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## org.apache.cayenne.access.jdbc
Class EJBQLTranslationContext

    java.lang.Object
      org.apache.cayenne.access.jdbc.EJBQLTranslationContext

    public class EJBQLTranslationContext

extends Object

A context used for translating of EJBQL to SQL.

Since:
  3.0

Field Summary
`protected Map<String,Object>` | `namedParameters`
`protected Map<Integer,Object>` | `positionalParameters`

Constructor Summary
`EJBQLTranslationContext(EntityResolver entityResolver, EJBQLQuery query, EJBQLCompiledExpression compiledExpression, EJBQLTranslatorFactory translatorFactory)`

Method Summary
`EJBQLTranslationContext` | `append(char chunk)` Appends a piece of SQL to the internal buffer.
`EJBQLTranslationContext` | `append(String chunk)` Appends a piece of SQL to the internal buffer.
`ClassDescriptor` | `getEntityDescriptor(String id)` Looks up entity descriptor for an identifier that can be a compiled expression id or one of the aliases.
`QueryMetadata` | `getMetadata()`
`protected String` | `getTableAlias(String idPath, String tableName)` Retrieves a SQL alias for the combination of EJBQL id variable and a table name.
`boolean` | `isAppendingResultColumns()`
`boolean` | `isUsingAliases()`
`String` | `makeDistinctMarker()`
`void` | `onSubselect()`
`void` | `pushMarker(String marker, boolean reset)` Switches the current buffer to a marked buffer, pushing the currently used buffer on the stack.
`void` | `setUsingAliases(boolean useAliases)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### namedParameters

    protected Map<String,Object> namedParameters

### positionalParameters

    protected Map<Integer,Object> positionalParameters

Constructor Detail

### EJBQLTranslationContext

    public EJBQLTranslationContext(EntityResolver entityResolver,
                                   EJBQLQuery query,
                                   EJBQLCompiledExpression compiledExpression,
                                   EJBQLTranslatorFactory translatorFactory)

Method Detail

### getMetadata

    public QueryMetadata getMetadata()

### getEntityDescriptor

    public ClassDescriptor getEntityDescriptor(String id)

  Looks up entity descriptor for an identifier that can be a compiled expression id or one of the aliases.

### pushMarker

    public void pushMarker(String marker,
                           boolean reset)

  Switches the current buffer to a marked buffer, pushing the currently used buffer on the stack. Note that this can be done even before the marker is inserted in the main buffer. If "reset" is true, any previous contents of the marker are cleared.

### append

    public EJBQLTranslationContext append(String chunk)

  Appends a piece of SQL to the internal buffer.

### append

    public EJBQLTranslationContext append(char chunk)

  Appends a piece of SQL to the internal buffer.

### getTableAlias

    protected String getTableAlias(String idPath,
                                   String tableName)

  Retrieves a SQL alias for the combination of EJBQL id variable and a table name. If such alias hasn't been used, it is created on the fly.

### isAppendingResultColumns

    public boolean isAppendingResultColumns()

### isUsingAliases

    public boolean isUsingAliases()

### setUsingAliases

    public void setUsingAliases(boolean useAliases)

### onSubselect

    public void onSubselect()

### makeDistinctMarker

    public String makeDistinctMarker()

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