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java.lang.Object org.apache.openjpa.kernel.exps.AbstractExpressionBuilder org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder
public class JPQLExpressionBuilder
Builder for JPQL expressions. This class takes the query parsed
in JPQLExpressionBuilder.ParsedJPQL
and converts it to an expression tree using
an ExpressionFactory
. Public for unit testing purposes.
Nested Class Summary | |
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protected static class |
JPQLExpressionBuilder.JPQLNode
Base node that will be generated by the JPQLExpressionBuilder; base class of the SimpleNode that is used by JPQLExpressionBuilder.ParsedJPQL . |
static class |
JPQLExpressionBuilder.ParsedJPQL
Public for unit testing purposes. |
Field Summary |
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Fields inherited from class org.apache.openjpa.kernel.exps.AbstractExpressionBuilder |
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CONTAINS_TYPE_ELEMENT, CONTAINS_TYPE_KEY, CONTAINS_TYPE_VALUE, EX_FATAL, EX_UNSUPPORTED, EX_USER, factory, resolver, TYPE_CHAR_OBJ, TYPE_COLLECTION, TYPE_MAP, TYPE_NUMBER, TYPE_OBJECT, TYPE_STRING |
Fields inherited from interface org.apache.openjpa.kernel.jpql.JPQLTreeConstants |
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JJTABS, JJTABSTRACTSCHEMANAME, JJTADD, JJTAGGREGATE, JJTALL, JJTAND, JJTANY, JJTASCENDING, JJTAVERAGE, JJTBETWEEN, JJTBOOLEANLITERAL, JJTCASE, JJTCLASSNAME, JJTCOALESCE, JJTCOLLECTIONPARAMETER, JJTCONCAT, JJTCONSTRUCTOR, JJTCONSTRUCTORPARAM, JJTCONSTRUCTORPARAMS, JJTCOUNT, JJTCURRENTDATE, JJTCURRENTTIME, JJTCURRENTTIMESTAMP, JJTDATELITERAL, JJTDECIMALLITERAL, JJTDELETE, JJTDESCENDING, JJTDISTINCT, JJTDISTINCTPATH, JJTDIVIDE, JJTENTRY, JJTEQUALS, JJTESCAPECHARACTER, JJTEXISTS, JJTFROM, JJTFROMITEM, JJTGENERALCASE, JJTGENERALIDENTIFIER, JJTGREATEROREQUAL, JJTGREATERTHAN, JJTGROUPBY, JJTGROUPBYEXTENSION, JJTHAVING, JJTIDENTIFICATIONVARIABLE, JJTIDENTIFIER, JJTIN, JJTINDEX, JJTINNERFETCHJOIN, JJTINNERJOIN, JJTINTEGERLITERAL, JJTISEMPTY, JJTISNULL, JJTKEY, JJTLENGTH, JJTLESSOREQUAL, JJTLESSTHAN, JJTLIKE, JJTLOCATE, JJTLOWER, JJTMAX, JJTMEMBEROF, JJTMIN, JJTMOD, JJTMULTIPLY, JJTNAMEDINPUTPARAMETER, JJTNEGATIVE, jjtNodeName, JJTNOT, JJTNOTEQUALS, JJTNULLIF, JJTOR, JJTORDERBY, JJTORDERBYEXTENSION, JJTORDERBYITEM, JJTOUTERFETCHJOIN, JJTOUTERJOIN, JJTPATH, JJTPATTERNVALUE, JJTPOSITIONALINPUTPARAMETER, JJTQUALIFIEDIDENTIFIER, JJTQUALIFIEDPATH, JJTSCALAREXPRESSION, JJTSELECT, JJTSELECTCLAUSE, JJTSELECTEXPRESSION, JJTSELECTEXPRESSIONS, JJTSELECTEXTENSION, JJTSIMPLECASE, JJTSIZE, JJTSQRT, JJTSTRINGLITERAL, JJTSUBSELECT, JJTSUBSTRING, JJTSUBTRACT, JJTSUM, JJTTIMELITERAL, JJTTIMESTAMPLITERAL, JJTTOK, JJTTRIM, JJTTRIMBOTH, JJTTRIMCHARACTER, JJTTRIMLEADING, JJTTRIMTRAILING, JJTTYPE, JJTTYPELITERAL, JJTUPDATE, JJTUPDATEITEM, JJTUPDATEVALUE, JJTUPPER, JJTVALUE, JJTVOID, JJTWHEN, JJTWHENSCALAR, JJTWHERE |
Constructor Summary | |
---|---|
JPQLExpressionBuilder(ExpressionFactory factory,
ExpressionStoreQuery query,
Object parsedQuery)
Constructor. |
Method Summary | |
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protected void |
addSchemaToContext(String id,
ClassMetaData meta)
Register the schema alias to the current JPQL query context. |
protected void |
addVariableToContext(String id,
Value var)
Register the variable associated with the schema alias (id) to the current JPQL query context. |
static void |
checkEmbeddable(Value val,
String currentQuery)
|
static Value |
convertSubstringArguments(ExpressionFactory factory,
Value val1,
Value val2,
Value val3)
Converts JPQL substring() function to OpenJPA ExpressionFactory substring() arguments. |
protected String |
currentQuery()
Returns the current string being parsed; used for error messages. |
protected Expression |
evalFetchJoins(QueryExpressions exps)
|
protected void |
evalSetClause(QueryExpressions exps)
|
protected ClassMetaData |
getCandidateMetaData(JPQLExpressionBuilder.JPQLNode node)
|
protected ClassLoader |
getClassLoader()
Returns the class loader that should be used for resolving class names (in addition to the resolver in the query). |
protected Class<?> |
getDeclaredVariableType(String name)
Returns the type of the named variable if it has been declared. |
protected Value |
getDefinedVariable(String id)
|
protected Localizer |
getLocalizer()
Used for obtaining the Localizer to use for translating
error messages. |
protected JPQLExpressionBuilder.ParsedJPQL |
getParsedQuery()
|
protected JPQLExpressionBuilder.ParsedJPQL |
getParsedQuery(String jpql)
|
(package private) QueryExpressions |
