name.martingeisse.phunky.runtime.code.statement.StatementSequence.java Source code

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Here is the source code for name.martingeisse.phunky.runtime.code.statement.StatementSequence.java

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/**
 * Copyright (c) 2010 Martin Geisse
 *
 * This file is distributed under the terms of the MIT license.
 */

package name.martingeisse.phunky.runtime.code.statement;

import java.util.Iterator;
import java.util.List;

import name.martingeisse.phunky.runtime.Environment;
import name.martingeisse.phunky.runtime.code.CodeDumper;
import name.martingeisse.phunky.runtime.json.JsonListBuilder;
import name.martingeisse.phunky.runtime.json.JsonObjectBuilder;
import name.martingeisse.phunky.runtime.json.JsonValueBuilder;

import org.apache.commons.collections.iterators.ArrayIterator;

/**
 * A sequence of statements that acts as a single statement by
 * executing the sub-statements one after another.
 */
public final class StatementSequence extends AbstractStatement implements Iterable<Statement> {

    /**
     * the statements
     */
    private final Statement[] statements;

    /**
     * Constructor.
     * @param statements the sub-statements
     */
    public StatementSequence(final Statement... statements) {
        this.statements = statements.clone();
    }

    /**
     * Constructor.
     * @param statements the sub-statements
     */
    public StatementSequence(final List<Statement> statements) {
        this.statements = statements.toArray(new Statement[statements.size()]);
    }

    /**
     * Getter method for the number of sub-statements.
     * @return the number of sub-statements
     */
    public int getStatementCount() {
        return statements.length;
    }

    /**
     * Getter method for a single statement.
     * @param index the index
     * @return the statement
     */
    public Statement getStatement(int index) {
        return statements[index];
    }

    /* (non-Javadoc)
     * @see java.lang.Iterable#iterator()
     */
    @SuppressWarnings("unchecked")
    @Override
    public Iterator<Statement> iterator() {
        return new ArrayIterator(statements);
    }

    /* (non-Javadoc)
     * @see name.martingeisse.phunky.runtime.code.Statement#execute(name.martingeisse.phunky.runtime.Environment)
     */
    @Override
    public void execute(Environment environment) {
        for (Statement statement : statements) {
            statement.execute(environment);
        }
    }

    /* (non-Javadoc)
     * @see name.martingeisse.phunky.runtime.code.Statement#dump(name.martingeisse.phunky.runtime.code.CodeDumper)
     */
    @Override
    public void dump(CodeDumper dumper) {
        for (Statement statement : statements) {
            if (statement == null) {
                dumper.println("(null instead of statement);");
            } else {
                statement.dump(dumper);
            }
        }
    }

    /* (non-Javadoc)
     * @see name.martingeisse.phunky.runtime.code.statement.Statement#toJson(name.martingeisse.phunky.runtime.json.JsonValueBuilder)
     */
    @Override
    public void toJson(JsonValueBuilder<?> builder) {
        JsonObjectBuilder<?> sub = builder.object().property("type").string("sequence");
        JsonListBuilder<?> subsub = sub.property("statements").list();
        for (Statement statement : statements) {
            statement.toJson(subsub.element());
        }
        subsub.end();
        sub.end();
    }

}