package freemarker.core;
import freemarker.template.TemplateException;
final class ComparisonExpression extends BooleanExpression {
private final Expression left;
private final Expression right;
private final int operation;
private final String opString;
ComparisonExpression(Expression left, Expression right, String opString) {
this.left = left;
this.right = right;
opString = opString.intern();
this.opString = opString;
if (opString == "==" || opString == "=") {
operation = EvalUtil.CMP_OP_EQUALS;
} else if (opString == "!=") {
operation = EvalUtil.CMP_OP_NOT_EQUALS;
} else if (opString == "gt" || opString == "\\gt" || opString == ">" || opString == ">") {
operation = EvalUtil.CMP_OP_GREATER_THAN;
} else if (opString == "gte" || opString == "\\gte" || opString == ">=" || opString == ">=") {
operation = EvalUtil.CMP_OP_GREATER_THAN_EQUALS;
} else if (opString == "lt" || opString == "\\lt" || opString == "<" || opString == "<") {
operation = EvalUtil.CMP_OP_LESS_THAN;
} else if (opString == "lte" || opString == "\\lte" || opString == "<=" || opString == "<=") {
operation = EvalUtil.CMP_OP_LESS_THAN_EQUALS;
} else {
throw new BugException("Unknown comparison operator " + opString);
}
}
@Override
boolean evalToBoolean(Environment env) throws TemplateException {
return EvalUtil.compare(left, operation, opString, right, this, env);
}
@Override
public String getCanonicalForm() {
return left.getCanonicalForm() + ' ' + opString + ' ' + right.getCanonicalForm();
}
@Override
String getNodeTypeSymbol() {
return opString;
}
@Override
boolean isLiteral() {
return constantValue != null || (left.isLiteral() && right.isLiteral());
}
@Override
protected Expression deepCloneWithIdentifierReplaced_inner(
String replacedIdentifier, Expression replacement, ReplacemenetState replacementState) {
return new ComparisonExpression(
left.deepCloneWithIdentifierReplaced(replacedIdentifier, replacement, replacementState),
right.deepCloneWithIdentifierReplaced(replacedIdentifier, replacement, replacementState),
opString);
}
@Override
int getParameterCount() {
return 2;
}
@Override
Object getParameterValue(int idx) {
return idx == 0 ? left : right;
}
@Override
ParameterRole getParameterRole(int idx) {
return ParameterRole.forBinaryOperatorOperand(idx);
}
}