TriggerDefSQL.java

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package org.hsqldb;

import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.lib.OrderedHashSet;
import org.hsqldb.result.Result;

/**
 * Implementation of SQL TRIGGER objects.<p>
 *
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 2.7.3
 * @since 1.9.0
 */
public class TriggerDefSQL extends TriggerDef {

    public TriggerDefSQL(
            HsqlNameManager.HsqlName name,
            int when,
            int operation,
            boolean forEachRow,
            Table table,
            Table[] transitions,
            RangeVariable[] rangeVars,
            Expression condition,
            String conditionSQL,
            int[] updateColumns,
            Routine routine) {

        super(
            name,
            when,
            operation,
            forEachRow,
            table,
            transitions,
            rangeVars,
            condition,
            conditionSQL,
            updateColumns);

        this.routine = routine;
    }

    public OrderedHashSet<HsqlName> getReferences() {
        return routine.getReferences();
    }

    public void compile(Session session, SchemaObject parentObject) {
        routine.compile(session, this);
    }

    public String getClassName() {
        return null;
    }

    public boolean hasOldTable() {
        return transitions[OLD_TABLE] != null;
    }

    public boolean hasNewTable() {
        return transitions[NEW_TABLE] != null;
    }

    synchronized void pushPair(
            Session session,
            Object[] oldData,
            Object[] newData) {

        Result result = Result.updateZeroResult;

        session.sessionContext.push();

        if (rangeVars[OLD_ROW] != null || rangeVars[NEW_ROW] != null) {
            session.sessionContext.triggerArguments = new Object[][] {
                oldData, newData
            };
        }

        if (condition.testCondition(session)) {
            int variableCount = routine.getVariableCount();

            session.sessionContext.routineVariables = new Object[variableCount];
            result = routine.statement.execute(session);
        }

        session.sessionContext.pop();

        if (result.isError()) {
            throw result.getException();
        }
    }

    public String getSQL() {

        StringBuilder sb = getSQLMain();

        sb.append(routine.statement.getSQL());

        return sb.toString();
    }
}