129 lines
3.5 KiB
Java
129 lines
3.5 KiB
Java
package viewer.hoese.algebras;
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import sj.lang.ListExpr;
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import viewer.*;
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import viewer.hoese.*;
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public class Dsplarel extends DsplGeneric{
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String entry;
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static final int INDENT = 4;
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public void init (String name, int nameWidth, int indent, ListExpr type, ListExpr value, QueryResult qr) {
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int select = value.first().intValue();
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value = value.rest();
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if (select == 0)
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{
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String T = name;
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T = extendString(T, nameWidth, indent);
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entry=(T + " :");
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qr.addEntry(this);
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int maxAttribNameLen = maxAttributLength(type.second().second());
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if (nameWidth > maxAttribNameLen)
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maxAttribNameLen = nameWidth;
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while (!value.isEmpty()) {
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displayArelTuple(type.second().second(), value.first(), maxAttribNameLen, indent, qr);
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value = value.rest();
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if (!value.isEmpty())
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qr.addEntry(new Dsplend(indent + INDENT));
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}
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}
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else
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{
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entry = "Saved TupleIds are:";
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qr.addEntry(entry);
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int i = 1;
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while (!value.isEmpty()){
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entry = " TupleId no. " + i + ": " + value.first().intValue();
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qr.addEntry(entry);
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value = value.rest();
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i++;
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}
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}
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return;
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}
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/**
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* A method which create an instance of each displayclass that appears as attribute-type,
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* and calls its init method.
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* @see <a href="Dspltuplesrc.html#displayTuple">Source</a>
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*/
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private void displayArelTuple (ListExpr type, ListExpr value, int maxNameLen, int indent,QueryResult qr) {
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int i;
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String s;
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DsplBase dg;
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while (!value.isEmpty()) {
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s = type.first().first().symbolValue();
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ListExpr subType = type.first().second();
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while(subType.atomType()!=ListExpr.SYMBOL_ATOM){
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subType = subType.first();
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}
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dg = LEUtils.getClassFromName(subType.symbolValue());
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String typeName = subType.symbolValue();
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// ensure to add exactly one entry per attribute
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int oldnum = qr.getModel().getSize();
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String name = type.first().first().symbolValue();
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subType = type.first().second();
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dg.init(name, maxNameLen, indent +INDENT, subType, value.first(), qr);
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int newnum = qr.getModel().getSize();
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int diff = newnum-oldnum;
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if(diff<1){
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tools.Reporter.writeError("missing entry for attribute "+s);
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tools.Reporter.writeError("check the implementation of the class " + dg.getClass());
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qr.addEntry("error");
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}
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if (!(typeName.equals("arel"))){
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if(diff>1){
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tools.Reporter.writeError("to many entries for attribute "+s+
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"\n please check the implementation of the "+dg.getClass() + " class");
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}
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}
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type = type.rest();
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value = value.rest();
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}
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return;
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}
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/**
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* Calculate the length of the longest attribute name.
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* @param type A ListExpr of the attribute types
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* @return maximal length of attributenames
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* @see <a href="Dspltuplesrc.html#maxAttributLength">Source</a>
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*/
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private static final int maxAttributLength (ListExpr type) {
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int max, len;
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String s;
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max = 0;
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while (!type.isEmpty()) {
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s = type.first().first().symbolValue();
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len = s.length();
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if (len > max)
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max = len;
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type = type.rest();
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}
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return max;
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}
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public String toString(){
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return entry;
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}
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/**
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* Auxiliary class to display the end of tuple sign in the correct position.
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*/
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public class Dsplend extends DsplGeneric{
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private int indent;
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private int n;
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public Dsplend (int indent){
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this.indent = indent;
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}
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public String toString(){
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String s = "---------";
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s = extendString(s, 0, indent );
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return s;
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}
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}
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}
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