Application: gvSIG desktop

package org.gvsig.expressionevaluator.swing.impl;

import java.awt.TextComponent;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.swing.JButton;

import javax.swing.text.JTextComponent;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.SymbolTable;

import org.gvsig.expressionevaluator.swing.ExpressionEvaluatorSwingManager;

import org.gvsig.expressionevaluator.swing.JExpressionBuilder;

import org.gvsig.expressionevaluator.swing.Element;

import org.gvsig.expressionevaluator.swing.Element.ConstantElement;

import org.gvsig.expressionevaluator.swing.Element.FunctionElement;

import org.gvsig.expressionevaluator.swing.Element.GroupElement;

import org.gvsig.expressionevaluator.swing.Element.VariableElement;

import org.gvsig.expressionevaluator.swing.ElementFactory;

import org.gvsig.expressionevaluator.swing.ExpressionPickerController;

import org.gvsig.expressionevaluator.swing.JExpressionPicker;

import org.gvsig.expressionevaluator.swing.impl.elements.DefaultConstantValueElement;

import org.gvsig.expressionevaluator.swing.impl.elements.DefaultFunctionElement;

import org.gvsig.expressionevaluator.swing.impl.elements.DefaultGroupElement;

import org.gvsig.expressionevaluator.swing.impl.elements.DefaultVariableElement;

public class DefaultExpressionEvaluatorSwingManager

        implements ExpressionEvaluatorSwingManager {

    private Map<String, ElementFactory> elementsFactories;

    public DefaultExpressionEvaluatorSwingManager() {

        this.elementsFactories = new HashMap<>();

    }

    @Override

    public List<Element> createElements(Collection<SymbolTable> symbolTables) {

        Map<String, Function> functions = new HashMap<>();

        for (SymbolTable symbolTable : symbolTables) {

            for (Function function : symbolTable.functions()) {

                functions.put(function.name().toUpperCase(), function);

            }

        }

        Map<String, GroupElement> functionGroups = new HashMap<>();

        Map<String, GroupElement> operatorGroups = new HashMap<>();

        for (Function function : functions.values()) {

            if (function.isOperator()) {

                String groupName = function.group();

                GroupElement group = operatorGroups.get(groupName);

                if (group == null) {

                    group = new DefaultGroupElement(groupName);

                    operatorGroups.put(groupName, group);

                }

                group.addElement(new DefaultFunctionElement(function));

            } else {

                String groupName = function.group();

                GroupElement group = functionGroups.get(groupName);

                if (group == null) {

                    group = new DefaultGroupElement(groupName);

                    functionGroups.put(groupName, group);

                }

                group.addElement(new DefaultFunctionElement(function));

            }

        }

        GroupElement builtinFunctions = this.createGroupElement("_Builtin_functions");

        for (GroupElement group : functionGroups.values()) {

            builtinFunctions.addElement(group);

        }

        GroupElement operatorFunctions = this.createGroupElement("_Operators");

        for (GroupElement group : operatorGroups.values()) {

            operatorFunctions.addElement(group);

        }

        List<Element> elements = new ArrayList<>();

        elements.add(operatorFunctions);

        elements.add(builtinFunctions);

        return elements;

    }

    @Override

    public void registerElement(ElementFactory factory) {

        if (this.elementsFactories == null) {

            this.elementsFactories = new HashMap<>();

        }

        this.elementsFactories.put(factory.getName().toLowerCase(), factory);

    }

    @Override

    public JExpressionBuilder createJExpressionBuilder() {

        DefaultJExpressionBuilder x = new DefaultJExpressionBuilder(

                this,

                new DefaultExpressionBuilderConfig(this)

        );

        return x;

    }

    @Override

    public Element createElement(String name, Object... parameters) {

        ElementFactory factory = this.elementsFactories.get(name.toLowerCase());

        if( factory==null ) {

            throw new RuntimeException("Can't locate element factory '"+name+"'.");

        }

        return factory.createElement(parameters);

    }

    @Override

    public GroupElement createGroupElement(String name) {

        GroupElement e = new DefaultGroupElement(name);

        return e;

    }

    @Override

    public GroupElement createGroupElement(String name, List<Element> elements) {

        GroupElement e = new DefaultGroupElement(this, name, elements);

        return e;

    }

    @Override

    public FunctionElement createFunctionElement(Function function) {

        FunctionElement e = new DefaultFunctionElement(function);

        return e;

    }

    @Override

    public ConstantElement createConstantElement(Object value) {

        ConstantElement e = new DefaultConstantValueElement(value, null);

        return e;

    }

    @Override

    public ConstantElement createConstantElement(Object value, String description) {

        ConstantElement e = new DefaultConstantValueElement(value, description);

        return e;

    }

    @Override

    public VariableElement createVariableElement(String label, String source, String name, String typeName, String description) {

        VariableElement e = new DefaultVariableElement(label, source, name, typeName, description);

        return e;

    }

    @Override

    public ExpressionPickerController createExpressionPickerController(JTextComponent text, JButton button) {

        ExpressionPickerController c = new DefaultExpressionPickerController(this, text, button);

        return c;

    }

    @Override

    public JExpressionPicker createJExpressionPicker() {

        JExpressionPicker x = new DefaultJExpressionPicker(this);

        return x;

    }

}