Example usage for org.apache.commons.collections.set ListOrderedSet iterator

Introduction

In this page you can find the example usage for org.apache.commons.collections.set ListOrderedSet iterator.

Prototype

public Iterator iterator() 

Source Link

Usage

From source file:org.apache.ddlutils.platform.mysql.MySqlBuilder.java

/**
 * {@inheritDoc}/*from   www .  jav  a  2 s .c o  m*/
 */
protected void processTableStructureChanges(Database currentModel, Database desiredModel, Table sourceTable,
        Table targetTable, Map parameters, List changes) throws IOException {
    // in order to utilize the ALTER TABLE ADD COLUMN AFTER statement
    // we have to apply the add column changes in the correct order
    // thus we first gather all add column changes and then execute them
    ArrayList addColumnChanges = new ArrayList();

    for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
        TableChange change = (TableChange) changeIt.next();

        if (change instanceof AddColumnChange) {
            addColumnChanges.add((AddColumnChange) change);
            changeIt.remove();
        }
    }
    for (Iterator changeIt = addColumnChanges.iterator(); changeIt.hasNext();) {
        AddColumnChange addColumnChange = (AddColumnChange) changeIt.next();

        processChange(currentModel, desiredModel, addColumnChange);
        changeIt.remove();
    }

    ListOrderedSet changedColumns = new ListOrderedSet();

    // we don't have to care about the order because the comparator will have ensured
    // that a add primary key change comes after all necessary columns are present
    for (Iterator changeIt = changes.iterator(); changeIt.hasNext();) {
        TableChange change = (TableChange) changeIt.next();

        if (change instanceof RemoveColumnChange) {
            processChange(currentModel, desiredModel, (RemoveColumnChange) change);
            changeIt.remove();
        } else if (change instanceof AddPrimaryKeyChange) {
            processChange(currentModel, desiredModel, (AddPrimaryKeyChange) change);
            changeIt.remove();
        } else if (change instanceof PrimaryKeyChange) {
            processChange(currentModel, desiredModel, (PrimaryKeyChange) change);
            changeIt.remove();
        } else if (change instanceof RemovePrimaryKeyChange) {
            processChange(currentModel, desiredModel, (RemovePrimaryKeyChange) change);
            changeIt.remove();
        } else if (change instanceof ColumnChange) {
            // we gather all changed columns because we can use the ALTER TABLE MODIFY COLUMN
            // statement for them
            changedColumns.add(((ColumnChange) change).getChangedColumn());
            changeIt.remove();
        }
    }
    for (Iterator columnIt = changedColumns.iterator(); columnIt.hasNext();) {
        Column sourceColumn = (Column) columnIt.next();
        Column targetColumn = targetTable.findColumn(sourceColumn.getName(),
                getPlatform().isDelimitedIdentifierModeOn());

        processColumnChange(sourceTable, targetTable, sourceColumn, targetColumn);
    }
}

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From source file:org.dentaku.services.metadata.validator.ValidatingVisitorBase.java

/**
 * Generic reflective visitor for subclasses
 *
 * @param element Element in the AST being visited
 * @param context Context for accumulating state and whatnot
 * @throws VisitorException/*from  www . j a  v  a2s .c o  m*/
 */
public void visit(ModelElement element, Object context) throws VisitorException {
    Class c = element.getClass();
    ListOrderedSet interfaces = getVisitMethodsForClass(c);
    for (Iterator it = interfaces.iterator(); it.hasNext();) {
        Method m = (Method) it.next();
        try {
            m.invoke(this, new Object[] { element, context });
        } catch (Exception e1) {
            throw new VisitorException(e1);
        }
    }
}

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