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tasks/astrid/common-src/com/todoroo/andlib/sql/UnaryCriterion.java

112 lines
3.4 KiB
Java

package com.todoroo.andlib.sql;
import static com.todoroo.andlib.sql.SqlConstants.SPACE;
public class UnaryCriterion extends Criterion {
protected final Field expression;
protected final Object value;
UnaryCriterion(Field expression, Operator operator, Object value) {
super(operator);
this.expression = expression;
this.value = value;
}
@Override
protected void populate(StringBuilder sb) {
beforePopulateOperator(sb);
populateOperator(sb);
afterPopulateOperator(sb);
}
public static Criterion eq(Field expression, Object value) {
return new UnaryCriterion(expression, Operator.eq, value);
}
protected void beforePopulateOperator(StringBuilder sb) {
sb.append(expression);
}
protected void populateOperator(StringBuilder sb) {
sb.append(operator);
}
@SuppressWarnings("nls")
protected void afterPopulateOperator(StringBuilder sb) {
if(value == null)
return;
else if(value instanceof String)
sb.append("'").append(sanitize((String) value)).append("'");
else
sb.append(value);
}
/**
* Sanitize the given input for SQL
* @param input
* @return
*/
@SuppressWarnings("nls")
public static String sanitize(String input) {
return input.replace("'", "''");
}
public static Criterion neq(Field field, Object value) {
return new UnaryCriterion(field, Operator.neq, value);
}
public static Criterion gt(Field field, Object value) {
return new UnaryCriterion(field, Operator.gt, value);
}
public static Criterion lt(Field field, Object value) {
return new UnaryCriterion(field, Operator.lt, value);
}
public static Criterion lte(Field field, Object value) {
return new UnaryCriterion(field, Operator.lte, value);
}
public static Criterion isNull(Field field) {
return new UnaryCriterion(field, Operator.isNull, null) {
@Override
protected void populateOperator(StringBuilder sb) {
sb.append(SPACE).append(operator);
}
};
}
public static Criterion isNotNull(Field field) {
return new UnaryCriterion(field, Operator.isNotNull, null) {
@Override
protected void populateOperator(StringBuilder sb) {
sb.append(SPACE).append(operator);
}
};
}
public static Criterion like(Field field, String value) {
return new UnaryCriterion(field, Operator.like, value) {
@Override
protected void populateOperator(StringBuilder sb) {
sb.append(SPACE).append(operator).append(SPACE);
}
};
}
public static Criterion like(Field field, String value, final String escape) {
return new UnaryCriterion(field, Operator.like, value) {
@Override
protected void populateOperator(StringBuilder sb) {
sb.append(SPACE).append(operator).append(SPACE);
}
@SuppressWarnings("nls")
@Override
protected void afterPopulateOperator(StringBuilder sb) {
super.afterPopulateOperator(sb);
sb.append(SPACE).append("ESCAPE").append(" '").append(sanitize(escape)).append("'");
}
};
}
}