Package org.apache.cayenne.query

Examples of org.apache.cayenne.query.QueryMetadata

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        this.query = query;
        this.cacheKey = cacheKey;
    }

    public QueryMetadata getMetaData(EntityResolver resolver) {
        final QueryMetadata metadata = query.getMetaData(resolver);

        // the way paginated queries work on the server is that they are never cached
        // (IncrementalFaultList interception happens before cache interception). So
        // overriding caching settings in the metadata will only affect
        // ClientServerChannel behavior

        return new QueryMetadata() {

            public Query getOrginatingQuery() {
                return null;
            }

            public String getCacheKey() {
                return cacheKey;
            }

            public List<Object> getResultSetMapping() {
                return metadata.getResultSetMapping();
            }

            public String[] getCacheGroups() {
                return metadata.getCacheGroups();
            }

            /**
             * @deprecated since 3.0 in favor of 'getCacheStrategy'.
             */
            public String getCachePolicy() {
                return metadata.getCachePolicy();
            }

            /**
             * @since 3.0
             */
            public QueryCacheStrategy getCacheStrategy() {
                return metadata.getCacheStrategy();
            }

            public DataMap getDataMap() {
                return metadata.getDataMap();
            }

            public DbEntity getDbEntity() {
                return metadata.getDbEntity();
            }

            public int getFetchLimit() {
                return metadata.getFetchLimit();
            }

            public int getFetchOffset() {
                return metadata.getFetchOffset();
            }

            /**
             * @deprecated since 3.0
             */
            public int getFetchStartIndex() {
                return metadata.getFetchStartIndex();
            }

            public ObjEntity getObjEntity() {
                return metadata.getObjEntity();
            }

            public ClassDescriptor getClassDescriptor() {
                return metadata.getClassDescriptor();
            }

            public int getPageSize() {
                return metadata.getPageSize();
            }

            public PrefetchTreeNode getPrefetchTree() {
                return metadata.getPrefetchTree();
            }

            public Procedure getProcedure() {
                return metadata.getProcedure();
            }

            public Map<String, String> getPathSplitAliases() {
                return metadata.getPathSplitAliases();
            }

            public boolean isFetchingDataRows() {
                return metadata.isFetchingDataRows();
            }

            /**
             * @deprecated since 3.0
             */
            public boolean isRefreshingObjects() {
                return metadata.isRefreshingObjects();
            }

            /**
             * @deprecated since 3.0. Inheritance resolving is not optional anymore.
             */
            public boolean isResolvingInherited() {
                return metadata.isResolvingInherited();
            }
        };
    }
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        this.cacheKey = cacheKey;
    }

    @Override
    public QueryMetadata getMetaData(EntityResolver resolver) {
        final QueryMetadata metadata = query.getMetaData(resolver);

        // the way paginated queries work on the server is that they are never cached
        // (IncrementalFaultList interception happens before cache interception). So
        // overriding caching settings in the metadata will only affect
        // ClientServerChannel behavior

        return new QueryMetadata() {

            public Query getOrginatingQuery() {
                return null;
            }

            public String getCacheKey() {
                return cacheKey;
            }

            public List<Object> getResultSetMapping() {
                return metadata.getResultSetMapping();
            }

            public String[] getCacheGroups() {
                return metadata.getCacheGroups();
            }

            /**
             * @deprecated since 3.0 in favor of 'getCacheStrategy'.
             */
            public String getCachePolicy() {
                return metadata.getCachePolicy();
            }

            public QueryCacheStrategy getCacheStrategy() {
                return metadata.getCacheStrategy();
            }

            public DataMap getDataMap() {
                return metadata.getDataMap();
            }

            public DbEntity getDbEntity() {
                return metadata.getDbEntity();
            }

            public int getFetchLimit() {
                return metadata.getFetchLimit();
            }

            public int getFetchOffset() {
                return metadata.getFetchOffset();
            }

