Package com.avoka.core.cayenne

Class SelectQueryJoinTranslator

java.lang.Object
org.apache.cayenne.access.translator.select.QueryAssembler
org.apache.cayenne.access.translator.select.DefaultSelectTranslator
com.avoka.core.cayenne.SelectQueryJoinTranslator
All Implemented Interfaces:
org.apache.cayenne.access.translator.select.SelectTranslator
public class SelectQueryJoinTranslator extends org.apache.cayenne.access.translator.select.DefaultSelectTranslator
Add to a SQL SELECT by specifying custom JOIN expressions and additional WHERE clauses
Since:
19.5.0

  • Nested Class Summary

    Nested classes/interfaces inherited from class org.apache.cayenne.access.translator.select.QueryAssembler

    org.apache.cayenne.access.translator.select.QueryAssembler.AddBindingListener

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    PLACEHOLDER_TARGET_TABLE_ALIAS
    The placeholder for the target table (main table the SelectQuery is based on) that can be used in additionalJoinString and additionalClauseString

    Fields inherited from class org.apache.cayenne.access.translator.select.DefaultSelectTranslator

    UNSUPPORTED_DISTINCT_TYPES

    Fields inherited from class org.apache.cayenne.access.translator.select.QueryAssembler

    adapter, addBindingListener, bindings, entityResolver, query, queryMetadata, sql, translated

  • Constructor Summary

    Constructors
    Constructor
    Description
    SelectQueryJoinTranslator(org.apache.cayenne.query.Query query, org.apache.cayenne.dba.DbAdapter adapter, org.apache.cayenne.map.EntityResolver entityResolver)
    Create a SelectQueryJoinTranslator instance

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    doTranslate()
     
    protected int
    getWhereEndIndex()
     
    boolean
    isUseCountQuery()
    Return whether the translator will change the SELECT query to a SELECT COUNT query, returning the number of rows rather than the rows themselves.
    void
    setAdditionalClauseString(String additionalClauseString)
    The string to be inserted at the end of the FROM section of the select query.
    void
    setAdditionalJoinParameters(List<Pair<org.apache.cayenne.map.DbAttribute,Object>> additionalJoinParameters)
    Query parameters to be used in the additional join string.
    void
    setAdditionalJoinString(String additionalJoinString)
    The string to be inserted at the end of the FROM section of the select query.
    void
    setUseCountQuery(boolean useCountQuery)
    If true, the translater will change the SELECT query to a SELECT COUNT query, returning the number of rows rather than the rows themselves.

    Methods inherited from class org.apache.cayenne.access.translator.select.DefaultSelectTranslator

    appendGroupByColumn, appendGroupByColumns, appendLimitAndOffsetClauses, appendSelectColumns, buildDistinctStatement, buildResultColumns, createJoinStack, dbRelationshipAdded, getAliasForExpression, getAttributeOverrides, getCurrentAlias, getJoinStack, getResultColumns, hasJoins, isSuppressingDistinct, isUnsupportedForDistinct, resetJoinStack, supportsTableAliases

    Methods inherited from class org.apache.cayenne.access.translator.select.QueryAssembler

    addToParamList, ensureTranslated, getAdapter, getBindings, getEntityResolver, getPathAliases, getQuery, getQueryMetadata, getSql, setAddBindingListener

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface org.apache.cayenne.access.translator.select.SelectTranslator

    getBindings, getSql

  • Field Details

    • PLACEHOLDER_TARGET_TABLE_ALIAS

      public static final String PLACEHOLDER_TARGET_TABLE_ALIAS
      The placeholder for the target table (main table the SelectQuery is based on) that can be used in additionalJoinString and additionalClauseString
      See Also:

  • Constructor Details

    • SelectQueryJoinTranslator

      public SelectQueryJoinTranslator(org.apache.cayenne.query.Query query, org.apache.cayenne.dba.DbAdapter adapter, org.apache.cayenne.map.EntityResolver entityResolver)
      Create a SelectQueryJoinTranslator instance
      Parameters:
      query - the SelectQuery (required)
      adapter - the DbAdapter (required)
      entityResolver - the Cayenne entity resolver (required)

  • Method Details

    • setAdditionalJoinString

      public void setAdditionalJoinString(String additionalJoinString)
      The string to be inserted at the end of the FROM section of the select query. Aliasing needs to be done by the caller and match aliasing in the additionalClauseString. You can reference the alias of the target table name by using {@link this.PLACEHOLDER_TARGET_TABLE_ALIAS} You can also
      Parameters:
      additionalJoinString - the additional join string (e.g. LEFT JOIN with additional criteria) Example: setAdditionalJoinString("LEFT JOIN job_property jp1 ON (" + SelectQueryJoinTranslator.PLACEHOLDER_TARGET_TABLE_ALIAS + ".job_oid = jp1.job_oid AND jp1.name = ?)")

    • setAdditionalJoinParameters

      public void setAdditionalJoinParameters(List<Pair<org.apache.cayenne.map.DbAttribute,Object>> additionalJoinParameters)
      Query parameters to be used in the additional join string. If specified, the bindings for these parameters will be inserted at the start of the binding list.
      Parameters:
      additionalJoinParameters - the additional join parameters (as pairs of DbAttributes and the value to be bound)

    • setAdditionalClauseString

      public void setAdditionalClauseString(String additionalClauseString)
      The string to be inserted at the end of the FROM section of the select query. Aliasing needs to be done by the caller and match aliasing in the additionalClauseString. You can reference the alias of the target table name by using {@link this.PLACEHOLDER_TARGET_TABLE_ALIAS} DO NOT include a leading "WHERE" or "AND" keyword as this will be inserted by the translator as needed.
      Parameters:
      additionalClauseString - the additional where clause string Example: setAdditionalClauseString("(jp1.value IS NULL)")

    • isUseCountQuery

      public boolean isUseCountQuery()
      Return whether the translator will change the SELECT query to a SELECT COUNT query, returning the number of rows rather than the rows themselves.
      Returns:
      whether the query will be modified to a SELECT COUNT query

    • setUseCountQuery

      public void setUseCountQuery(boolean useCountQuery)
      If true, the translater will change the SELECT query to a SELECT COUNT query, returning the number of rows rather than the rows themselves.
      Parameters:
      useCountQuery - whether the query should be modified to a SELECT COUNT query (off by default)

    • doTranslate

      protected void doTranslate()
      Overrides:
      doTranslate in class org.apache.cayenne.access.translator.select.DefaultSelectTranslator

    • getWhereEndIndex

      protected int getWhereEndIndex()