oracle.toplink.essentials.internal.parsing.TrimNode Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.parsing;
import oracle.toplink.essentials.expressions.*;
/**
* INTERNAL
* Purpose: Represent a TRIM
*
Responsibilities:
* - Generate the correct expression for TRIM
*
*/
public class TrimNode extends StringFunctionNode {
private Node trimChar;
private boolean leading;
private boolean trailing;
private boolean both;
/**
* TrimNode constructor.
*/
public TrimNode() {
super();
}
/**
* INTERNAL
* Validate node and calculate its type.
*/
public void validate(ParseTreeContext context) {
TypeHelper typeHelper = context.getTypeHelper();
if (left != null) {
left.validate(context);
left.validateParameter(context, typeHelper.getStringType());
}
if (trimChar != null) {
trimChar.validate(context);
trimChar.validateParameter(context, typeHelper.getCharType());
}
setType(typeHelper.getStringType());
}
/**
* INTERNAL
* Generate the TopLink expression for this node
*/
public Expression generateExpression(GenerationContext context) {
Expression whereClause = getLeft().generateExpression(context);
if (leading) {
// use leftTrim
if (trimChar != null) {
Expression trimCharExpr = trimChar.generateExpression(context);
whereClause = whereClause.leftTrim(trimCharExpr);
} else {
whereClause = whereClause.leftTrim();
}
} else if (trailing) {
if (trimChar != null) {
Expression trimCharExpr = trimChar.generateExpression(context);
whereClause = whereClause.rightTrim(trimCharExpr);
} else {
whereClause = whereClause.rightTrim();
}
} else {
if (trimChar != null) {
Expression trimCharExpr = trimChar.generateExpression(context);
whereClause = whereClause.leftTrim(trimCharExpr).rightTrim(trimCharExpr);
} else {
whereClause = whereClause.leftTrim().rightTrim();
}
}
return whereClause;
}
/** */
public void setTrimChar(Node trimChar) {
this.trimChar = trimChar;
}
/** */
public boolean isLeading() {
return leading;
}
/** */
public void setLeading(boolean newLeading) {
this.leading = newLeading;
}
/** */
public boolean isTrailing() {
return trailing;
}
/** */
public void setTrailing(boolean newTrailing) {
this.trailing = newTrailing;
}
/** */
public boolean isBoth() {
return both;
}
/** */
public void setBoth(boolean newBoth) {
this.both = newBoth;
}
}