    }
    if (rowValue != null && mappedStatement.isResultOrdered() && shouldProcessMoreRows(resultContext, rowBounds)) {
        storeObject(resultHandler, resultContext, rowValue, parentMapping, rsw.getResultSet());
        previousRowValue = null;
    } else if (rowValue != null) {
        previousRowValue = rowValue;
    }
}

Example 10 with ResultMap

use of org.apache.ibatis.mapping.ResultMap in project mybatis-3 by mybatis.

the class DefaultResultSetHandler method handleResultSets.

//
// HANDLE RESULT SETS
//
@Override
public List<Object> handleResultSets(Statement stmt) throws SQLException {
    ErrorContext.instance().activity("handling results").object(mappedStatement.getId());
    final List<Object> multipleResults = new ArrayList<Object>();
    int resultSetCount = 0;
    ResultSetWrapper rsw = getFirstResultSet(stmt);
    List<ResultMap> resultMaps = mappedStatement.getResultMaps();
    int resultMapCount = resultMaps.size();
    validateResultMapsCount(rsw, resultMapCount);
    while (rsw != null && resultMapCount > resultSetCount) {
        ResultMap resultMap = resultMaps.get(resultSetCount);
        handleResultSet(rsw, resultMap, multipleResults, null);
        rsw = getNextResultSet(stmt);
        cleanUpAfterHandlingResultSet();
        resultSetCount++;
    }
    String[] resultSets = mappedStatement.getResultSets();
    if (resultSets != null) {
        while (rsw != null && resultSetCount < resultSets.length) {
            ResultMapping parentMapping = nextResultMaps.get(resultSets[resultSetCount]);
            if (parentMapping != null) {
                String nestedResultMapId = parentMapping.getNestedResultMapId();
                ResultMap resultMap = configuration.getResultMap(nestedResultMapId);
                handleResultSet(rsw, resultMap, null, parentMapping);
            }
            rsw = getNextResultSet(stmt);
            cleanUpAfterHandlingResultSet();
            resultSetCount++;
        }
    }
    return collapseSingleResultList(multipleResults);
}