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/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.internal.db.dml;
import org.eclipse.net4j.db.DBType;
import org.eclipse.net4j.db.ddl.IDBField;
import org.eclipse.net4j.db.ddl.IDBSchemaElement;
import org.eclipse.net4j.db.dml.IDBParameter;
import org.eclipse.net4j.db.dml.IDBStatement;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public class DBStatement implements IDBStatement
{
private static final DBParameter[] NO_PARAMETERS = {};
private List<DBParameter> parameters;
private List<Object> sequence = new ArrayList<Object>();
public IDBParameter addParameter(DBType type)
{
int position = 0;
if (parameters == null)
{
parameters = new ArrayList<DBParameter>();
}
else
{
position = parameters.size();
}
DBParameter parameter = new DBParameter(this, position, type);
parameters.add(parameter);
return parameter;
}
public IDBParameter addParameter(IDBField field)
{
return addParameter(field.getType());
}
public DBParameter[] getParameters()
{
if (parameters == null)
{
return NO_PARAMETERS;
}
return parameters.toArray(new DBParameter[parameters.size()]);
}
public void addSQL(String literal)
{
int tailPos = sequence.size() - 1;
Object tail = sequence.get(tailPos);
if (tail instanceof String)
{
sequence.set(tailPos, (String)tail + literal);
}
else
{
sequence.add(literal);
}
}
public void addSQL(IDBParameter parameter)
{
sequence.add(parameter);
}
public void addSQL(IDBSchemaElement schemaElement)
{
addSQL(schemaElement.getName());
}
public String getSQL()
{
StringBuilder builder = new StringBuilder();
for (Object element : sequence)
{
if (element instanceof IDBParameter)
{
builder.append("?"); //$NON-NLS-1$
}
else
{
builder.append(element);
}
}
return builder.toString();
}
}
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