org.pfsw.text
Class SqlMatchRuleVisitor

java.lang.Object
  org.pfsw.text.SqlMatchRuleVisitor

All Implemented Interfaces:

MatchRuleVisitor

public class SqlMatchRuleVisitor
extends java.lang.Object
implements MatchRuleVisitor

Walks over a MatchRule to create a SQL WHERE clause out of it.

MULTICHAR_WILDCARD

protected static final char MULTICHAR_WILDCARD

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Constant Field Values

SQL_OPERATOR_NOT

protected static final java.lang.String SQL_OPERATOR_NOT

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SQL_OPERATOR_AND

protected static final java.lang.String SQL_OPERATOR_AND

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SQL_OPERATOR_OR

protected static final java.lang.String SQL_OPERATOR_OR

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SQL_OPERATOR_IN

protected static final java.lang.String SQL_OPERATOR_IN

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SQL_OPERATOR_LIKE

protected static final java.lang.String SQL_OPERATOR_LIKE

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SQL_OPERATOR_EQUAL

protected static final java.lang.String SQL_OPERATOR_EQUAL

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SQL_OPERATOR_GE

protected static final java.lang.String SQL_OPERATOR_GE

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SQL_OPERATOR_LE

protected static final java.lang.String SQL_OPERATOR_LE

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SQL_OPERATOR_GREATER

protected static final java.lang.String SQL_OPERATOR_GREATER

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SQL_OPERATOR_LESS

protected static final java.lang.String SQL_OPERATOR_LESS

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OPEN_PARENTHESIS

protected static final java.lang.String OPEN_PARENTHESIS

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CLOSE_PARENTHESIS

protected static final java.lang.String CLOSE_PARENTHESIS

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COMMA

protected static final java.lang.String COMMA

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START_QUOTE

protected static final java.lang.String START_QUOTE

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END_QUOTE

protected static final java.lang.String END_QUOTE

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SqlMatchRuleVisitor

public SqlMatchRuleVisitor()

Initialize the new instance with default values.

walkThroughInit

public void walkThroughInit()

This method will be called right before the MatchRule walks through its elements.

Specified by:

walkThroughInit in interface MatchRuleVisitor

walkThroughFinished

public void walkThroughFinished()

This method will be called when the MatchRule has finished to walk through its elements.

Specified by:

walkThroughFinished in interface MatchRuleVisitor

startGroup

public void startGroup(boolean andOperator,
                       boolean notOperator)

This method will be called for each start of a new group.

Specified by:

startGroup in interface MatchRuleVisitor

Parameters:

andOperator - If true it is an AND combination otherwise it is OR

notOperator - Is only true for a NOT operation

endGroup

public void endGroup()

This method will be called for each group end occurrence.

Specified by:

endGroup in interface MatchRuleVisitor

attribute

public void attribute(java.lang.String name,
                      MatchRuleCompareOperator compareOperator,
                      java.lang.String[] values,
                      boolean andOperator,
                      boolean notOperator)

This method will be called for each attribute.

Specified by:

attribute in interface MatchRuleVisitor

Parameters:

name - The attribute's name

compareOperator - The operator used to compare values

values - All values the attrubute my match (implicit OR combination !)

andOperator - If true it is an AND combination otherwise it is OR

notOperator - Is only true for a NOT operation

asSqlClause

public java.lang.String asSqlClause(MatchRule matchRule)

Converts the given match rule into a SQL conditional clause.

Parameters:

matchRule - The rule to be converted

appendOperators

protected void appendOperators(boolean andOperator,
                               boolean notOperator)

appendAttribute

protected void appendAttribute(java.lang.String name,
                               MatchRuleCompareOperator compareOperator,
                               java.lang.String attrValue)

appendValue

protected void appendValue(java.lang.String value)

appendAttributeValues

protected void appendAttributeValues(java.lang.String name,
                                     MatchRuleCompareOperator compareOperator,
                                     java.lang.String[] values)

append_IN

protected void append_IN(java.lang.String attrName,
                         java.lang.String[] values)

canBeInOperator

protected boolean canBeInOperator(MatchRuleCompareOperator compareOperator,
                                  java.lang.String[] values)

getBuffer

protected java.lang.StringBuffer getBuffer()

setBuffer

protected void setBuffer(java.lang.StringBuffer newValue)

groupStarted

protected boolean groupStarted()

groupStarted

protected void groupStarted(boolean newValue)