/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.jkiss.dbeaver.ui.editors.sql.templates;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.templates.TemplateVariable;
import org.eclipse.jface.text.templates.TemplateVariableResolver;
import org.eclipse.jface.text.templates.TemplateVariableType;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* {@link org.jkiss.dbeaver.ui.editors.sql.templates.SQLVariable}s can store multiple sets of data; the currently active set is determined
* by the active <em>key</em>. The key may be set via {@link #setKey(Object)}. Data sets are
* opaque {@link Object} arrays that are converted to the {@link String} values expected by
* {@link org.eclipse.jface.text.templates.TemplateVariable} using {@link Object#toString() toString}. The
* {@link #getCurrentChoice() choice} of a master variable is the {@link #setKey(Object) key} for
* the slave variable.
*/
public class SQLVariable extends TemplateVariable {
private static final Object DEFAULT_KEY = new Object();
private SQLContext context;
private TemplateVariableResolver resolver;
private final Map<Object, Object[]> fValueMap = new HashMap<>();
private Object fKey;
private Object fCurrentChoice;
public SQLVariable(SQLContext context, TemplateVariableType type, String name, int[] offsets)
{
super(type, name, name, offsets);
this.context = context;
fKey = DEFAULT_KEY;
fValueMap.put(fKey, new String[]{name});
fCurrentChoice = getChoices()[0];
}
/**
* Sets the values of this variable under a specific key.
*
* @param key the key for which the values are valid
* @param values the possible values of this variable
*/
public void setChoices(Object key, Object[] values)
{
Assert.isNotNull(key);
Assert.isTrue(values.length > 0);
// no action when called from super ctor
if (fValueMap != null) {
fValueMap.put(key, values);
if (key.equals(fKey))
fCurrentChoice = getChoices()[0];
setResolved(true);
}
}
public void setKey(Object defaultKey)
{
Assert.isTrue(fValueMap.containsKey(defaultKey));
if (!fKey.equals(defaultKey)) {
fKey = defaultKey;
fCurrentChoice = getChoices()[0];
}
}
public Object getCurrentChoice()
{
return fCurrentChoice;
}
public void setCurrentChoice(Object currentChoice)
{
Assert.isTrue(Arrays.asList(getChoices()).contains(currentChoice));
fCurrentChoice = currentChoice;
}
@Override
public void setValues(String[] values)
{
setChoices(values);
}
public void setChoices(Object[] values)
{
setChoices(DEFAULT_KEY, values);
}
@Override
public String getDefaultValue()
{
return toString(fCurrentChoice);
}
public String toString(Object object)
{
return object.toString();
}
@Override
public String[] getValues()
{
Object[] values = getChoices();
String[] result = new String[values.length];
for (int i = 0; i < result.length; i++)
result[i] = toString(values[i]);
return result;
}
public Object[] getChoices()
{
return getChoices(fKey);
}
/**
* Returns the choices for the set identified by <code>key</code>.
*
* @param key the key
* @return the choices for this variable and the given set, or
* <code>null</code> if the set is not defined.
*/
public Object[] getChoices(Object key)
{
return fValueMap.get(key);
}
public Object[][] getAllChoices()
{
return fValueMap.values().toArray(new Object[fValueMap.size()][]);
}
public TemplateVariableResolver getResolver()
{
return resolver;
}
public void setResolver(TemplateVariableResolver resolver)
{
this.resolver = resolver;
}
public ICompletionProposal[] getProposals(Position position, int length)
{
if (resolver != null) {
resolver.resolve(this, context);
}
String[] values = getValues();
ICompletionProposal[] proposals = new ICompletionProposal[values.length];
for (int j = 0; j < values.length; j++) {
proposals[j] = new SQLVariableCompletionProposal(this, values[j], position, length);
}
return proposals;
}
public SQLContext getContext()
{
return context;
}
}