getQueryExpressions()
|
protected Value |
getVariable(String var)
Returns the variable associated with the schema alias (id). |
protected Value |
getVariable(String id,
boolean bind)
Identification variables in JPQL are case insensitive, so lower-case all variables we are going to bind. |
protected boolean |
isDeclaredVariable(String name)
Returns whether the specified variable name has been explicitly declared. |
(package private) boolean |
isPath(JPQLExpressionBuilder.JPQLNode node)
Check to see if the specific node is a path (vs. |
protected boolean |
isSeenVariable(String var)
Return whether the given id has been used as a variable. |
protected ClassMetaData |
resolveClassMetaData(JPQLExpressionBuilder.JPQLNode node)
|
void |
setImplicitTypes(Value val1,
Value val2,
Class<?> expected)
Set the implicit types of the given values based on the fact that they're used together, and based on the operator type. |
static void |
setImplicitTypes(Value val1,
Value val2,
Class<?> expected,
Resolver resolver,
OrderedMap<Object,Class<?>> parameterTypes,
String currentQuery)
|
Methods inherited from class org.apache.openjpa.kernel.exps.AbstractExpressionBuilder |
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addAccessPath, assertUnboundVariablesValid, bind, convertTypes, convertTypesQuotedNumbers, createVariable, getAccessPath, getMetaData, getMetaData, isBound, isNumeric, parseException, setImplicitContainsTypes, setImplicitType, setImplicitTypes, traversePath, traversePath, traverseStaticField, traverseXPath |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.openjpa.kernel.jpql.JPQLTreeConstants |
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|
Constructor Detail |
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public JPQLExpressionBuilder(ExpressionFactory factory, ExpressionStoreQuery query, Object parsedQuery)
factory
- the expression factory to usequery
- used to resolve variables, parameters,
and class names used in the queryparsedQuery
- the parsed queryMethod Detail |
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protected Localizer getLocalizer()
AbstractExpressionBuilder
Localizer
to use for translating
error messages.
getLocalizer
in class AbstractExpressionBuilder
protected ClassLoader getClassLoader()
AbstractExpressionBuilder
getClassLoader
in class AbstractExpressionBuilder
protected JPQLExpressionBuilder.ParsedJPQL getParsedQuery()
protected JPQLExpressionBuilder.ParsedJPQL getParsedQuery(String jpql)
protected ClassMetaData resolveClassMetaData(JPQLExpressionBuilder.JPQLNode node)
protected ClassMetaData getCandidateMetaData(JPQLExpressionBuilder.JPQLNode node)
protected String currentQuery()
AbstractExpressionBuilder
currentQuery
in class AbstractExpressionBuilder
QueryExpressions getQueryExpressions()
protected Expression evalFetchJoins(QueryExpressions exps)
protected void evalSetClause(QueryExpressions exps)
protected boolean isDeclaredVariable(String name)
AbstractExpressionBuilder
isDeclaredVariable
in class AbstractExpressionBuilder
name
- the variable to check
boolean isPath(JPQLExpressionBuilder.JPQLNode node)
protected Value getVariable(String id, boolean bind)
getVariable
in class AbstractExpressionBuilder
protected Value getDefinedVariable(String id)
protected boolean isSeenVariable(String var)
AbstractExpressionBuilder
isSeenVariable
in class AbstractExpressionBuilder
public static void checkEmbeddable(Value val, String currentQuery)
public static Value convertSubstringArguments(ExpressionFactory factory, Value val1, Value val2, Value val3)
val1
- the original Stringval2
- the 1-based start index as per JPQL substring() semanticsval3
- the length of the returned string as per JPQL semanticspublic void setImplicitTypes(Value val1, Value val2, Class<?> expected)
AbstractExpressionBuilder
setImplicitTypes
in class AbstractExpressionBuilder
public static void setImplicitTypes(Value val1, Value val2, Class<?> expected, Resolver resolver, OrderedMap<Object,Class<?>> parameterTypes, String currentQuery)
protected Class<?> getDeclaredVariableType(String name)
AbstractExpressionBuilder
getDeclaredVariableType
in class AbstractExpressionBuilder
protected void addSchemaToContext(String id, ClassMetaData meta)
AbstractExpressionBuilder
addSchemaToContext
in class AbstractExpressionBuilder
protected void addVariableToContext(String id, Value var)
AbstractExpressionBuilder
addVariableToContext
in class AbstractExpressionBuilder
protected Value getVariable(String var)
AbstractExpressionBuilder
getVariable
in class AbstractExpressionBuilder
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