            /**
             * @deprecated since 3.0
             */
            public int getFetchStartIndex() {
                return metadata.getFetchStartIndex();
            }

            public ObjEntity getObjEntity() {
                return metadata.getObjEntity();
            }

            public ClassDescriptor getClassDescriptor() {
                return metadata.getClassDescriptor();
            }

            public int getPageSize() {
                return metadata.getPageSize();
            }

            public PrefetchTreeNode getPrefetchTree() {
                return metadata.getPrefetchTree();
            }

            public Procedure getProcedure() {
                return metadata.getProcedure();
            }

            public Map<String, String> getPathSplitAliases() {
                return metadata.getPathSplitAliases();
            }

            public boolean isFetchingDataRows() {
                return metadata.isFetchingDataRows();
            }

            public boolean isRefreshingObjects() {
                return metadata.isRefreshingObjects();
            }

            public boolean isResolvingInherited() {
                return metadata.isResolvingInherited();
            }
        };
    }
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        });

        SQLTemplate sqlQuery = context.getQuery();

        // update with metadata
        QueryMetadata md = query.getMetaData(getEntityResolver());
        sqlQuery.setFetchLimit(md.getFetchLimit());

        actionFactory.sqlAction(sqlQuery).performAction(connection, observer);
    }
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        this.fetchingDataRows = rootMetadata.isFetchingDataRows();
        this.prefetchTree = rootMetadata.getPrefetchTree();
    }

    public QueryMetadata getMetaData(EntityResolver resolver) {
        return new QueryMetadata() {
           
            public SQLResultSetMapping getResultSetMapping() {
                return null;
            }
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        this.query = query;
        this.cacheKey = cacheKey;
    }

    public QueryMetadata getMetaData(EntityResolver resolver) {
        final QueryMetadata metadata = query.getMetaData(resolver);

        // the way paginated queries work on the server is that they are never cached
        // (IncrementalFaultList interception happens before cache interception). So
        // overriding caching settings in the metadata will only affect
        // ClientServerChannel behavior

        return new QueryMetadata() {

            public String getCacheKey() {
                return cacheKey;
            }
           
            public SQLResultSetMapping getResultSetMapping() {
                return metadata.getResultSetMapping();
            }
           
            public String[] getCacheGroups() {
                return metadata.getCacheGroups();
            }

            public String getCachePolicy() {
                return metadata.getCachePolicy();
            }

            public DataMap getDataMap() {
                return metadata.getDataMap();
            }

            public DbEntity getDbEntity() {
                return metadata.getDbEntity();
            }

            public int getFetchLimit() {
                return metadata.getFetchLimit();
            }

            public int getFetchStartIndex() {
                return metadata.getFetchStartIndex();
            }

            public ObjEntity getObjEntity() {
                return metadata.getObjEntity();
            }
           
            public ClassDescriptor getClassDescriptor() {
                return metadata.getClassDescriptor();
            }

            public int getPageSize() {
                return metadata.getPageSize();
            }

            public PrefetchTreeNode getPrefetchTree() {
                return metadata.getPrefetchTree();
            }

            public Procedure getProcedure() {
                return metadata.getProcedure();
            }

            public boolean isFetchingDataRows() {
                return metadata.isFetchingDataRows();
            }

            public boolean isRefreshingObjects() {
                return metadata.isRefreshingObjects();
            }

            public boolean isResolvingInherited() {
                return metadata.isResolvingInherited();
            }
        };
    }
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        this.cacheKey = cacheKey;
    }

    @Override
    public QueryMetadata getMetaData(EntityResolver resolver) {
        final QueryMetadata metadata = query.getMetaData(resolver);

        // the way paginated queries work on the server is that they are never cached
        // (IncrementalFaultList interception happens before cache interception). So
        // overriding caching settings in the metadata will only affect
        // ClientServerChannel behavior

        return new QueryMetadata() {

            public String getCacheKey() {
                return cacheKey;
            }

            public SQLResultSetMapping getResultSetMapping() {
                return metadata.getResultSetMapping();
            }

            public String[] getCacheGroups() {
                return metadata.getCacheGroups();
            }

            public String getCachePolicy() {
                return metadata.getCachePolicy();
            }

            public DataMap getDataMap() {
                return metadata.getDataMap();
            }

            public DbEntity getDbEntity() {
                return metadata.getDbEntity();
            }

