org.checkerframework.dataflow.cfg.block.RegularBlockImpl Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of dataflow-shaded Show documentation

dataflow-shaded is a dataflow framework based on the javac compiler. It differs from the org.checkerframework:dataflow artifact in two ways. First, the packages in this artifact have been renamed to org.checkerframework.shaded.*. Second, unlike the dataflow artifact, this artifact contains the dependencies it requires.

There is a newer version: 3.42.0-eisop5

Show newest version

package org.checkerframework.dataflow.cfg.block;

import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.dataflow.cfg.node.Node;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/** Implementation of a regular basic block. */
public class RegularBlockImpl extends SingleSuccessorBlockImpl implements RegularBlock {

    /** Internal representation of the contents. */
    protected final List contents;

    /**
     * Initialize an empty basic block to be filled with contents and linked to other basic blocks
     * later.
     */
    public RegularBlockImpl() {
        super(BlockType.REGULAR_BLOCK);
        contents = new ArrayList<>();
    }

    /** Add a node to the contents of this basic block. */
    public void addNode(Node t) {
        contents.add(t);
        t.setBlock(this);
    }

    /** Add multiple nodes to the contents of this basic block. */
    public void addNodes(List ts) {
        for (Node t : ts) {
            addNode(t);
        }
    }

    /**
     * {@inheritDoc}
     *
     * This implementation returns an non-empty list.
     */
    @Override
    public List getNodes() {
        return Collections.unmodifiableList(contents);
    }

    @Override
    public @Nullable Node getLastNode() {
        return contents.get(contents.size() - 1);
    }

    @Override
    public @Nullable BlockImpl getRegularSuccessor() {
        return successor;
    }

    @Override
    public String toString() {
        return "RegularBlock(" + contents + ")";
    }

    @Override
    public boolean isEmpty() {
        return contents.isEmpty();
    }
}