Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.programming;

import java.util.Objects;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Code;

import org.gvsig.expressionevaluator.Codes;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.impl.DefaultInterpreter;

import org.gvsig.expressionevaluator.impl.function.programming.BreakFunction.BreakException;

import org.gvsig.expressionevaluator.impl.function.programming.ReturnFunction.ReturnException;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class CodeBlockWithExceptFunction extends AbstractFunction {

    public static final String NAME = "BLOCK_EXCEPT";

    public CodeBlockWithExceptFunction() {

        super(Function.GROUP_PROGRAMMING, 

                NAME, 

                Range.between(1,Integer.MAX_VALUE),

                "Evaluate each of the arguments sequentially.",

                NAME+"( {{arguments...}} )",

                null,

                "Object",

                false

        );

    }

    @Override

    public boolean isHidden() {

      return true;

    }

    @Override

    public boolean useArgumentsInsteadObjects() {

        return true;

    }

    @Override

    public boolean allowConstantFolding() {

        return false;

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        throw new UnsupportedOperationException("Not supported yet.");

    }

    @Override

    public Object call(Interpreter interpreter, Codes args) throws Exception {

        Object value = null;

        Code exceptionCode = args.get(args.size()-1);

        if( exceptionCode==null ) {

            for (int argn = 0; argn < args.size()-1; argn++) {

                Code statement = args.get(argn);

                // LLamamos a runCode para que no atrape los returns.

                try {

                    value = ((DefaultInterpreter)interpreter).runCode(statement);

                } catch(BreakException|ReturnException ex) {

                    throw ex;

                } catch(Exception ex) {

                    String stmt = "unknown";

                    try {

                        stmt = Objects.toString(statement);

                    } catch(Exception ex2) {

                    }

                    LOGGER.warn("Error in block function calling arg "+ argn + ", "+ stmt, ex);

                    throw ex;

                }

            }

        } else {

            for (int i = 0; i < args.size()-1; i++) {

                Code statement = args.get(i);

                try {

                    // LLamamos a runCode para que no atrape los returns.

                    value = ((DefaultInterpreter)interpreter).runCode(statement);

                } catch(Exception ex) {

                    value = ((DefaultInterpreter)interpreter).runCode(exceptionCode);

                    break;

                }

            }

        }

        return value;

    }

}