            public int getFetchLimit() {
                return metadata.getFetchLimit();
            }

            public int getFetchStartIndex() {
                return metadata.getFetchStartIndex();
            }

            public ObjEntity getObjEntity() {
                return metadata.getObjEntity();
            }

            public ClassDescriptor getClassDescriptor() {
                return metadata.getClassDescriptor();
            }

            public int getPageSize() {
                return metadata.getPageSize();
            }

            public PrefetchTreeNode getPrefetchTree() {
                return metadata.getPrefetchTree();
            }

            public Procedure getProcedure() {
                return metadata.getProcedure();
            }

            public boolean isFetchingDataRows() {
                return metadata.isFetchingDataRows();
            }

            public boolean isRefreshingObjects() {
                return metadata.isRefreshingObjects();
            }

            public boolean isResolvingInherited() {
                return metadata.isResolvingInherited();
            }
        };
    }
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        // (assuming all lists are mutable)

        if (context != null) {

            EntityResolver resolver = context.getEntityResolver();
            QueryMetadata info = query.getMetaData(resolver);

            if (!info.isFetchingDataRows()) {

                response.reset();

                while (response.next()) {
                    if (response.isList()) {
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    @Override
    public String createSqlString() throws Exception {

        String sqlString = super.createSqlString();

        QueryMetadata info = getQuery().getMetaData(getEntityResolver());
        if (info.getFetchLimit() > 0) {
            sqlString = "SELECT * FROM ("
                    + sqlString
                    + ") WHERE rownum <= "
                    + info.getFetchLimit();
        }

        return sqlString;
    }
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            // a joint prefetch warrants full row compare

            final boolean[] compareFullRows = new boolean[1];

            QueryMetadata md = query.getMetaData(getEntityResolver());
            final PrefetchTreeNode rootPrefetch = md.getPrefetchTree();

            if (rootPrefetch != null) {
                rootPrefetch.traverse(new PrefetchProcessor() {

                    public void finishPrefetch(PrefetchTreeNode node) {
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     *            objects.
     * @param query Main query used to retrieve data. Must have "pageSize" property set to
     *            a value greater than zero.
     */
    public IncrementalFaultList(DataContext dataContext, Query query) {
        QueryMetadata metadata = query.getMetaData(dataContext.getEntityResolver());
        if (metadata.getPageSize() <= 0) {
            throw new CayenneRuntimeException(
                    "IncrementalFaultList does not support unpaged queries. Query page size is "
                            + metadata.getPageSize());
        }

        this.dataContext = dataContext;
        this.pageSize = metadata.getPageSize();
        this.rootEntity = metadata.getObjEntity();

        // create an internal query, it is a partial replica of
        // the original query and will serve as a value holder for
        // various parameters
        this.internalQuery = new SelectQuery(rootEntity);
        this.internalQuery.setFetchingDataRows(metadata.isFetchingDataRows());
        this.internalQuery.setResolvingInherited(metadata.isResolvingInherited());

        if (metadata.isFetchingDataRows()) {
            helper = new DataRowListHelper();
        }
        else {
            helper = new PersistentListHelper();
        }

        boolean resolvesFirstPage = true;

        if (!metadata.isFetchingDataRows() && (query instanceof SelectQuery)) {
            SelectQuery select = (SelectQuery) query;

            this.internalQuery.setPrefetchTree(select.getPrefetchTree());

            // optimize SelectQuery:
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Related Classes of org.apache.cayenne.query.QueryMetadata

  • org.apache.cayenne.access.DataContext
  • org.apache.cayenne.access.DataContextQueryCachingTest
  • org.apache.cayenne.access.DataContextTest
  • org.apache.cayenne.access.IncrementalFaultList
  • org.apache.cayenne.access.jdbc.BaseSQLAction
  • org.apache.cayenne.access.jdbc.EJBQLAction
  • org.apache.cayenne.access.jdbc.SelectAction
  • org.apache.cayenne.access.PrefetchProcessorTreeBuilderTest
  • org.apache.cayenne.access.select.EntityTreeSegmentBuilderTest
  • org.apache.cayenne.access.util.SelectObserver
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