package com.cedarsoft.presenter;
import com.cedarsoft.commons.struct.DepthFirstStructureTreeWalker;
import com.cedarsoft.commons.struct.StructPart;
import com.cedarsoft.commons.struct.StructureTreeWalker;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
/**
*
*/
public class StructStringPresenter implements Presenter<String> {
@NotNull
@NonNls
private final String intendSequence;
private static final char NEWLINE_CHAR = '\n';
public StructStringPresenter() {
this( " " );
}
public StructStringPresenter( @NotNull String intendSequence ) {
this.intendSequence = intendSequence;
}
@NotNull
public String present( @NotNull StructPart struct ) {
final StringBuilder builder = new StringBuilder();
StructureTreeWalker treeWalker = new DepthFirstStructureTreeWalker();
treeWalker.walk( struct, new StructureTreeWalker.WalkerCallBack() {
public void nodeReached( @NotNull StructPart node, int level ) {
for ( int i = 0; i < level; i++ ) {
builder.append( intendSequence );
}
builder.append( node.getName() );
builder.append( NEWLINE_CHAR );
}
} );
return builder.toString();
}
}