com.helger.html.jscode.JSAssignment Maven / Gradle / Ivy

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Java library to programmtically create JavaScript in a structured way
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/**
 * Copyright (C) 2014-2016 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * 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 com.helger.html.jscode;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.helger.commons.ValueEnforcer;
import com.helger.commons.annotation.Nonempty;
import com.helger.commons.hashcode.HashCodeGenerator;
import com.helger.commons.string.ToStringGenerator;
import com.helger.html.js.IJSWriterSettings;

/**
 * Assignment statements, which are also expressions.
 *
 * @author Philip Helger
 */
public class JSAssignment extends AbstractJSExpression implements IJSStatement
{
  private final IJSAssignmentTarget m_aLhs;
  private final String m_sOp;
  private final IJSExpression m_aRhs;

  public JSAssignment (@Nonnull final IJSAssignmentTarget aLhs,
                       @Nonnull @Nonempty final String sOp,
                       @Nonnull final IJSExpression aRhs)
  {
    m_aLhs = ValueEnforcer.notNull (aLhs, "Lhs");
    m_sOp = ValueEnforcer.notEmpty (sOp, "Operator");
    m_aRhs = ValueEnforcer.notNull (aRhs, "Rhs");
  }

  @Nonnull
  public IJSAssignmentTarget lhs ()
  {
    return m_aLhs;
  }

  @Nonnull
  @Nonempty
  public String operator ()
  {
    return m_sOp;
  }

  @Nonnull
  public IJSExpression rhs ()
  {
    return m_aRhs;
  }

  public void generate (@Nonnull final JSFormatter aFormatter)
  {
    aFormatter.generatable (m_aLhs).plain (m_sOp).generatable (m_aRhs);
  }

  public void state (@Nonnull final JSFormatter aFormatter)
  {
    aFormatter.generatable (this).plain (';').nl ();
  }

  @Override
  @Nullable
  public String getJSCode (@Nullable final IJSWriterSettings aSettings)
  {
    return JSPrinter.getAsString (aSettings, (IJSStatement) this);
  }

  @Override
  public boolean equals (final Object o)
  {
    if (o == this)
      return true;
    if (!super.equals (o))
      return false;
    final JSAssignment rhs = (JSAssignment) o;
    return m_aLhs.equals (rhs.m_aLhs) && m_sOp.equals (rhs.m_sOp) && m_aRhs.equals (rhs.m_aRhs);
  }

  @Override
  public int hashCode ()
  {
    return HashCodeGenerator.getDerived (super.hashCode ())
                            .append (m_aLhs)
                            .append (m_sOp)
                            .append (m_aRhs)
                            .getHashCode ();
  }

  @Override
  public String toString ()
  {
    return ToStringGenerator.getDerived (super.toString ())
                            .append ("lhs", m_aLhs)
                            .append ("op", m_sOp)
                            .append ("rhs", m_aRhs)
                            .toString ();
  }
}