DefaultTextBlockReuseStrategy.java

package com.sap.ide.cts.parser.incremental;

import java.util.ArrayList;
import java.util.Collection;

import com.sap.furcas.metamodel.FURCAS.textblocks.AbstractToken;
import com.sap.furcas.metamodel.FURCAS.textblocks.TextBlock;
import com.sap.furcas.runtime.common.exceptions.DeferredModelElementCreationException;
import com.sap.furcas.runtime.parser.textblocks.TextBlockFactory;
import com.sap.furcas.runtime.parser.textblocks.observer.TextBlockProxy;

public class DefaultTextBlockReuseStrategy implements TextBlockReuseStrategy {

    private TextBlockFactory creator;
    private final Collection<TextBlock> changedTbs = new ArrayList<TextBlock>();

    @Override
    public boolean canBeReUsed(AbstractToken candidate, Object newToken) {
        return false;
    }

    @Override
    public TbBean reuseTextBlock(TextBlock oldVersion, TextBlockProxy newVersion) throws DeferredModelElementCreationException {
        // default is to never reuse
        TextBlock newTb = creator.createNewTextBlock(newVersion, oldVersion.getParent());
        changedTbs.add(newTb);
        return new TbBean(newTb, true, ReuseType.DELETE);
    }

    @Override
    public void setReferenceHandler(ReferenceHandler handler) {
        // TODO Auto-generated method stub
    }

    @Override
    public void setTextBlockFactory(TextBlockFactory creator) {
        this.creator = creator;
    }

    @Override
    public void notifyTokenReuse(AbstractToken subNode) {
        // TODO Auto-generated method stub

    }

    @Override
    public void clearChangedBlocksList() {
        changedTbs.clear();
    }

    @Override
    public Collection<TextBlock> getChangedBlocks() {
        return changedTbs;
    }

}