plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/completion/FunctionLookup.java

/*
 * Copyright 2005 Sascha Weinreuter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.intellij.lang.xpath.completion;

import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.Iconable;
import icons.XpathIcons;
import org.intellij.lang.xpath.context.functions.Function;

import javax.swing.*;

public class FunctionLookup extends AbstractLookup implements Iconable {
    private final String type;
    private final boolean hasParameters;

    FunctionLookup(String name, String _presentation) {
        this(name, _presentation, null, false);
    }

    FunctionLookup(String name, String _presentation, String type, boolean hasParams) {
        super(name, _presentation);
        this.type = type;
        this.hasParameters = hasParams;
    }

    public String getTypeHint() {
        return type == null ? "" : type;
    }

    public boolean isFunction() {
        return true;
    }

    public boolean hasParameters() {
        return hasParameters;
    }

    public boolean isKeyword() {
        return type == null;
    }

    public Icon getIcon(int flags) {
        return XpathIcons.Function;
    }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    if (!super.equals(o)) return false;

    final FunctionLookup that = (FunctionLookup)o;

    if (!Comparing.equal(myPresentation, that.myPresentation)) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = super.hashCode();
    result = 31 * result + (type != null ? type.hashCode() : 0);
    return result;
  }

  public static Lookup newFunctionLookup(String name, Function functionDecl) {
        final String presentation = functionDecl.buildSignature();
        final String returnType = functionDecl.getReturnType().getName();
        final boolean hasParams = functionDecl.getParameters().length > 0;
        return new FunctionLookup(name, presentation, returnType, hasParams);
    }
}